Thomasia petalocalyx F.Muell.

Paper flower

Defin. Austral. Pl. 2 ; Trans. Philos. Soc. Victoria 1: 35 (1855)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: rare (r)

Shrub 0.3–1 m high. Leaves ovate to lanceolate or more or less oblong, 1–4 cm long, 0.5–1.3 cm wide, both surfaces with stellate hairs; petioles to c. 5 mm long; stipules leaf-like, sessile, 8–12 mm long, 4–8 mm wide. Inflorescence 1–5-flowered; bracteoles 3, 5–6 mm long, 2.5–3 mm wide, greenish, conspicuously stellate-hairy on the outer surface but rather sparsely so on the inner surface; calyx segments 7–8 mm long, 3.5–4.5 mm wide, papery, purplish, both surfaces variably stellate-hairy; petals less than 1 mm long, red and somewhat glandular; anthers red-brown, c. 2 mm long; style glabrous. Capsule enclosed in the calyx. Flowers Sep.–Mar.

GipP, Glep, GGr, LoM, OtP, WaP, WPro, Wim. Also WA, SA. In Victoria scattered in drier forests, heathy woodland and coastal heaths west of Port Phillip Bay, apparently restricted to Wilsons Promontory in the east.

Source: Short, P.S. (1996). Sterculiaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2019-08-13
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Malvales
family Malvaceae
genus Thomasia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Thomasia petalocalyx in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Thomasia petalocalyx in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Wimmera present native
Glenelg Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Greater Grampians present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
South Australia
Australian Capital Territory