16. Grewia sessiliflora Gagnepain, Notul. Syst. (Paris). 1: 167. 1910.
无柄扁担杆 wu bing bian dan gan
Shrubs. Branches and branchlets softly yellow-brown tomentose. Petiole 1-3 mm; leaf blade triangular-lanceolate, 6-10 × 3-5 cm, abaxially densely softly yellow-brown tomentose, adaxially softly stellate tomentose, lateral basal veins to 1/2 as long as leaf blade, 7-13 mm from margin, lateral veins 3-4 pairs, base oblique, rounded or shallowly cordate, margin serrate, apex narrowly acuminate. Cymes 1 or 2 per leaf axil, 4-5 cm; peduncle 3-4 cm, tomentose. Bracts filiform, 7-8 mm, tomentose. Sepals lanceolate, 8-9 × ca. 1.5 mm, abaxially tomentose, adaxially glabrous. Petals 4-5 mm. Stamens slightly longer than petals. Ovary tomentose; style longer than stamens. Drupe 2-lobed, lobes globose, glossy, sparsely stellate hairy. Fl. Jun-Jul.
Secondary forests at low elevations. S Guangdong, Guangxi [Laos, N Thailand, N Vietnam].
The diagnostic features of this species include the triangular-lanceolate leaves covered with yellow-brown soft indumentum and the long cymes; at 4-5 cm, these are the longest cymes in the genus in China.