Isotropis drummondii Meisn.
Lamb Poison

Scientific Description

Genus Isotropis. Form prostrate,spreading or scrambling. Habit shrub, spindly shrub (broom-like) or herb. Stems Indumentum hairy, Pustules or glands absent, Striation (stems ribbed) not striate, Cross section terete, Spiny on any part of plant not spiny. Leaves or phylloclades Presence clearly present, Position alternate, Leaves simple, Leaves or phylloclade continuous with stem not continuous with stem, Cross section of leaf or leaflet flat with flat margins, Margins of leaf or leaflet entire, Tuberculate tubercles absent, Pustules or glands absent. Length Leaf length 10-16. Width (entire leaves only) Leaf width 2-4. Scale leaves length mm long NaN (?). Indumentum Presence glabrous. Stipules Presence present and persistent to older leaves, Glands without glands, Ribs ribless. Length Stipule length 2-2.5. Bracteoles Presence present and persistent, Indumentum glabrous, Striation not striate. Length Bracteole length 2.5. Pedicel Presence present, Indumentum hairy. Length Pedicel length 10.5-12. Calyx Pustules or glands absent, Ribs ribless, Enlarged in fruit not accrescent. Length Calyx length 10-10.5. Indumentum Presence hairy, Type with simple hairs. Corolla Colour patterning multicoloured, Colour (when multicoloured - choose one colour) yellow, pink, red, orange or white, Colour (when multicoloured - choose a second colour) yellow, pink, red, orange or white, Petal claws ( the narrow base of the petals absent. Length Corolla length 13-19. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 12-15. Wings Auricles not auriculate. Length Wing length 11-13. Keel Auricles not auriculate, Indumentum glabrous, Beak not beaked. Length Keel length 11-12. Stamens Number ten. Anthers anther length 1.2-2, Position at two different levels (filaments alternately long and short). Filaments Fusion free (or united at the very base). Length Filament length 7-10. Ovary Placement sessile or subsessile. Indumentum Presence hairy or glandular. Style Indumentum hairy or glandular towards the base, Bearded ( with a tuft of hairs at apex ) not bearded, Apex terete. Length Style length 12-15. Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression round in cross-section, Placement sessile or subsessile, Beak not beaked. Length Fruit length NaN (?). Width Fruit width NaN (?). Indumentum Presence hairy, Indumentum type with simple hairs. Flowering time September or November. Distribution Botanical Province Eremaean or South-West, IBRA Bioregion Coolgardie, Nullarbor, Geraldton Sandplains, Avon Wheatbelt, Jarrah Forest, Mallee, Esperance or Swan Coastal Plain.