1. Dodecadenia grandiflora Nees in Wallich, Pl. Asiat. Rar. 2: 63. 1831.
单花木姜子 dan hua mu jiang zi
Evergreen trees, 10-15 m tall, ca. 30 cm d.b.h. Branchlets covered with dense brown pubescence or glabrous. Leaves alternate; petiole 8-10 mm, covered with pubescence; leaf blade oblong-lanceolate or oblong-oblanceolate, 5-10 × 2-3 cm, glabrous abaxially, along midrib pubescent adaxially, lateral veins 8-12 pairs, conspicuously reticulate-veined on both surfaces, base cuneate, apex acute or acuminate. Umbels 1-3-clustered in leaf axils, 1-flowered. Male flowers: perianth segments 6 in 2 whorls, outer ones broader, inner ones slightly narrow and pubescent outside; fertile stamens 12; filaments pubescent, of 3rd whorls each with 2 large glands at base, of 4th whorls with smaller glands; rudimentary pistil pubescent or glabrous. Female flowers: ovary pubescent or glabrous. Fruit ellipsoid, 10-12 × 7-9 mm, seated on discoid perianth tube; fruiting pedicel ca. 5 mm, stout.
Weed-tree forests in valleys, mixed forests of coniferous and deciduous broad-leaved trees, Tsuga forests; 2000-2600 m. W Sichuan, SE Xizang, Yunnan [Bhutan, India, Myanmar, Nepal].
Reviewer Colin Pendry (E) notes that among Nepalese specimens the distinction between var. grandiflora and var. griffithii is unclear. Both glabrous and tomentose twigs can be seen on the same branch in Nicolson 2661 (BM), and glabrous ovaries can be seen with tomentose twigs in Stainton 6181 (BM) and Proud s.n. (BM).
