Swainsona gracilis Benth.

Scientific Description

Genus Swainsona. Form prostrate,spreading or scrambling. Habit herb. Stems Indumentum glabrous, 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 compound, 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 20-50. Width (entire leaves only) Leaf width NaN (?). Scale leaves length mm long NaN (?). Leaflets Number more than three, Number of leaflets (if more than three) 7-11, Arrangement pinnately arranged. Terminal leaflet Presence present, Stalk stalked. Indumentum Presence glabrous. 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 and persistent, Indumentum hairy, Striation not striate. Length Bracteole length 2-3. Pedicel Presence present, Indumentum glabrous. Length Pedicel length 2.5-2.6. Calyx Pustules or glands absent, Ribs ribless, Enlarged in fruit not accrescent. Length Calyx length 4-4.5. Indumentum Presence glabrous. Corolla Colour patterning multicoloured, Colour (when multicoloured - choose one colour) purple or blue, Colour (when multicoloured - choose a second colour) purple or blue, Petal claws ( the narrow base of the petals present. Length Corolla length 7-9. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 7-8.5. Wings Auricles not auriculate. Length Wing length 6.5-6.7. Keel Auricles not auriculate, Indumentum glabrous, Beak beaked or not beaked. Length Keel length 7-7.5. Stamens Number ten. Anthers anther length 0.2-0.3, Position at two different levels (filaments alternately long and short). Filaments Fusion united in an open sheath with one free stamen. Length Filament length 5-6.2. Ovary Placement stipitate. Indumentum Presence glabrous. Style Indumentum glabrous, Bearded ( with a tuft of hairs at apex ) bearded (with a tuft of hairs at apex), Apex flattened at apex. Length Style length 8-9.4. Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression flat or compressed, Placement stipitate. Length Fruit length 7-10. Width Fruit width 6-7. Indumentum Presence glabrous. Flowering time August or September. Distribution Botanical Province Eremaean or South-West, IBRA Bioregion Carnarvon, Gascoyne, Yalgoo, Murchison, Coolgardie, Geraldton Sandplains or Avon Wheatbelt.