Swainsona formosa (G.Don) Joy Thomps.

Scientific Description

Genus Swainsona. Form prostrate,spreading or scrambling. Habit herb. Stems Indumentum hairy, Pustules or glands absent, Striation (stems ribbed) not striate, Cross section terete or flattened, 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 45-185. 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) 13-19, Arrangement pinnately arranged. Terminal leaflet Presence present, Stalk stalked. Indumentum Presence hairy, Type simple. Stipules Presence present and persistent to older leaves, Glands without glands, Ribs ribless. Length Stipule length 10-20. Bracteoles Presence present and persistent, Indumentum hairy (?) or glabrous (?), Striation striate (?) or not striate (?). Length Bracteole length NaN (?). Pedicel Presence present (?) or absent (flowers sessile) (?), Indumentum hairy (?) or glabrous (?). Length Pedicel length NaN (?). Calyx Pustules or glands absent, Ribs ribless, Enlarged in fruit not accrescent. Length Calyx length 15-23. Indumentum Presence hairy, Type with simple hairs. Corolla Colour patterning uniformly coloured or multicoloured, Colour (when uniformly coloured) red, Colour (when multicoloured - choose one colour) red or black, Colour (when multicoloured - choose a second colour) red or black, Petal claws ( the narrow base of the petals present. Length Corolla length NaN (?). Indumentum Presence absent (?) or present (?). Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 55-70. Wings Auricles auriculate. Length Wing length 7-8.5. Keel Auricles auriculate, Indumentum glabrous, Beak beaked or not beaked. Length Keel length 26-50. Stamens Number ten. Anthers anther length NaN (?), Position all at the same level (filaments all the same loength) (?) or at two different levels (filaments alternately long and short) (?). Filaments Fusion free (or united at the very base) (?), united in an open sheath (?), united in a closed sheath (?) or united in an open sheath with one free stamen (?). Length Filament length NaN (?). Ovary Placement stipitate (?) or sessile or subsessile (?). Indumentum Presence hairy or glandular (?) or glabrous (?). Style Indumentum hairy or glandular towards the base (?) or glabrous (?), Bearded ( with a tuft of hairs at apex ) bearded (with a tuft of hairs at apex) (?) or not bearded (?), Apex terete (?) or flattened at apex (?). Length Style length NaN (?). Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression round in cross-section, Placement stipitate. Length Fruit length 60-70. Width Fruit width 10-12. Indumentum Presence hairy, Indumentum type with simple hairs. Flowering time June, July, August, September or October. Distribution Botanical Province Eremaean or South-West, IBRA Bioregion Great Sandy Desert, Pilbara, Carnarvon, Gascoyne, Little Sandy Desert, Central Ranges, Murchison, Great Victorian Desert, Coolgardie, Nullarbor or Avon Wheatbelt.