Senna septemtrionalis (Viv.) H.S.Irwin & Barneby

Shrub to 2–(3) m high, not armed; twigs glabrous or sparsely hairy, finely ribbed, rounded. Lvs 1-paripinnate, usually glabrous or sparsely ciliate, sparsely hairy when young, petiolate; leaflets ovate-elliptic, usually acuminate, sometimes acute, entire, subsessile or shortly petiolulate, (30)–45–90–(110) mm long, in 3–4–(5) opposite pairs; protruding glands mostly present between each pair of leaflets; stipules deciduous. Infl. axillary, racemose, 6–12-flowered, < lvs; bracts and bracteoles ovate-triangular, caducous, 3–6 mm long. Calyx teeth very unequal, obtuse. Corolla golden yellow, c. 2 cm long; stamens 7; staminodes 3. Pod tardily dehiscent, glabrous, straight, terete, many-seeded, 5–10 cm long; seeds smooth, brown, 4–6 mm long.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: Dec.–Apr.