《中国植物志》|| 棕榈科 PALMAE ||桄榔属 Arenga Labill. nom. conserv. ||小花枕榔 Arenga micrantha C. F. Wei

2．小花枕榔（植物分类学报）
Arenga micrantha C. F. Wei in Act. Phytotax. Sin. 26:404-405. t. L. 1988.
小乔木，高3-8米。叶羽状全裂，长达3米；羽片2裂，顶生的较大，楔形，侧生的狭长圆形，长30-36厘米甚至更长，宽3.5-4厘米，先端急尖，基部稍狭，不等侧，外侧较宽，下延成一耳垂，顶端和中部以上边缘啮蚀状，上面深绿色，背面灰色；中脉粗壮，上面微凸，背面高隆起，被褐色鳞秕，侧脉多数，纤细，两面微凸；叶轴三角形，被棕褐色鳞秕；叶柄近圆形，长约1米。雄花序狭圆锥形，长0.8-1米，分枝多而纤细，成2-4列排列于花序轴上，下部的较长，长约17厘米，往顶部渐变短，最顶端的长约5厘米；花小，长圆形，长4.5-5.5毫米，萼片3，分离，宽圆形，长约2毫米，宽2.5-3毫米，覆瓦状排列；花瓣3，黄色，倒披针形或倒卵形，稍不等大，革质；雄蕊9-23枚，花丝短，基部稍合生；花药长圆形，长2.7-3.2毫米，先端尖，药室纵裂。雌花和果实未见。花期8月。
产我国西藏墨脱（模式标本产地）。生于海拔1000-1600米的森林中。

《Flora of China》|| Arecaceae || Arenga ||小花桄榔 Arenga micrantha

4. Arenga micrantha C. F. Wei, Acta Phytotax. Sin. 26: 404. 1988.

小花桄榔 xiao hua guang lang

Stems solitary, 2-8 m tall, to 15 cm in diam. Leaf petioles to 1 m; rachis to 2 m; pinnae many per side of rachis, linear-lanceolate, very briefly lobed along margins, with ears at bases, regularly arranged and spreading in same plane except for basal few pinnae; middle pinnae 30-36 cm, 3-4 cm wide at mid-point. Inflorescences 80-100 cm; male rachillae to 100, to 17 cm; male flowers 4-5.5 mm; sepals ca. 2 mm; petals ca. 5.5 mm; stamens 9-23; female inflorescences not known. Fruits not known.

Montane rain forests; 1400-2200 m. Xizang [Bhutan, India].