''Xanthosia atkinsoniana'', is a small herb in the family

Apiaceae Apiaceae or Umbelliferae is a family of mostly aromatic flowering plants named after the type genus '' Apium'' and commonly known as the celery, carrot or parsley family, or simply as umbellifers. It is the 16th-largest family of flowering plan ...

. It grows in both

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

and

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

Description

''Xanthosia atkinsoniana'' is an erect, perennial herb growing to 60 cm high. It is sparsely hairy, becoming smooth with age. The flowering stems are almost leafless. The leaves (on a petiole of length 2–12 cm) mostly occur at the base of the plant, with the leaf-blade being 2–4 cm by 1.5–4 cm. They are dissected in threes with the segments often being divided again, and the lower surfaces have sparse stellate hairs. The umbels are 16–36-flowered, and on a stout peduncle up to 40 cm long. The white bracteoles are like petals and 3–8 mm long. The sepals are about 1–1.6 mm long, and the white to pinkish petals are about 1.5 mm long, white to pinkish. The disc-like enlargement of the base of the style (the stylopodium) is hairy. The fruits are 1.8–2.7 mm long and split into 9-ribbed mericarps. In

it flowers from September to April. In

, it flowers from October to December, or January to April.

Taxonomy and naming

''Xanthosia atkinsonia'' was described in 1861 by Ferdinand von Mueller. The specific epithet, ''atkinsoniana'', honours

Louisa Atkinson Caroline Louisa Waring Calvert (; 25 February 1834 – 28 April 1872) was an early Australian writer, botanist and illustrator. While she was well known for her fiction during her lifetime, her long-term significance rests on her botanical work ...

who collected the type specimen: "In montibus coeruleis Novae Austro-Cambriae prope amnem Grose stirpem detexerunt L. Atkinson et W. Woolls." (L.Atkinson & W. Woolls detected it near the

Grose River The Grose River, a Perennial stream, perennial river that is part of the Hawkesbury River, Hawkesbury-Nepean River, Nepean catchment, is located in the Blue Mountains (New South Wales), Blue Mountains region of New South Wales, Australia. Cour ...

in the Blue Mountains of New South Wales). There are no synonyms.

References

External links

''Xanthosia atkinsoniana'': Occurrence data from The Australasian Virtual Herbarium
{{Taxonbar, from=Q17140995 Mackinlayoideae Apiales of Australia Flora of New South Wales Eudicots of Western Australia Plants described in 1861 Taxa named by Ferdinand von Mueller