4. Dodecadenia Nees in Wallich, Pl. Asiat. Rar. 2: 61, 63. 1831.
单花木姜子属 dan hua mu jiang zi shu
Authors: Puhua Huang, Jie Li, Xi-wen Li & Henk van der Werff
Evergreen trees, dioecious. Leaves alternate, pinninerved. Umbels solitary or clustered in axils of leaf, 1-flowered; peduncles absent or nearly absent; involucral bracts 4 or 5, imbricate. Flowers unisexual; perianth tube short; perianth segments 6 in 2 whorls, spreading, nearly equal. Male flowers: fertile stamens 12 in 4 whorls or 3 each; filaments of 1st and 2nd whorls eglandular, of 3rd and 4th whorls each with 2 glands at base; anthers all introrse, 4-celled; cells opening by lids; rudimentary ovary small. Female flowers: staminodes 12 in 4 whorls of 3 each, 1st and 2nd whorls eglandular, of 3rd and 4th whorls each with 2 glands at base; ovary superior; style elongated; stigma enlarged. Fruit seated on perianth tube.
One species: Bhutan, China, India, Myanmar, Nepal.