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Stylosanthes guianensis (Aubl.) Sw. var. guianensis Family Fabaceae
Subfamily Faboideae
Stylosanthes guianensis var. guianensis (Aubl.) Sw. APNI*

Description: Semi-erect to erect perennial shrub up to 1 m high. Stem often viscid varying in indumentum from nearly glabrous to densely pilose, often with bristles.

Leaves with varying indumentum as for stems. Leaflets elliptic to lanceolate, not more than 8 times longer than wide, 5–45 mm long, 2–20 mm wide. Petioles 1–12 mm long. Sheath of stipules 2–15 mm long, the teeth 2–10 mm long.

Inflorescence terminal or axillary, from 1–40-flowered, each with a unifoliate outer bract, the sheath 3–7 mm long, one outer bracteole 2.5–5.5 mm long, one inner bracteole 2–4.5 mm long, axis rudiment absent. Calyx tube 4–8 mm long, lobes 3–5 mm long. Standard yellow to orange, often stripped black, 4–8 mm long, 3–5 mm wide; wings and keel petals 3.5–5 mm long.

Fruit a pod 2–3 mm long, 1.5–2.5 mm wide, smooth, often dark coloured. Beak minute, 0.1–0.8 mm long, strongly inflexed. Seeds pale brown or purple.


Flowering: Flowers most of the year.

Distribution and occurrence: Native to Central America. Naturalised north of Grafton on the North Coast.

Growing in pasture and along roadsides.
NSW subdivisions: *NC
AVH map***

Text by Louisa Murray
Taxon concept: 't Mannetje, L. (1997) A Revision of Varieties of Stylosanthes guianensis (Aubl.) Sw. Aust. J. Bot. 25, 347-62.


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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