Psoralea arborea Sims APNI*
Description: Large slender shrub to small tree, 3–5, sometimes up to 10 m tall. Stems greenish grey when young, becoming grey when old with scattered white lenticels. Stipules fused for part of their length, persistent.
Leaves with 7–9-leaflets, 25–30 mm long, 45 m wide, petiolate. Leaflets 30–45 mm long, 1–2 mm wide, glabresent above, wispily hairy below. Petiole 4–5 mm long, shorter on younger leaves, rachis 10–12 mm long.
Inflorescences well exerted from leaves. Flowers 10–19 mm long, long pedicellate, 2–3 per axil, deep blue to purple, strongly scented, axillary, each set subtended by a pinnate leaf; bracts a fused bifid cupulate structure situated at apex of a 11–35 mm long densely hairy pedicel.
Fruits 4–5 mm long, 2 mm wide. Seeds 3–4.5 mm long, 2 mm wide.
Flowering: Flowers June to December.
Distribution and occurrence: This species has become a serious invasive weed in some areas of Australia. Native of South Africa.
NSW subdivisions: *NC, *CC, *SC, *CT
Text by Louisa Murray
Taxon concept: Stirton, Stajsic & Bello (2014) Naturalised species of Psoralea. Muelleria 33: 97–107
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.