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Electronic Flora of South Australia species Fact Sheet

Swainsona unifoliata

Citation: F. Muell., Fragm. Phyt. Aust. 8:226 (1874).

Synonymy: Not Applicable

Common name: None

Description:
Erect or ascending perennial woody herb, indumentum of even fine light-coloured short basifixed hairs; stems branching, to 15-30 cm high; leaves unifoliolate or 3-foliolate when lateral leaflets developed below the much larger terminal leaflet, on petioles 5-20 (or more) mm long; leaflets obovate or narrow-obovate, 5-25 x 3-15 mm, commonly notched, more densely pubescent underneath; stipules ovate-acute, 3-8 mm long, leafy.

Flowers 6-9 mm long, on an up to 3 mm long pedicel deflexed in fruit, in 5-12- or more flowered racemes, evenly spaced on the 4-10 cm long peduncle; bract triangular-lanceolate, 1.5-3 mm long, leafy; bracteoles minute, filiform, to 1 mm long; calyx 3.5-5 mm long, sparsely but evenly pubescent with white appressed hairs; teeth triangular-lanceolate, shorter than the tube; petals purple; standard suborbicular, notched, as broad as long, narrowed sharply into the claw, c. 2 mm long, without any calli or thickenings; wings shorter than the other petals, oblong-ovate, auriculate, on a long claw; keel semicircular, obtuse, with a wide auricle, on a long claw, without any pouches or folds; ovary sessile, fusiform, pubescent with densely and closely appressed white hairs, tapering int6 a slender style; style shortly and sparsely bearded throughout, with a short inflexed tip and distinct hair-tuft behind the stigma.

Pod oblong-ellipsoid to cylindrical, 10-25 x 3-4 mm, with a short upturned beak and a broad and deep suture groove, the walls firm, sparsely pubescent or with short scattered hairs, several-seeded; seed obliquely reniform, to 1 mm long, compressed, brown, smooth, with a few long hairs.

image of FSA2_Swainsona_uni.jpg
Image source: fig. 341B in J.P. Jessop and H.R. Toelken Ed. 1986. Flora of South Australia (4th edn).

Distribution:    W.Aust.; N.T. (south of 23).

Conservation status: native

Flowering time: spring.


SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia

Biology: Salt tolerant.

Author: Not yet available


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