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Small shrub, 2–5 m tall; spines present or absent, patent or rarely recurved, frequently developed into lateral branches; brachyblasts between spines and leaf scars not recorded; young branches with grey or light brown bark.
Flowers 5(6)-merous, borne in one axil of penultimate node of lateral branches in 1–2(3)-flowered peduncles; peduncles 2–8 mm long; pedicels up to 2 mm long; bracteoles 2–4.5 mm long, ovate, acuminate, ciliate.
Corolla white; tube 2–4 cm long, covered with short appressed hairs outside; lobes 2–2.8 × 0.9–1.2 cm, elliptic to broadly elliptic, acute or sometimes acuminate, with short appressed hairs on both surfaces.
Calyx tube 4 mm long glabrous or pubescent; limb 5–8 mm long, divided into ciliate teeth near apex or rarely with linear teeth 5 mm long, glabrous outside, pubescent for most of length inside.
Fruit 2.5 × 1.1–1.2 cm, ellipsoid or fusiform; calyx limb persistent.
Seeds 2.25 × 1.5 × 0.5–1 mm, ± oval, flattened, reddish-brown.
Pollen presenter c. 5 mm, apex level with corolla throat.
Style slightly shorter than corolla tube.
