Uvariastrum insculptum Sprague & Hutch.

Tree or shrub to 4-7 (15) m high, d.b.h. 2.5-5 cm; old branches spreading, glabrous, bark brown-grey; young branches pubescent, hairs ca. 0.5-1 mm long, erect, brown; leaf buds elongated, pubescent, hairs ca. 1 mm long, appressed, light brown. Petioles 1-2(4) mm long, 1 mm in diameter; pubescent, hairs ca. 0.4-0.8 mm long, erect, red brown, persisting in older leaves; leaf lamina inserted on top, weakly grooved adaxially. Leaf lamina 6-14 cm long, 2-4 cm wide, length:width ratio 2.5-4, narrowly elliptic to elliptic or narrowly obovate to obovate, papyraceous to sub coriaceous, glabrous to very sparsely pubescent adaxially, sparsely pubescent quickly becoming glabrous abaxially; dark green adaxially; lighter green abaxially; base rounded to subcordate, apex acuminate, acumen 1-2 cm long; midrib pubescent in young leaves quickly becoming glabrous adaxially, hairs ca. 0.1 mm long, appressed, brown; densely to sparsely pubescent abaxially, hairs ca. 0.3 mm long, appressed, brown; secondary veins 8-12, straight to curving upwards, clearly anatomizing towards margins, glabrous, imprinted adaxially; sparsely pubescent, hairs ca. 0.3 mm long, appressed, brown, clearly visible abaxially. Rhipidia 1-2, on leafy branches, and one report of cauliflory. Flowering pedicels 0.8-1.5 cm long, 1-2 mm in diameter, densely pubescent, hairs 0.2-0.5 mm long, appressed, light brown. Bracts up to 3, ca. 4 mm long, 3-4 mm wide, basal, densely pubescent outside, hairs ca. 0.5 mm long, light to darker brown, glabrous inside. Sepals 0.7-1.5 cm long, 5-8 mm wide, length:width ratio 1.4-2.5, ovate to broadly ovate, base truncate, apex acute, margins slightly folded; densely pubescent, hairs ca. 0.5 mm long, appressed, light brown when dried; horizontally spreading in mature flowers, falling when in fruit, green to light green or pale yellow with darker margins in fresh flowers. Outer petals 2.3-3.5 cm long, 0.5-1 cm wide, length:width ratio 2-4, ovate to narrowly ovate, base narrowing, apex acute, densely pubescent to tomentose outside, hairs ca. 0.1 mm long, appressed, light brown, more densely pubescent along central vein, sparsely pubescent to tomentose inside, hairs ca. 0.1 mm long, appressed, light brown; pale yellow to white in fresh flowers. Inner petals smaller than outer ones, 1-2 cm long, 0.6-1 cm wide, length:width ratio 2-4, ovate to narrowly ovate, base narrowing, apex acute, pubescence and color same as outer petals; pale yellow to white in fresh flowers. Stamens 2-2.5 mm long, connective discoid, ca. 0.5 mm in diameter, densely pubescent; bright red. Carpels 6-7, falling off before stamens, 2-3 mm long, ca. 1 mm in diameter, densely pubescent, hairs 0.7-1 mm long, apprressed upwards, light brown; stigma ca. 1.5 mm in diameter, bilobed, glabrous, yellow to creamy; ovules 19-26, biseriate. Fruiting pedicels 1-2 cm long, 2-5 mm in diameter, woody, densely to sparsely pubescent, hairs ca. 0.5 mm long, appressed, light brown. Monocarps 2-8, 3-6 cm long, 1-2 cm in diameter, oblong to narrowly oblong, straight or bending, longitudinally ribbed, ribs ca. 4-6, resembling that of a peanut, densely pubescent all over, more so along ribs, hairs ca. 0.2 mm long, light brown; stipe 2-6 mm long, 2-5 mm in diameter; rostre 2-4 mm long. Seeds, ca. 20 per monocarp, 1-1.5 cm long, 0.7-0.9 cm wide, ellipsoid flat, 3-5 mm in depth, testa dark brown; raphe raised, slightly darker brown; hilum 2-4 mm long, 1-1.5 mm wide, narrowly elliptic to narrowly ovate.