Gastrolobium callistachys Meisn.
Rock Poison

Scientific Description

Genus Gastrolobium. Form prostrate,spreading or scrambling. Habit shrub, spindly shrub (broom-like). 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 opposite or whorled, Leaves simple, Leaves or phylloclade continuous with stem continuous with stem, Cross section of leaf or leaflet flat with flat margins or flat with recurved margins, Margins of leaf or leaflet entire, Tuberculate tubercles absent, Pustules or glands absent. Length Leaf length 25-45. Width (entire leaves only) Leaf width 1.2-2.2. Scale leaves length mm long NaN (?). Indumentum Presence hairy, Type simple. Stipules Presence present and persistent to older leaves, Glands with glands (?) or without glands (?), Ribs ribbed (?) or ribless (?). Length Stipule length NaN (?). Bracteoles Presence present but early deciduous, Indumentum hairy (?) or glabrous (?), Striation striate (?) or not striate (?). Length Bracteole length NaN (?). Pedicel Presence present, Indumentum hairy. Length Pedicel length 4.2-4.5. Calyx Pustules or glands absent, Ribs ribless, Enlarged in fruit not accrescent. Length Calyx length 6.5-7.5. Indumentum Presence hairy, Type with simple hairs. Corolla Colour patterning multicoloured, Colour (when multicoloured - choose one colour) yellow or orange, Colour (when multicoloured - choose a second colour) yellow or orange, Petal claws ( the narrow base of the petals present. Length Corolla length 12-14. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 11.5-12. Wings Auricles auriculate. Length Wing length 11-11.5. Keel Auricles auriculate, Indumentum glabrous, Beak not beaked. Length Keel length 11-11.5. Stamens Number ten. Anthers anther length 1-1.2, Position at two different levels (filaments alternately long and short). Filaments Fusion free (or united at the very base). Length Filament length 8.5-12.5. Ovary Placement stipitate. 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 12-13. Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression round in cross-section, Placement stipitate, Beak not beaked. Length Fruit length 8-9. Width Fruit width 5.5-6. Indumentum Presence hairy, Indumentum type with simple hairs. Flowering time September, October or November. Distribution Botanical Province South-West, IBRA Bioregion Geraldton Sandplains, Avon Wheatbelt, Jarrah Forest or Swan Coastal Plain.