Styrax hwangiae

Diagnosis: — S tyrax hwangiae is similar to S. rugosus but differs by its longer petiole, paniculate or racemose inflorescence with more flowers, calyx abaxially tissue extend outward into many spires covered by many trichomes, flexuous longer filaments, and larger fruits with thicker pericarp. Evergreen shrubs or small trees, 2 – 14 m tall. Young branchlets yellowish brown-stellate-tomentose, older branchlets light black and glabrescent. Leaves alternate. Petiole 3 – 7 mm long, densely brown-stellate- tomentose. Leaf blades ovate-oblong or ovate, 3 – 15 × 2.0 – 6.4 cm, coriaceous, base broadly or narrowly cuneate, slightly oblique, margin slightly undulate and revolute, apex acute or acuminate, mucronate; adaxially rugose and sparsely covered with simple black stellate trichomes, sometimes subglabrous when old, abaxially greyish white-stellate-tomentose; secondary veins 4 – 6 on each side of midvein, tertiary veins parallel, secondary and tertiary veins adaxially sunken, abaxially raised. Fertile shoots (3 –) 6 – 12 (– 17) - flowered, (4 –) 5 – 10 (– 12) cm long. Inflorescences usually paniculate, rarely racemose, rachis yellowish green-stellate-tomentose intermixed with sparsely stalked trichomes; bracteoles positioned at various places along pedicel or at base of calyx, linear, 3 – 6 (– 10) mm long, densely grey-stellate- tomentose, intermixed with stalked trichomes. Pedicel 5 – 15 mm long, stellate-tomentose. Flowers 1.5 – 2.0 cm long. Calyx hemispheric, 7 – 10 × 7 – 12 mm, grey-stellate- tomentose throughout, calyx tissue extend outward into many spires covered by many trichomes; margin irregularly dentate, teeth unequal, 2 – 5 mm long, broadly deltoid, obtuse, densely stellatetomentose, sometimes with 1 or 2 acute apexes. Corolla white, widely campanulate, 1.2 – 1.5 × 1.4 – 2.3 cm, tube 3 – 5 mm long, lobes 5, elliptic- obovate, 1.0 – 1.5 × 0.6 – 1.1 cm, densely pale stellate-pubescent both sides, apex sharply acute. Stamens 10; filaments 11 – 12 mm long, flexuous at right angles at midpoint, densely white-stellate-tomentose, becoming glabrous distally; anthers connivent, awl-shaped, ca. 0.7 mm long, connectives extending beyond thecae, thecae densely stellate-pubescent. Style densely white-stellate-villous; ovary ovoid, apical portion pubescence. Fruit dehiscent by 2 or 3 valves from the base, ovoid, 1.3 – 1.6 × 0.8 – 1.1 cm, apex rounded or apiculate; pericarp dry, 0.5 – 1 mm thick, outside densely whitish stellate-tomentose, inside glabrous or sparsely grey-pubescent. Seeds brown, ovoid, sparsely or densely appressed-stellate-pubescent or lepidote.