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Commonly known as hellebores (/ ˈhɛləbɔːrz /), the Eurasian [2] genus Helleborus consists of approximately 20 species of herbaceous or evergreen perennial flowering plants in the family Ranunculaceae, within which it gave its name to the tribe of Helleboreae. Many hellebore [3] species are poisonous. Despite common names such as winter ...
Fully formed leaves will appear to wilt as if the plant were water stressed. Rose rosette disease – This disease is caused by a relatively recently described virus, Rose rosette emaravirus, [10] that is transmitted by an eriophyid, rose leaf curl mite (Phyllocoptes fructiphilus), which inhabits the shoot tips and leaf petal bases of roses, as ...
Helleborus niger. Helleborus niger, commonly called Christmas rose or black hellebore, is an evergreen perennial flowering plant in the buttercup family, Ranunculaceae. It is one of about 20 species from the genus Hellebore. It is a poisonous cottage garden favourite because it flowers in the depths of winter.
Cutaneous or skin sporotrichosis. This is the most common form of this disease. Symptoms of this form include nodular lesions or bumps in the skin, at the point of entry and also along lymph nodes and vessels. The lesion starts off small and painless, and ranges in color from pink to purple. Left untreated, the lesion becomes larger and look ...
F.A.Wolf (1912) Diplocarpon rosae is a fungus that creates the rose black spot disease. [1] Because it was observed by people of various countries around the same time (around 1830), the nomenclature for the fungus varied with about 25 different names. The asexual stage is now known to be Marssonina rosae, while the sexual and most common stage ...
Description. This perennial reaches 28–45 cm (11–18 in) tall, with glossy green palmate leaves composed of 7–9 leaflets with serrated leaf margins. Leathery in texture, the leaves are evergreen. The cup-shaped pendent flowers appear in late winter and spring, arising in groups of 1–4 on the ends of thick stems rising above the foliage.
Toxicodendron radicans, commonly known as eastern poison ivy[3] or poison ivy, is an allergenic flowering plant that occurs in Asia and eastern North America. The species is well known for causing urushiol-induced contact dermatitis, an itchy, irritating, and sometimes painful rash, in most people who touch it.
It was introduced as a new rose cultivar named 'American Beauty' by Bancroft and Field Bros in 1886, but quite soon identified as 'Madame Ferdinand Jamin'. In 1888, Bassett & Washburn first introduced the rose to other florists for purchase. It became a famous greenhouse variety and was the best selling rose cultivar in the United States until ...