Datasheet
Cardiospermum grandiflorum (balloon vine)
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Pictures
Top of page| Picture | Title | Caption | Copyright |  | Title | Habit |
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| Caption | Cardiospermum grandiflorum (balloon vine); habit with pods and flowers. Mount Ommaney, Brisbane, Queensland. January 2012. |
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| Copyright | ©Tatters/Tatiana Gerus-2012/via flickr - CC BY-SA 2.0 |
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| Habit | Cardiospermum grandiflorum (balloon vine); habit with pods and flowers. Mount Ommaney, Brisbane, Queensland. January 2012. | ©Tatters/Tatiana Gerus-2012/via flickr - CC BY-SA 2.0 |
 | Title | Flowers |
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| Caption | Cardiospermum grandiflorum (balloon vine); close-up of flowers. Timbavati Picnic Site, S40 Road West of Satara, Kruger NP, South Africa. February 2014. |
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| Copyright | ©Bernard Dupont/via wikipedia - CC BY-SA 2.0 |
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| Flowers | Cardiospermum grandiflorum (balloon vine); close-up of flowers. Timbavati Picnic Site, S40 Road West of Satara, Kruger NP, South Africa. February 2014. | ©Bernard Dupont/via wikipedia - CC BY-SA 2.0 |
 | Title | Fruits |
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| Caption | Cardiospermum grandiflorum (balloon vine); fruits, on fence of banana plantation. Puerto de la Cruz, Tenerife, Canary Islands. February 2016. |
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| Copyright | ©Krzysztof Ziarnek, Kenraiz/via wikipedia - CC BY-SA 4.0 |
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| Fruits | Cardiospermum grandiflorum (balloon vine); fruits, on fence of banana plantation. Puerto de la Cruz, Tenerife, Canary Islands. February 2016. | ©Krzysztof Ziarnek, Kenraiz/via wikipedia - CC BY-SA 4.0 |
 | Title | Mature fruits |
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| Caption | Cardiospermum grandiflorum (balloon vine); mature fruits. Canary Islands. October 2009. |
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| Copyright | ©Bernd Sauerwein-2009/via wikipedia - CC BY-SA 3.0 |
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| Mature fruits | Cardiospermum grandiflorum (balloon vine); mature fruits. Canary Islands. October 2009. | ©Bernd Sauerwein-2009/via wikipedia - CC BY-SA 3.0 |
Identity
Top of pagePreferred Scientific Name
- Cardiospermum grandiflorum Sw.
Preferred Common Name
Other Scientific Names
- Cardiospermum barbicaule Baker
- Cardiospermum coluteoides Kunth
- Cardiospermum duarteanum Cambess.
- Cardiospermum elegans Kunth
- Cardiospermum grandiflorum f. elegans (Kunth) Radlk.
- Cardiospermum grandiflorum f. hirsutum (Willd.) Radlk.
- Cardiospermum grandiflorum var. hirsutum Hiern
- Cardiospermum hirsutum Willd.
- Cardiospermum hispidum Kunth
- Cardiospermum inflatum Vell.
- Cardiospermum macrophyllum Kunth
- Cardiospermum pilosum Vell.
- Cardiospermum velutinum Hook. & Arn.
- Cardiospermum vesicarum Humb.
International Common Names
- English: balloonvine; heart seed vine; heartseed; showy balloon vine
- Spanish: amor en bolsa; farolillo; globillo; tronadora
- Portuguese: balãozinho; cipó-timbó-miudo
Local Common Names
- Australia: large balloon creeper
- Cook Islands: kopupu takaviri
- Jamaica: heart pea; wild supple jack
- South Africa: blaasklimop; heart seed; intandela; opblaasboontjie; uzipho
Summary of Invasiveness
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The balloon vine C. grandiflorum has been introduced around the world mainly as an ornamental plant. It has escaped from cultivation and become naturalized and invasive mostly in wet and humid habitats. Once established, it grows rapidly into the tops of trees, forms a thick curtain of stems, excluding light, and harbours pests and diseases. Weight contributes to canopy collapse and ecosystem destruction. C. grandiflorum is a declared noxious weed in Australia and South Africa, is reported as invasive in many other countries, and is likely to spread. In Australia, it has notable environmental impacts, especially by its invasion of remnant areas of rainforest. Control has proved difficult. In Europe, it was added to the EPPO Alert List in 2012 and transferred to the List of Invasive Alien Plants in 2013.
Taxonomic Tree
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- Domain: Eukaryota
- Kingdom: Plantae
- Phylum: Spermatophyta
- Subphylum: Angiospermae
- Class: Dicotyledonae
- Order: Sapindales
- Family: Sapindaceae
- Genus: Cardiospermum
- Species: Cardiospermum grandiflorum
Notes on Taxonomy and Nomenclature
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Cardiospermum is a small genus (ca. 17 species) of mostly herbaceous, tendrilled vines or sometimes erect shrubs or subshrubs (Ferrucci, 2000; Acevedo-Rodriguez et al., 2011). Cardiospermum, along with several genera of vines, belongs in the tribe Paullinieae of the Sapindaceae. The Sapindaceae is a medium sized family with about 140 genera and 1900 species, most of which are distributed throughout the tropics; some genera are abundant in the sub-temperate zones. The Sapindaceae as currently understood includes the members of Aceraceae and Hippocastanaceae as subfamilies. Members of the family are mostly trees or shrubs with a large percentage of climbers in the Neotropics.
Recent DNA studies suggest Cardiospermum to a be morphological group of not directly related species. A revision of the genus may show it to contain fewer species than currently recognized (Acevedo-Rodriguez et al., unpublished data). Most Cardiospermum species are restricted to the Neotropics, from Mexico to Argentina, including the West Indies. Of these, three are also found in the Paleotropics, two of which are also considered native to the Old World.
A large number of synonyms of C. grandiflorum reflects the confusion regarding the limits to the species in the past, with populations in Africa and the Americas recognized as synonyms of a large but variable species (Ferrucci, 2000; USDA-ARS, 2015). The genus name Cardiospermum comes from the Greek kardia (heart) and sperma (seed), referring to the heart-shaped white spot round the hilum on the seeds of some species. The species epithet grandiflorum means large-flowered. The common name balloon vine is a reference to the balloon-like fruit of the species.
Description
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Perennial, climbing, woody vine with numerous lateral branches that climbs by means of tendrils and attains 5-8 m in length. Stems almost cylindrical, striate, glabrous; cross section with a single vascular cylinder. Leaves alternate, biternate; leaflets chartaceous, glabrous except for some hairs on the veins, the margins deeply serrate; terminal leaflet rhombic, 4.5-8 × 2-4 cm, the apex acute or acuminate, the base cuneate or attenuate; lateral leaflets oblong-lanceolate, 2.7-7 × 1.3-3cm, the apex acute or acuminate, the base obtuse or attenuate; rachis and petiole not winged, canaliculate; petioles 1-5 cm long; stipules minute, early deciduous; tendrils in pairs, spirally twisted, at the end of short axillary axes (aborted inflorescences), from which an inflorescence usually develops. Flowers functionally unisexual, zygomorphic, in axillary racemiform thyrses; cincinni more than 4, usually in more than one whorl. Calyx light green, of 4 sepals, the two outer ones ca. 1.7-3 mm long, the inner ones ca. 5-8mm long; petals white, obovate, 6-9 mm long; petaliferous appendages slightly shorter than the petals, fleshy and yellow at the apex, forming a hood that encloses the apex of the glands of the disc; disc unilateral, with 2 elongate glands, corniform, whitish, 1.2-2 mm long; stamens 8, the filaments unequal, glabrous or pubescent; ovary ovoid or ellipsoid, villous, with one style and 3 stigmas. Capsule membranaceous, inflated, ellipsoid or ovoid, 3-5.5 cm long, stramineous when ripe. Seed one per locule, spherical, black,4-5.5 mm in diameter, with a white, obtuse triangular hilum (Acevedo-Rodriguez, 2005).
Plant Type
Top of pageBiennial
Broadleaved
Herbaceous
Perennial
Seed propagated
Vine / climber
Distribution
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The very broad native range covering much of Africa and the Americas as reported in USDA-ARS (2015) and Wagner et al. (1999) reflects the taxonomic confusion that has surrounded the species. However, USDA-ARS (2015) also questions whether C. grandiflorum is native to Africa, suggesting that revision may be possible. Furthermore, others (e.g. Carroll et al., 2005) consider that the species is only native to the Americas, and that native populations in Africa belong to other species – a conclusion which is accepted for the purposes of this datasheet. This is supported by the review of Gildenhuys et al. (2013), which notes a native range restricted to the Americas, but states that the native status of populations in West Africa are as yet unconfirmed, though those in South Africa and Australia are introduced and invasive. Gildenhuys et al. (2015) further confirm the invasive status in southern Africa and Australia and suggest that its status (native or invasive) should be reviewed in other regions outside South America.
C. grandiflorum is frequent on the eastern coast of Australia in New South Wales and Queensland with isolated occurrences in Western Australia (near Perth) and South Australia (AVH, 2014). It is also introduced and invasive in some Pacific islands, notable in the Cook Islands, Hawaii and French Polynesia. EPPO (2014) record it as present in Sicily, the Canary Islands and Madeira.
Distribution Table
Top of pageThe distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.
| Country | Distribution | Last Reported | Origin | First Reported | Invasive | References | Notes | ASIA |
| Sri Lanka | Present | | Introduced | | | GBIF, 2014 | |
AFRICA |
| Angola | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Benin | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Botswana | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Cameroon | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Central African Republic | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Congo | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Congo Democratic Republic | Present | | | | | EPPO, 2014 | |
| Côte d'Ivoire | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Ghana | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Guinea | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Kenya | Present | | Introduced | | Invasive | BioNET-EAFRINET, 2015; EPPO, 2014 | Noxious weed |
| Liberia | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Malawi | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Namibia | Present | | Introduced | | Invasive | Bethune et al., 2004; EPPO, 2014 | |
| Nigeria | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Sierra Leone | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| South Africa | Present | | | | | EPPO, 2014; Foxcroft et al., 2008 | |
| Spain | | | | | | | |
| -Canary Islands | Present | | | | | EPPO, 2014; DAISIE, 2015 | |
| Sudan | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Swaziland | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Tanzania | Present | | Introduced | | Invasive | BioNET-EAFRINET, 2015; EPPO, 2014 | Noxious weed |
| Togo | Present | | | | | EPPO, 2014 | |
| Uganda | Present | | Introduced | | Invasive | BioNET-EAFRINET, 2015; EPPO, 2014 | Noxious weed |
| Zambia | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Zimbabwe | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
NORTH AMERICA |
| Mexico | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| USA | Present | | | | | EPPO, 2014; Datamining 2011 - Invasive Species Databases | |
| -California | Localised | | Introduced | | | Gildenhuys et al., 2013 | |
| -Hawaii | Present | | Introduced | | Invasive | PIER, 2015; EPPO, 2014 | O’ahu |
CENTRAL AMERICA AND CARIBBEAN |
| Belize | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Costa Rica | Present | | | | | EPPO, 2014; PIER, 2015 | |
| El Salvador | Present | | | | | EPPO, 2014; PIER, 2015 | |
| Guatemala | Present | | | | | EPPO, 2014 | |
| Honduras | Present | | | | | EPPO, 2014; PIER, 2015 | |
| Jamaica | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Nicaragua | Present | | | | | EPPO, 2014; PIER, 2015 | |
| Panama | Present | | | | | EPPO, 2014; PIER, 2015 | |
| Puerto Rico | Present | | Introduced | | | Rojas-Sandoval & Acevedo-Rodríguez, 2015 | Potentially invasive |
| United States Virgin Islands | Present | | | | | Acevedo-Rodríguez, 2005 | St. Croix, St. Thomas |
SOUTH AMERICA |
| Argentina | Present | | Native | | | Flora del Conosur, 2015; EPPO, 2014 | Buenos Aires, Córdoba, Corrientes, Entre Ríos, Formosa, Misiones, Tucumán |
| Bolivia | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Brazil | Present | | | | | EPPO, 2014 | |
| -Amazonas | Present | | Native | | | Somner et al., 2015 | |
| -Espirito Santo | Present | | Native | | | Somner et al., 2015 | |
| -Goias | Present | | Native | | | Somner et al., 2015 | |
| -Maranhao | Present | | Native | | | Somner et al., 2015 | |
| -Mato Grosso do Sul | Present | | Native | | | Somner et al., 2015 | |
| -Minas Gerais | Present | | Native | | | Somner et al., 2015 | |
| -Para | Present | | Native | | | Somner et al., 2015 | |
| -Parana | Present | | Native | | | Somner et al., 2015 | |
| -Rio de Janeiro | Present | | Native | | | Somner et al., 2015 | |
| -Rio Grande do Norte | Present | | Native | | | Somner et al., 2015 | |
| -Rio Grande do Sul | Present | | Native | | | Somner et al., 2015 | |
| -Rondonia | Present | | Native | | | Somner et al., 2015 | |
| -Santa Catarina | Present | | Native | | | Somner et al., 2015 | |
| -Sao Paulo | Present | | Native | | | Somner et al., 2015 | |
| Colombia | Present | | Native | | | Missouri Botanical Garden, 2014 | |
| Ecuador | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Guyana | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Paraguay | Present | | Native | | | Flora del Conosur, 2015; EPPO, 2014 | Alto Paraná, Alto Paraguay, Amambay, Caaguazú, Caazapá, Canindeyú, Central, Concepción, Cordillera, Guairá, Itapúa, Ñeembucú, Paraguarí, SanPedro |
| Peru | Present | | | | | EPPO, 2014; USDA-ARS, 2015 | |
| Uruguay | Present | | Native | | | Flora del Conosur, 2015; EPPO, 2014 | Canelones, Colonia, Soriano |
| Venezuela | Present | | | | | EPPO, 2014 | |
EUROPE |
| Belgium | Absent, no pest record | | | | | EPPO, 2014 | |
| France | Present, few occurrences | | | | | EPPO, 2014; DAISIE, 2015 | |
| Italy | Present | | | | | EPPO, 2014 | |
| -Sicily | Present | | | | | EPPO, 2014; DAISIE, 2015 | |
| Malta | Present, few occurrences | | | | | EPPO, 2014 | |
| Portugal | Present | | | | | EPPO, 2014 | |
| -Madeira | Present | | | | | EPPO, 2014; DAISIE, 2015 | |
| Spain | Present | | | | | EPPO, 2014 | |
OCEANIA |
| Australia | Present | | | | | EPPO, 2014 | |
| -New South Wales | Present | | | | | EPPO, 2014; AVH, 2015 | |
| -Queensland | Present | | | | | EPPO, 2014 | |
| -South Australia | Present | | Introduced | | | AVH, 2015 | |
| -Western Australia | Localised | | Introduced | | | AVH, 2015 | |
| Cook Islands | Widespread | | Introduced | | Invasive | PIER, 2015; EPPO, 2014 | Rarotonga |
| French Polynesia | Widespread | | Introduced | | Invasive | PIER, 2015; EPPO, 2014 | Tahiti |
| New Zealand | Present | | | | | EPPO, 2014 | |
History of Introduction and Spread
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C. grandiflorum was first recorded in Australia in 1923 from near Sydney, and its invasive history there is mapped and described by Carroll et al. (2005), with five loci of introductions recorded. In 1935, further records were reported from around Sydney as well as 600 km further north, and it first spread and expanded from these two centres. The first records from Queensland were in 1944 and 1945, and the species was already recognised as an environmental weed by 1955 but received attention only in recent decades. By 1995, it was recorded throughout much of the east coast, and spread further north since that date. It is now a declared noxious weed in Queensland and parts of New South Wales (Carroll et al., 2005). There were also isolated records from South Australia near Adelaide in the 1980s described as ‘vigorous’, and from Perth in Western Australia in the 1990s described as ‘rampant’ and ‘locally abundant’ (Carroll et al., 2005).
C. grandiflorum was introduced into South Africa about 100 years ago and is considered invasive in five provinces, with Kwazulu-Natal and the Eastern Cape being the most affected (Simelane et al. 2011).
Although dates of introduction in the Pacific are unknown, C. grandiflorum is very widespread and invasive on Rarotonga, Cook Islands, and also invasive on O’ahu in Hawaii and on Tahiti island in French Polynesia. The species is noted as rare in New Zealand, but with the potential to become widespread. There is also a single record from Los Angeles, California (Gildenhuys et al., 2013). C. grandiflorum was described in 1788 from material collected in Jamaica where it is presumably native.
Risk of Introduction
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C. grandiflorum scored a very high 18 in a risk assessment for the Pacific region, compared to a score of 12 for C. halicacabum (PIER, 2015). Although it is declared a noxious weed in Australia and South Africa, the serious invasive risk it poses may not be widely acknowledged elsewhere, and as such, further introduction of the species for ornamental purposes is possible. Gildenhuys et al. (2013) used native range data to test a bioclimatic model that showed that species of Cardiospermum have potential to spread further in already invaded or introduced regions in Australia, Africa and Asia. The model predicted Australia to have especially favourable conditions for C. corindum, highlighting that extra vigilance should be shown with this species.
Habitat
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C. grandiflorum grows along streams, rivers, gullies, creeks and other riparian habitats. It inhabits the margins of natural forests and will eventually invade from the edge inwards. It is also found in rocky areas, disturbed sites, and it has also become a weed in built up and open urban areas, and along road and rail networks (EPPO, 2014).
Habitat List
Top of page| Category | Habitat | Presence | Status | | Terrestrial-managed |
| Disturbed areas | Present, no further details | Harmful (pest or invasive) |
| Managed forests, plantations and orchards | Present, no further details | Harmful (pest or invasive) |
| Rail / roadsides | Present, no further details | Harmful (pest or invasive) |
| Urban / peri-urban areas | Present, no further details | Harmful (pest or invasive) |
| Urban / peri-urban areas | Present, no further details | Productive/non-natural |
| Terrestrial-natural/semi-natural |
| Natural forests | Present, no further details | Harmful (pest or invasive) |
| Natural forests | Present, no further details | Natural |
| Riverbanks | Principal habitat | Harmful (pest or invasive) |
| Riverbanks | Principal habitat | Natural |
| Rocky areas / lava flows | Present, no further details | Harmful (pest or invasive) |
Biology and Ecology
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Genetics
The chromosome number of C. grandiflorum has been recorded as 2n=20 by Hemmer and Morawetz (1990) and as 2n=22 by Paiva and Leitao (1989).
Reproductive Biology
C. grandiflorum is monoecious, with staminate and pistillate flowers (although appearing as bisexual) (Solis et al., 2010). Whereas there is limited data on the reproductive biology of C. grandiflorum, there is more published information on the closely related C. halicacabum, which is self-compatible, having functionally unisexual flowers, and the occurrence of two sexual phases on this functionally monoecious plant that might be a strategy for geitonogamous reproduction (Das and Raju, 2006). Pollination is by insects such as flies, bees, butterflies and wasps. This species also spreads vegetatively by suckering and root fragments.
Physiology and Phenology
Plants flower all year round, and seed germination can occur at any time during the year. In Australia, this species has been recorded flowering throughout the year, but is most abundant from summer through to winter (Weeds of Australia, 2015). In Puerto Rico, it has been collected in flower in December and in fruit in February (Acevedo-Rodriguez, 2005). Seed longevity is estimated to be around two years, but further research is being undertaken to improve the understanding of various aspects of the plant ecology.
Environmental Requirements
C. grandiflorum is a tropical, sub-tropical species that thrives in well-drained soils and riparian habitat, preferring moist soils and tolerating occasional flooding. It grows on a variety of soil types in Australia, but is more commonly found on alluvial, gravelly, loam and sandy loam soils. C. grandiflorum tolerates some shade but is most vigorous in full sun (PIER, 2015).
Climate
Top of page| Climate | Status | Description | Remark | | Af - Tropical rainforest climate | Preferred | > 60mm precipitation per month | |
| Am - Tropical monsoon climate | Preferred | Tropical monsoon climate ( < 60mm precipitation driest month but > (100 - [total annual precipitation(mm}/25])) | |
| As - Tropical savanna climate with dry summer | Preferred | < 60mm precipitation driest month (in summer) and < (100 - [total annual precipitation{mm}/25]) | |
| Aw - Tropical wet and dry savanna climate | Preferred | < 60mm precipitation driest month (in winter) and < (100 - [total annual precipitation{mm}/25]) | |
| Cs - Warm temperate climate with dry summer | Preferred | Warm average temp. > 10°C, Cold average temp. > 0°C, dry summers | |
Air Temperature
Top of page| Parameter | Lower limit | Upper limit | | Mean annual temperature (ºC) | 15 | 25 |
Rainfall
Top of page| Parameter | Lower limit | Upper limit | Description | | Dry season duration | 0 | 5 | number of consecutive months with <40 mm rainfall |
| Mean annual rainfall | 500 | 2000 | mm; lower/upper limits |
Soil Tolerances
Top of pageSoil drainage
- free
- seasonally waterlogged
Soil reaction
Soil texture
Special soil tolerances
Notes on Natural Enemies
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Surveys of the natural enemies associated with C. grandiflorum were conducted in northern Argentina (McKay et al., 2010), and 17 phytophagous insects in five orders and ten families, and two fungal pathogens were found. The seed-feeding weevil Cissoanthonomus tuberculipennis (Coleoptera: Curculionidae) and the fruit-galling midge Contarinia sp. (Diptera: Cecidomyiidae) were identified as the most promising biological control agents for C. grandiflorum outside of its native range (McKay et al., 2010). Lampert et al. (2013) also found C. tuberculipennis preying on seeds of C. grandiflorum.
A stromatic tar-spot fungus Phyllachora serjaniicola was found associated with C. grandiflorum from Brazil, the first report of this fungus on C. grandiflorum (Pereira et al., 2010).
A new insect in the genus Leptocoris was found feeding and reproducing on C. grandiflorum seeds in the Ruwenzori Mountains in western Uganda, and named Leptocoris ursulae (Perreira et al., 2012).
Carroll et al. (2005) also identified a native Australian insect that had expanded its host range to include C. grandiflorum, showing that over the past 30-40 years, these insects have evolved 5-10% longer mouthparts, better suited to attack this species which have large fruits, and suggesting that native biota may rapidly respond in ways that ultimately facilitate control. Andres et al. (2013) furthered this work, showing that Leptocoris tagalicus evolved significantly longer beaks and new allometries via hybridisation to attack C. halicacabum, but that in contrast, those feeding on C. grandiflorum showed no evidence of admixture and were genetically indistinguishable from nearby populations on a native host.
Means of Movement and Dispersal
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C. grandiflorum reproduces by seeds, which are transported by wind and water, mostly while attached to membranous septa of the fruit (Carroll et al., 2005). Plants are also reported to regrow from root fragments.
Whole fruits float and dispersal is thus aided by water. They are also transported by seawater, possibly aiding introduction over very large distances between land masses, and unpublished studies showed that they could remain viable for at least 25 weeks (Gildenhuys et al., 2013). C. grandiflorum was introduced to the Cook Islands after a hurricane, and in Australia, spread was associated with flooding that followed a major cyclone (Gildenhuys et al., 2013).
C. grandiflorum was introduced outside its native distribution range as a garden ornamental, and as an ornamental, it is possible that it has also been dispersed locally by the dumping of garden waste. The species is cultivated for its curious seeds, which are usually carried around by humans.
Pathway Causes
Top of page| Cause | Notes | Long Distance | Local | References | | Disturbance | Seed and root fragments | Yes | Yes | PIER, 2015 |
| Escape from confinement/ garden escape | Seed and root fragments | Yes | Yes | PIER, 2015 |
| Garden waste disposal | Seed and root fragments | Yes | Yes | PIER, 2015 |
| Nursery trade | Commercialized as ornamental | Yes | Yes | Henderson, 2001 |
| Ornamental purposes | Commercialized as ornamental | Yes | Yes | Henderson, 2001 |
Impact Summary
Top of page| Category | Impact | | Economic/livelihood | Positive and negative |
| Environment (generally) | Negative |
Economic Impact
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C. grandiflorum has been reported to reduce tree growth in forestry plantations in Ghana (Anning and Yeboah-Gyan, 2007), and also on islands of the Pacific (Waterhouse, 1997).
Environmental Impact
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The invasive climber C. grandiflorum grows in damp conditions often near river banks, forming dense infestations. Plants can grow to enormous lengths and are capable of smothering trees 10 m tall. The main mode of climbing is via the extensive tendrils, which twirl around supporting structures and other plants, forming large and dense smothering curtains of tangled stems that impede the growth of supporting vegetation, excluding light, harbouring pests and diseases and eventually killing trees. The weight of this species in severe infestations can also contribute to canopy collapse and ecosystem destruction. Seedlings of native shrubs and trees are unable to establish under the stands of this plant (PIER, 2015). C grandiflorum can also prevent the free movement of wildlife so has great potential to negatively impact biodiversity.
Risk and Impact Factors
Top of pageImpact mechanisms
- Competition - monopolizing resources
- Competition - shading
- Competition - smothering
- Competition - strangling
- Rapid growth
- Rooting
Impact outcomes
- Damaged ecosystem services
- Ecosystem change/ habitat alteration
- Modification of successional patterns
- Monoculture formation
- Reduced native biodiversity
- Threat to/ loss of native species
Invasiveness
- Abundant in its native range
- Benefits from human association (i.e. it is a human commensal)
- Has a broad native range
- Has high genetic variability
- Has propagules that can remain viable for more than one year
- Highly adaptable to different environments
- Highly mobile locally
- Is a habitat generalist
- Pioneering in disturbed areas
- Proved invasive outside its native range
- Tolerates, or benefits from, cultivation, browsing pressure, mutilation, fire etc
Likelihood of entry/control
- Difficult to identify/detect in the field
- Difficult/costly to control
- Highly likely to be transported internationally deliberately
Uses
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C. grandiflorum has been widely planted as an ornamental plant around the world. Different parts of this species are also used in traditional medicine. For example, root derivatives are used for their laxative, emetic and diuretic effects and leaves can be made into medicines to alleviate swelling, oedema and pulmonary complications (Aluka, 2008). Extracts have amoxicillin activity on Staphylococcus aureus (Nnamani et al., 2012), antioxidant and antibacterial properties (Sofidiya et al., 2012), and C. grandiflorum extracts are also used to ease the pain of childbirth in Cote d’Ivoire (Zirihi and Ahmad, 1996).
Uses List
Top of pageEnvironmental
General
Human food and beverage
Medicinal, pharmaceutical
Ornamental
- Propagation material
- Seed trade
Similarities to Other Species/Conditions
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The native Australian plant known as slender grape (Cayratia clematidea) is relatively similar to C. grandiflorum, but has five leaflets on each leaf and its fruit is a small black berry.
C. grandiflorum is very similar in appearance to the closely related Cardiospermum halicacabum, but these two species can be distinguished in the following characters:
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C. grandiflorum has large leaves (6-16 cm long) and densely hairy younger stems. Its flowers (6-11 mm long) and papery capsules (5-6.5 cm long) are also relatively large. Floral nectary has 2, long, corniform lobes.
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C. halicacabum has relatively small leaves (4-12 cm long) and finely hairy to almost hairless younger stems. Its flowers (3-4 mm long) and papery capsules (1-3 cm long) are also relatively small. Floral nectary has 4, short, ovoid or rounded lobes.
Prevention and Control
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Physical/Mechanical Control
For small plants and small infestations, manual removal is recommended, pulling the plants out by the roots, though thicker growth may require using a brush hook or similar tool to bring down the top part of the plant. Regrowth is common and the taproot is removed, or a combination of manual and chemical control may be required (Biosecurity Queensland, 2013).
Chemical Control
Biosecurity Queensland (2013) lists permitted herbicides for control of C. grandiflorum as glyphosate as a cut stump treatment, and fluroxypyr and 2-4, D amine for spot spraying. Plants can be cut at waist height for glyphosate treatment in dense infestations, leaving supporting vegetation in place to rot away, and any resprout can then also be sprayed. However, management with herbicides is often made difficult because of their close proximity to water sources, and native species can be affected (PIER, 2015).
Biological Control
Research began in 2003 to find biological control agents against C. grandiflorum for use in South Africa, and eight insects and two fungal agents were identified for host-specificity testing (Simelane et al., 2011). Most were also capable of feeding and developing on other Cardiospermum spp. in South Africa, in particular C. halicacabum and C. corindum (McKay et al. 2010). Three promising agents were identified. These were a seed-feeding weevil Cissoanthonomus tuberculipennis (further researched by Lampert et al., 2013), a fruit-galling midge Contarinia spp., and the rust fungus Puccinia arechavaletae (Simelane et al., 2011). Concerns about their potential impacts on the non-target Cardiospermum species and the uncertain native status of these species in southern Africa were reported to have initially prevented their release (Gildenhuys et al., 2013). However, Simelane et al. (2014) state that host-specificity tests, open field tests and long-term monitoring of C. tuberculipennis populations demonstrate that the weevil poses no threat to non-target plant species, and therefore is safe for release against C. grandiflorum in South Africa. Permission to release C. tuberculipennis in South Africa has been granted by the relevant regulatory authorities. Gildenhuys et al. (2015) strongly recommended monitoring of non-target impacts on C. corindum and C. pechueli.
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Contributors
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10/06/15 Updated by:
Julissa Rojas-Sandoval, Department of Botany-Smithsonian NMNH, Washington DC, USA
11/05/14 Original text by:
Nick Pasiecznik, Agroforestry Enterprises, Villebeuf, Cussy en Morvan, France
Distribution Maps
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- = Present, no further details
- = Evidence of pathogen
- = Widespread
- = Last reported
- = Localised
- = Presence unconfirmed
- = Confined and subject to quarantine
- = See regional map for distribution within the country
- = Occasional or few reports