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Euphrasia, or eyebright, is a genus of about 215 species of herbaceous flowering plants in the family Orobanchaceae (formerly included in the Scrophulariaceae), with a cosmopolitan distribution. They are hemiparasitic on grasses and other plants.
Euphrasia vigursii, also known by its common names of Vigur's eyebright [3] or Cornish eyebright, [4] is an endangered annual of the eyebright family which is endemic to Devon and Cornwall. [5] [6] [7] It is a facultative hemiparasite and needs open conditions and regular grazing of larger shrubs and grasses to grow.
Euphrasia stricta, the drug eyebright, is an annual forb in the genus Euphrasia. [1]It has been introduced in northeastern North America, where it is found in New England (except Connecticut), New York, Pennsylvania, Nova Scotia, New Brunswick, Prince Edward Island, Ontario, Quebec, the upper peninsula of Michigan, northern Wisconsin, Minnesota and Illinois. [2]
Euphrasia officinalis, also known as eyebright or eyewort, is a species of plant in the family Orobanchaceae. [ 2 ] Euphrasia officinalis herb has been used in the traditional Austrian medicine internally as tea, or externally as compresses, for treatment of disorders of the eyes and the gastrointestinal tract.
Euphrasia nemorosa, the common eyebright, is a hemiparasitic, annual species of flowering plant in the family Orobanchaceae. It is native to Europe and has been introduced to North America and New Zealand. [1] It is the commonest species of Euphrasia in Britain and Ireland. [2]
Euphrasia arguta is a plant from the genus Euphrasia (eyebrights) within the family Orobanchaceae. The species was last recorded in June 1904 near Tamworth, New South Wales, Australia, and was presumed extinct until rediscovered in 2008 by Forests worker Graham Marshall in NSW's Nundle State Forest.
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This species is a short lived annual to perennial herb. Its height is usually below 35 cm (14 in). Its stems are erect, branching above ground level. Its leaves are alternating opposite pairs, 5–10 mm (0.20–0.39 in) long and 3–5 mm (0.12–0.20 in) wide, appear semi-succulent with obvious deep venations with no more than 6 teeth per leaf, underside of leaf with characteristic patches of ...