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Corolla in the mature bud 2·5–4·5 x as long as the calyx 2·5–3 mm. long, and rounded at the apex, white, outside glabrous, inside densely pilose on the lobes (of which the apex sometimes glabrous); tube very short, 0·5–0·7 x as long as the calyx, 0·5–0·7 mm. long; lobes oblong, 4–5 x as long as the tube, 1·7–2 x as long as wide, 2–2·5 x 1·1–1·5 mm., acute, spreading.
Inflorescence axillary, usually also in the axils of the apical leaves and therefore seemingly terminal, lax, many–flowered, shorter or longer than the leaves, 3–11 x 2·5–8 cm., 3–4 times branched.
Sepals free, equal, broadly ovate, about 1–1·5 times as long as wide, 0·7–1·2 x 0·7–1 mm., rounded at the apex, ciliate, outside glabrous or nearly so, inside glabrous, without colleters.
Branches not or obscurely lenticellate, medium to dark brown and not sulcate when dry; branchlets glabrous, usually slightly sulcate when dry, mostly darker than in S. mitis.
Stamens exserted; filaments about 1–1·5 x as long as the anthers, inserted at the mouth of the corolla tube; anthers orbicular or nearly so, 0·5–0·6 x 0·5 mm., glabrous.
Pistil glabrous, 1–1–1–2 mm. long; ovary depressed–globose or–ovoid, 0·7 x 0·7 mm., 1–celled; style short, 0–4–0–5 mm. long; stigma capitate.
Fruit small, globose or nearly so, 12 x 10–18 x 18 mm., one–seeded. Wall thin.
Seed flattened, ellipsoid, 8–9 x 6–7 x 3 mm., pubescent (?).
One basal placenta with 2–9 ovules.
Testa thin sticking to the pulp.
Trunk c. 45 cm. in diam.
Tree, 20–35 m. high.
Flowers 4–merous.
Bark thin.
