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E. atrovirens is a caespitose perennial grass. Rhizomes absent. Culms loosely tufted, erect or geniculate at base, 15–100 cm tall, approximately 4 mm...

Cover for Pantoea ananatis (fruitlet rot of pineapple)

To classify P. ananatis as an invasive pathogen is difficult. It is a ubiquitous bacterium (Coutinho et al., 2006) and a common epiphyte on plant...

Cover for Podosphaera pannosa (powdery mildew of rose)

The genus Rosa, comprising about 150 species, is distributed in Asia, Europe, North Africa and North America. The origin of the rose powdery mildew,...

Cover for Ageratum conyzoides (billy goat weed)

A. conyzoides is an erect, branching, annual herb with shallow, fibrous roots. It may, depending upon environmental conditions, reach 50-1500 mm tall...

Cover for Prosopis juliflora (mesquite)

The following description is taken from Burkart (1976) as the over-arching species morphology including all varieties from all parts of the world....

Cover for Cervus canadensis (wapiti)

C. canadensis is the largest species in the genus Cervus.  Adult males in Fiordland, New Zealand, in the 1960s (before substantial hybridization with...


The following description is from PROTA (2016):Annual, ascending from a creeping base; culms 4–30 cm. high. Leaf-blades 1–5 cm. long, 1–4 mm. wide....

Cover for Paysandisia archon (South American palm borer)

P. archon is an attractive Neotropical castniid moth. The eggs are fusiform, resembling a rice grain, light cream or creamy pink when freshly laid,...

Cover for Prosopis pallida (mesquite)

The following description is taken from Burkart (1976) as this description is still accepted in the absence of a new acknowledged taxonomy. Tree...

Cover for Ambrosia artemisiifolia (common ragweed)

Annual herb (therophyte), (10-)20-60(-150) cm tall. Stems erect. Leaves opposite (proximal) and alternate, with blades lanceolate or elliptic...

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