National recovery plan for the Endangered Osborn's Eyebright (Euphrasia collina subsp. osbornii)
Department for Environment and Heritage, South Australia
- National recovery plan for the Endangered Osborn's Eyebright (Euphrasia collina subsp. osbornii) (PDF - 1,200 KB) | (RTF - 4,523 KB)
Euphrasia collina subsp. osbornii (Osborn's Eyebright) is a South Australian endemic plant. It is an erect, perennial, partly parasitic herb, 25 to 47 cm high (Barker, 1982), characterised by decussate leaves that are thick, fleshy and pale green. The leaves have 1-8, usually 3-6, pairs of blunt teeth along margins and are covered with glandular hairs (Barker, 1982). The flowers vary from white to pink or lavender and paler inside (Jessop and Toelken, 1986; Barker, 1982). The corolla is bilabiate with a tube, a hooded upper lip and a three lobed spreading lower lip (Jessop and Toelken, 1986). A yellow spot is sometimes found behind the lowest lobe (Barker, 1982). The lobes are pubescent over all but the tips (Jessop and Toelken, 1986). Euphrasia collina subsp. osbornii usually flowers from August to December, although collections have been made in March and June (Barker, 1982).
Euphrasia collina subsp. osbornii (W.R. Barker) is currently listed in South Australia as endangered under the National Parks and Wildlife Act 1972 (NPW, 1972) and as endangered at the national level under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). Euphrasia collina subsp. osbornii also meets the 2001 IUCN criteria EN B2ac (ii, iv), because its area of occupancy is less than 500km2, it has a projected continuing decline in area of occupancy and number of mature individuals, and experiences extreme fluctuations in the area of occupancy and number of mature individuals. The subspecies occurs in seven protected areas, five reserves and four heritage agreements within South Australia.
The overall objective of this Recovery Plan is to reduce the extinction risk of this subspecies so that it is downlisted from endangered to vulnerable.