Common name: Siratro
Macroptilium atropurpureum (DC.) Urb. APNI*
Description: Decumbent or twining perennial; stems 2–3 m long, pubescent.
Leaves 3-foliolate; leaflets ovate to rhombic, 2–7 cm long, 1.8–5 cm wide, lateral leaflets lobed at base on one or both sides, apex obtuse to ± acute, lower surface densely whitish pubescent; petiole 20–45 mm long; petiolules 2–4 mm long; stipules 3–5 mm long.
Racemes to c. 40 cm long; peduncle 10–30 cm long. Calyx 5–8 mm long. Corolla mostly 1.5–2 cm long, dark reddish black to purple.
Pod linear, 5–10 cm long, 3–5 mm wide, pubescent; seeds c. 12, reniform, c. 3 mm long.
Flowering: almost all year.
Distribution and occurrence: Naturalized in pasture and along roadsides; north from Sydney. Native of C & N Amer.
NSW subdivisions: *NC, *CC, *NWS, *CWS
Other Australian states: *Qld *N.T.
Text by C. Gardner
Taxon concept: Flora of NSW 2 (1991)
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.