Sesbania simpliciuscula var. fitzroyensis N.T.Burb.

Scientific Description

Genus Sesbania. Form erect. Habit shrub, spindly shrub (broom-like). Stems Indumentum glabrous, Pustules or glands absent, Striation (stems ribbed) 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 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 70-150. 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) 30-40, Arrangement pinnately arranged. Terminal leaflet Presence absent, Stalk sessile (?) or stalked (?). Indumentum Presence glabrous. Stipules Presence present but early deciduous ( only visible on youngest leaves ), Glands without glands, Ribs ribless. Length Stipule length 5. Bracteoles Presence present but early deciduous, Indumentum glabrous, Striation not striate. Length Bracteole length 2-3.5. Pedicel Presence present, Indumentum glabrous. Length Pedicel length 7-9. Calyx Pustules or glands absent, Ribs ribbed, Enlarged in fruit not accrescent. Length Calyx length 5-7. Indumentum Presence glabrous. Corolla Colour patterning uniformly coloured, Colour (when uniformly coloured) yellow, Petal claws ( the narrow base of the petals present. Length Corolla length 18-20. Indumentum Presence absent. Standard Indumentum glabrous, Auricles not auriculate. Length Standard length 18-20. Wings Auricles not auriculate. Length Wing length 13-15. Keel Auricles not auriculate, Indumentum glabrous, Beak not beaked. Length Keel length 16-20. 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. Length Filament length NaN (?). Ovary Placement stipitate. Indumentum Presence glabrous. Style Indumentum glabrous, Bearded ( with a tuft of hairs at apex ) not bearded, Apex terete. Length Style length 13-20. Fruit Type dehiscent (a pod or follicle), Constriction not constricted between the seeds, Compression flat or compressed, Placement stipitate, Beak beaked. Length Fruit length 130-200. Width Fruit width 4-5. Indumentum Presence glabrous. Flowering time April, May or June. Distribution Botanical Province Northern, IBRA Bioregion Northern Kimberley, Victoria Bonaparte, Central Kimberley, Ord-Victorian-Plain or Dampierland.