小叶黑面神

灌木，高达3米，多分枝；枝条纤细，圆柱状；节间短；全株均无毛。叶片膜质，二列，卵形、阔卵形或长椭圆形，长2-3.5厘米，宽0.8-2厘米，顶端钝至圆形，基部钝，上面绿色，下面粉绿色或苍白色；中脉和侧脉上面扁平，下面凸起，侧脉每边3-5条；叶柄长2-3毫米；托叶卵状三角形，长约1.5毫米。花小，绿色，单生或几朵组成总状花序；雄花：花梗纤细，长4-10毫米；萼片6，阔卵形，长约2毫米，顶端近截形；雄蕊3，合生呈柱状；雌花：花梗长3-4毫米；萼片与雄花的相同，但较短，长1-2毫米，结果时不增大；子房卵珠状，花柱短。蒴果卵珠状，顶端扁压状，直径5毫米，基部有宿存的花萼；果梗长3-4毫米。染色体基数x＝26。花期3-9月，果期5-12月。

分布：分布于印度、泰国、柬埔寨、越南、马来西亚和菲律宾等

生境：山地灌木丛中

海拔：产于福建、台湾、广东、广西、贵州和云南等省区，生于海拔150-1000米

Breynia vitis-idaea (Burm. f.) C. E. C. Fischer in Bull. Misc. Inf. Kew 1932: 65. 1932: Airy Shaw in Kew Bull. 26 (2): 227. 1972; P. T. Li in Acta Phytotax.Sin. 26: 61. 1988. ——Rhamnus vitisidaea Burm. f. Fl. Ind. 6-1768. ——Phyllanthus rhamnoides Willd. Sp. Pl. 4: 580. 1805. ——Breynia rhamnoides (Willd.) Muell. Arg. in DC. Prodr. 15 (2): 440. 1866; Hook. f. Fl. Brit. Ind. 5: 330. 1887: Craid in Bull. Misc. Inf. Kew 1911: 461. 1911, et 1912: 187. 1912; Merr. Enum. Philipp. Fl. Pl. 2: 404. 1923: Ridl. Fl. Malay Penins. 3: 218. 1924; Beille in Lec. Fl Gen. Indo-Chine 5: 636. 1927;陈嵘, 中国树木分类学630. 1937.——B. officinalis Hemsl. in Journ. Linn. Soc. 26: 427. 1894; Kanehira, Formos. Trees rev. ed. 332. 1936; H. Keng in Taiwania 6: 37. 1955; Li, Woody Fl. Taiwan 418. 1963; Hsieh in Li, Fl. Taiwan 3: 450. 1977: Liu, Ligneous Pl. Taiwan 410. 1976. ——B. accrescens Hayata in Journ. Coll. Sci. Tokyo 20: 22. 1904: Kanehira, Formos. Trees rev. ed. 332. 1936; H. Keng in Taiwania 6: 37. 1955; Li Woody Fl. Taiwan 418. 1963; Hsieh in Li, Fl. Taiwan 3: 450. 1977; C. E. Chang in Journ. Phytogeogr. Taxon. 29 (1): 10. 1981. ——B. stipitata Muell.-Arg. var. formosana Hayata in Journ. Coll. Sci. Univ. Toky 20: 23, tab. 2A, 2B. 1904. ——B. keithii Ridl. in Journ. Str. Br.Roy. As. Soc. 59: 174. 1911, et Flora 219. 1929. ——B. formosana (Hayata) Hayata, Gen. Ind. Fl. Formos. 65. 1916; Kanehira, Formos. Trees rev. ed. 332. 1936: H. Keng in Taiwania 6: 37. 1955: Li, Woody Fl. Taiwan 418. 1963; Liu, Ligneous Pl. Taiwan 410. 1976; Hsieh in Li, Fl. Taiwan 3: 450, Pl. 682. 1977. ——B. microcalyx Ridl. in Journ. Fed. Malaya States Mus. 10: 114. 1920.