Common name: Arsenic Bush
Senna septemtrionalis (Viv.) H.S.Irwin & Barneby APNI* Synonyms: Senna x floribunda (Cav.) H.S.Irwin & Barneby APNI*
Cassia floribunda Cav. APNI*
Cassia laevigata Willd. APNI*
Description: Shrub 1–3 m high.
Leaves 6–8 cm long; glands between lowest pairs of leaflets, 3 or 4, erect; leaflets 3–5 pairs, ovate, the largest 4.5–7 cm long, 15–28 mm wide; petiole 15–35 mm long.
Peduncles 3–4 cm long; pedicels 10–13 mm long. Fertile stamens 6 or 7; 2 largest anthers 6 mm long, 2 longest filaments 8 mm long, central lower filament 2 mm long; 2 of 3 lower stamens with C-curved filaments almost at right angles to the plane of floral symmetry.
Pods cylindrical, 7–8 cm long, 7–12 mm diam., straw-coloured, irregular due to imperfect seed set.
Flowering: Flowers spring to autumn.
Distribution and occurrence: Cultivated, frequently naturalized in coastal districts in moist sclerophyll forest and disturbed rainforest; north from Tathra. Native of Mexico.
NSW subdivisions: *NC, *CC, *SC, *CT, *NWP, *LHI
Other Australian states: *Qld *Vic.
Text by B. Wiecek
Taxon concept: Randell, B.R. & Barlow, B.A. (1998)
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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