J. Black, Trans. R. Soc. S. Aust. 51:380 (1927).
Synonymy: S. laxa R. Br. vat. rigida Benth., Fl. Aust. 2:224 (1864).
Common name: None
Shrub-like herb, glabrous or sparsely hoary with fine short basifixed hairs on the stems, leaves and calyces; stems branched, erect, 50-100 (or more) cm high, rigid, glabrous, faintly striate lengthwise, greyish-green; leaves 3-9 cm long, with 13-15 leaflets often caducous; leaflets oblong to narrow-oblong or obovate-emarginate, mostly 2-5 x 1-3 mm, rarely 7 x 5 mm, glabrous, the terminal leaflet the longest; stipules filiform to lanceolate or narrow-deltoid, 1-4 mm long, caducous with the leaves.
Flowers 9-15 mm long, on 2-3 mm long glabrous to pubescent pedicels, in 15-20-flowered racemes on a rhachis 15-40 cm long, crowded distally, widely spaced on the lower half; bract triangular 1-2 mm long, finally scarious, pubescent; bracteoles deltoid, 0.5-0,8 mm long, clasping the conical base of the calyx; calyx 3.5-5.5 mm long, glabrous or with a few hairs outside, teeth triangular to apiculate, to 1 mm long, pubescent inside, rarely outside, shortly ciliate; standard orbicular, c. 10 mm across, slightly notched, yellow, without calli but with a hollow convexity (sometimes very slightly thickened) above the claw on the inner surface, on a slender claw 2-4 mm long; wings oblong, brownish-purple distally, geniculate near the base of the slender 3-4 mm long claw, auriculate; keel semicircular, shortly and bluntly beaked, slightly turned to one side, yellow, distinctly auriculate above the 3-4 mm long claw, without pouches or folds; ovary stipitate, fusiform, flattened, glabrous, to 20-ovulate; style rigid, thickened at the base, twisted obliquely, grooved and very shortly incurved at the summit, bearded for its whole length, with hair-tufts behind the straight stigma.
Pod stipitate, ellipsoid, 10-20 x 6-9 mm, beaked, compressed, reticulate, glabrous, 1-5-seeded; seed cordiform, brown, smooth, if 1 it is c. 4 x c. 3 mm, if more then smaller.
Image source: fig. 339B in J.P. Jessop and H.R. Toelken Ed. 1986. Flora of South Australia (4th edn).|
Cunningham et al. (1982) Plants of western New South Wales, p. 420.
predominantly on sand dunes.
W.Aust.; N.T.; Qld; N.S.W..
Flowering time: May — Oct.
SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
Some specimens with larger leaflets approach S. laxa which has glabrous calyx teeth outside and inside without cilia and wings yellow.
Not yet available