Swainsona katjarra R.W.Davis & T.Hammer
Birriliburu swainsona

Scientific Description

Genus Swainsona. Form erect. 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 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 60-90. 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) NaN (?), Arrangement pinnately arranged. Terminal leaflet Presence present, Stalk sessile (?) or stalked (?). Indumentum Presence glabrous. Stipules Presence apparently absent even from the youngest leaves (?), present and persistent to older leaves (?) or present but early deciduous ( only visible on youngest leaves ) (?), Glands with glands (?) or without glands (?), Ribs ribbed (?) or ribless (?). Length Stipule length NaN (?). Bracteoles Presence present and persistent (?), absent (?) or present but early deciduous (?), 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 5-6. Indumentum Presence hairy, Type with simple hairs. Corolla Colour patterning uniformly coloured, Colour (when uniformly coloured) purple, Petal claws ( the narrow base of the petals present (?) or absent (?). Length Corolla length 16. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 12-12.5. Wings Auricles not auriculate. Length Wing length 9-11. Keel Auricles not auriculate, Indumentum glabrous, Beak beaked (?) or not beaked (?). Length Keel length 11-12. Stamens Number ten. Anthers anther length NaN (?), Position at two different levels (filaments alternately long and short). Filaments Fusion united in an open sheath with one free stamen. 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 4.5-5. Fruit Type dehiscent (a pod or follicle) (?), indehiscent and not splitting into sections (?) or indehiscent and splitting into sections (schizocarps) (?), Constriction constricted between the seeds (?) or not constricted between the seeds (?), Compression flat or compressed (?) or round in cross-section (?), Placement stipitate (?) or sessile or subsessile (?), Beak beaked (?) or not beaked (?). Length Fruit length NaN (?). Width Fruit width NaN (?). Indumentum Presence hairy (?) or glabrous (?), Indumentum type with simple hairs (?) or with glandular hairs (?). Flowering time August or December. Distribution Botanical Province Eremaean, IBRA Bioregion Gascoyne, Little Sandy Desert or Murchison. Conservation Code Priority One (P1).