The Eurasian Square-stalked St. John's-wort (Hypericum tetrapterum Fr.: Hypericaceae) was found growing in an open Eastern White Cedar (Thuja occidentalis L.) swamp in Caledon, Regional Municipality of Peel, Ontario. This is the first record for eastern North America; previous North American...

Biological control agents may have unintended effects on native biota, particularly species that are closely related to the target invader. Here, we explored how Chrysolina quadrigemina, a beetle introduced to control the invasive weed Hypericum perforatum, impacts native H. punctatum in Tompkins...

Hypericum androsaemum L. (tutsan) invades pastures and natural ecosystems in high rainfall areas of south-eastern Australia. The rust fungus Melampsora hypericorum was detected in Australia in 1991 and drastically reduced the extent of H. androsaemum populations in some areas. The impact of the...

Background: Propolis and Hypericum perforatum L. are natural products which contain many active compounds and have numerous beneficial effects, including an antitumor effect. Gliobmastoma multiforme (GBM) is a common primary brain tumor with poor prognosis and limited treatment options. In this...

In the spring of 2005, a severe disease was observed on Hypericum formosum in several gardens at Chiayi, Taiwan. Infected plants showed symptoms of leaf drooping initially, resulting in severe wilting and plant death in 1-2 weeks. The internal tissues of infected basal stems turned dark brown in...

Tutsan (Hypericum androsaemum) is a highly invasive semi-evergreen shrubby weed found throughout New Zealand. Described as a serious pasture weed in 1937, it has been held in check for many years by tutsan rust. Recently it has spread rapidly into pasture, forestry and conservation areas. Present...

Background: Studies on plant-plant interactions in alpine ecosystems show a strong bias for temperate vs. tropical latitudes and pay limited attention to the implications of biophysical heterogeneity beyond the local plant scale. Aims: To evaluate the effects of a dominant shrub (Hypericum...

In June and July 2013, Southern blight symptoms were observed on St John's wort, Japanese valerian, common verbena, fairy bells and chives in Kodaira, Japan. From each symptom, one fungus was isolated. Koch's postulates were conducted by inoculating these healthy plants with the isolated fungi and...

This study was carried out to investigate the flora, vegetation and soil properties of serpentine area in Andong, Korea. The vascular plants identified during the seven-round field surveys were a total of 359 taxa: 88 families, 239 genera, 311 species, 6 subspecies, 33 varieties, 6 forms and 3...

Canaan Valley (hereafter, the Valley), in northeastern West Virginia, supports large areas of wetland, upland forest, and upland non-forest habitats at relatively high elevations, providing potential habitat for a variety of rare plant species. The presence of 54 species of plants considered to be...