Skip to main content

Isotropis iophyta Wege & R.W.Davis
Eremaean Lamb’s Poison

Nuytsia 31:187-190, Fig. 1 (2020)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Scientific Description

Erect, shrub, spindly shrub (broom-like). Stems terete, not spiny, glabrous. Leaves or phylloclades clearly present, simple, alternate, not continuous with stem, 8-20 mm long, 4-6 mm wide, hairy, with simple hairs, flat with flat margins; margins entire; tubercles absent; pustules or glands absent. Calyx 8-9 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 12 mm long, multicoloured, orange, mostly red; claws present; standard 10-12 mm long, glabrous, not auriculate, wings 8-10.5 mm long, not auriculate, keel 10-12 mm long, not beaked, not auriculate, glabrous. Ovary sessile or subsessile, hairy or glandular; style 10-11 mm long, hairy or glandular towards the base, not bearded. Fruit dehiscent (a pod or follicle), 20-25 mm long, 9-10 mm wide, sessile or subsessile, not constricted between the seeds, round in cross-section, hairy, with simple hairs, not beaked. Flowers in July, August and September. Occurs in the Eremaean Botanical Province, in the Gascoyne and Little Sandy Desert IBRA regions.

C. Hollister and K.R. Thiele, 24 October 2023


IBRA Regions
Gascoyne, Little Sandy Desert, Murchison, Pilbara.
IBRA Subregions
Augustus, Carnegie, Chichester, Eastern Murchison, Hamersley, Trainor, Western Murchison.
Local Government Areas (LGAs)
Ashburton, East Pilbara, Leonora, Meekatharra, Wiluna.