Solanum rostratum Dunal

Buffalo Burr

Hist. Nat. Solanum 234, t. 24 (1813) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Annual herb to 1 m high, green or grey-green, pubescent with stellate and minute glandular hairs; prickles to 10 mm long, straight, abundant on most parts of plant. Leaves ovate or ovate-oblong, mostly 2–10 cm long, 1–8 cm wide, deeply lobed or pinnatipartite, concolorous, both surfaces pubescent; lobes obovate, margins irregularly sinuate, sometimes lobed to midrib near base; petiole to 5 cm long, decurrent. Inflorescences simple, few–10-flowered; peduncle 15–30 mm long. Flowers on pedicels 5–10 mm long; calyx 6–10 mm long, very spiny, accrescent in fruit, lobes narrow-triangular, 3–5 mm long; corolla rotate, 30–40 mm diam., bright yellow, lobes irregular, 1 or 2 longer than the rest; anthers unequal, 4 anthers 6–8 mm long and straight, the fifth c. 10 mm long and curved. Berry globose, c. 10 mm diam., partially enclosed by calyx, drying blackish, skin papery; seeds 2–2.5 mm long, dark brown or black. Flowers mostly summer and autumn.

*Gold, *MuM, *NIS, *VRiv, *Wim. Also naturalised WA, SA, Qld, NSW, ACT. Native to northern Mexico; widely naturalised in other countries. Widespread in north and north-west Victoria, usually in cereal growing areas on disturbed sites. Declared a noxious weed in Victoria.

Source: Jeanes, J.A. (1999). Solanaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-06-18
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Solanales
family Solanaceae
genus Solanum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Solanum rostratum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Solanum rostratum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present introduced
Wimmera present naturalised
Victorian Riverina present introduced
Goldfields present introduced
Northern Inland Slopes present naturalised

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory