焰序山龙眼 yan xu shan long yan

Trees 8-10 m tall. Young branchlets rust-colored tomentose, soon glabrescent. Leaves alternate or crowded apically on twigs; petiole 2.5-3 cm, pilose; leaf blade obovate-oblong, sometimes broadly oblanceolate, 32-50 × 9-16 cm, papery, base cuneate and decurrent into petiole, abaxially pilose along midvein, adaxially glabrescent, margin remotely serrulate, apex shortly acuminate, rarely obtuse; secondary veins 11-19 on each side of midvein, abaxially raised. Inflorescences ramiflorous, 20-30 cm; rachis 2.5-3 mm in diam.; bracts of flower pairs narrowly triangular, ca. 1.5 mm; floral bracts lanceolate, ca. 0.5 mm. Pedicels 4-5 mm, basally connate. Perianth yellowish, 2-2.8 cm, pilose; limb ellipsoid, ca. 3 mm in diam. Anthers ca. 2.5 mm. Hypogynous glands connate into a crenate cup. Ovary glabrous. Fruit brown, ± globose, 2.5-4 cm in diam.; pericarp ca. 0.5 mm thick, leathery, roughish. Fl. Apr-Aug, fr. Sep-Mar.

Montane forests; 700-1600 m. Guangxi (Napo), S Yunnan [Myanmar].