Pimelea williamsonii J.M.Black

Williamson's Rice-flower

Trans. & Proc. Roy. Soc. South Australia 43: 37 (1919) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v)

Annual subshrub, 10–30 cm high; young stems densely hairy. Leaves alternate to almost opposite, shortly petiolate, more or less elliptic, 7–15 mm long, 2–4 mm wide, more or less concolorous, mid green, undersurface covered in antrorse hairs, upper surface with fewer finer hairs. Inflorescence terminal, elongate, usually continuous at maturity, to 65 mm long, many-flowered; involucral bracts absent or not differentiated from leaves. Flowers bisexual, brownish, outside covered by short white hairs and long brownish hairs, glabrous inside; floral tube c. 3 mm long, style-portion shorter than ovary-portion, circumscissile above ovary; sepals erect, c. 1 mm long; pedicel hairy; stamens inserted below sepals, almost sessile in throat; anthers opening laterally; style not or little exserted. Fruit dry, enclosed.

LoM, MuM. Also SA. Mostly growing on light sandy soil in the Hattah Lakes area. Regarded as extinct in Victoria until several plants were observed in 1990 following wildfire in 1988.

The brown hairs on the outside of flowers are characteristic.

Source: Entwisle, T.J. (1996). Thymelaeaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2019-05-13
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Malvales
family Thymelaeaceae
genus Pimelea
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Pimelea williamsonii in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Pimelea williamsonii in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native

State distribution

Distribution map
South Australia