中文名（Chinese Name）：水东哥
学名（Scientific Name）：Saurauia tristyla DC.
英文名（English Common Name）：
别名（Chinese Common Name）：白饭树、米花树
异名（Synonym）：Saurauia tristyla var. hekouensis C. F. Liang et Y. S. Wang；Saurauia tristyla var. oldhamii Finet et Gagnep.；Saurauia oldhamii Hemsl.
科属（Family & Genus）：猕猴桃科（Actinidiaceae）水东哥属
形态特征（Description）：灌木或小乔木，高3-6米，稀达12米；小枝无毛或被绒毛，被爪甲状鳞片或钻状刺毛。叶纸质或薄革质，倒卵状椭圆形、倒卵形、长卵形、稀阔椭圆形，长10-28厘米，宽4-11厘米，顶端短渐尖至尾状渐尖，基部楔形，稀钝，叶缘具刺状锯齿，稀为细锯齿，侧脉8-20对，两面中、侧脉具钻状刺毛或爪甲状鳞片，腹面侧脉内具1-3行偃伏刺毛或无；叶柄具钻状刺毛，有绒毛或否。花序聚伞式，1-4枚簇生于叶腋或老枝落叶叶腋，被毛和鳞片，长1-5厘米，分枝处具苞片2-3枚，苞片卵形，花柄基部具2枚近对生小苞片；小苞片披针形或卵形，长1-5毫米; 花粉红色或白色，小，直径7-16毫米；萼片阔卵形或椭圆形，长3-4毫米；花瓣卵形，长8毫米，顶部反卷；雄蕊25-34枚；子房卵形或球形，无毛，花柱3-4，稀5，中部以下合生。果球形，白色，绿色或淡黄色，直径6-10毫米。
分布（Distribution）：产广西、云南、贵州、广东。印度、马来西亚也有分布。
用途（Use）：
引自中国植物志英文版FOC Vol. 12 Page 356, 359      
Saurauia tristyla Candolle, Mém. Soc. Phys. Genève. 1: 423. 1822.
水东哥 shui dong ge| Actinidiaceae  | Saurauia
Saurauia oldhamii Hemsley; S. tristyla var. hekouensis C. F. Liang & Y. S. Wang; S. tristyla var. oldhamii (Hemsley) Finet & Gagnepain.
Small trees or shrubs, 3-6(-12) m tall. Branchlets tomentose to glabrescent, with unguiculate hairs or subulate scales. Petiole tomentose or not, with unguiculate hairs or subulate scales; leaf blade obovate to broadly elliptic-obovate, 10-28 × 4-11 cm, papery, both surfaces sparsely pubescent with appressed setose to unguiculate hairs on midvein and lateral veins, with sparse and appressed setose hairs especially on veins adaxially, lateral veins 8-20 pairs, base cuneate to broadly so, margin setose-serrate, apex shortly acuminate to caudate. Inflorescences 1-4-fascicled, axillary, 1-5 cm, hairy and scaly, 1-3-flowered; bracts 2 or 3 at base of branches, ovate; bracteoles 2, nearly opposite at base of pedicel, 1-5 mm. Flowers pink to white, 0.7-1.6 cm in diam. Sepals broadly ovate to elliptic, 3-4 mm. Petals ovate, ca. 8 mm, recurved at apex. Stamens 25-34. Ovary ovoid to globose; styles 3 or 4(or 5), connate below middle. Fruit green to white to pale yellow, globose, 6-10 mm in diam. Fl. Mar-Jul, fr. Aug-Dec.
Broad-leaved forests, sparse mountain forests, thickets, valleys; 100-1700 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Sichuan, Taiwan, S Yunnan [India, Malaysia, Nepal, Thailand].

（责任编辑：徐晔春）