Abstract: Species T.wattii (C.B. Clarke ) Hook. f. affinis sed tubo perianthii intus prope aperturam laminis tenuibus carnosis margine repando-dentatis prae-dito; lobis perianthii elliptico-lanceolatis vel elliptico-ovatis, apice acuminatis vel obtusis; bracteis brevissimis 6- 8 mm longis; spica apice ebracteata; pedunculo 1 cm longo, 1-3-bracteato praedito; foliis brevioribus angustioribusque differt. Rhizoma repens cylindricum gracile leviter curvatum 24-32 cm longum 2-4 mm diam. flavo-brunneum. Folia 5-6 chartacea vel subcoriacea, elliptica vel ovata 5-6.5 cm longa 2.5-3.5 cm lata, apice acuminata, basi cuneata vel late cuneata, margine integra, utrinque glabra, petiolo circ, 2.5 cm longo vel brevissimo, basi dilatato et vaginato; vaginae squamiformes 4-6.

Key words: new species, tupistra, emeishan

摘要： 匍匐根状茎，细圆柱形，稍弯曲，长24一32厘米，直径2一4毫米，黄褐色。叶5—6枚，纸质或近革质，椭圆形或卵形，长5—6.5厘米，宽2.5—3.5厘米，先端渐尖，基部楔形或宽楔形，边缘全缘，两面光滑，一叶柄长约2.5厘米或更短，基部扩大呈状；鞘叶4—6枚。穗状花序侧生，顶端不聚集无花苞片，仅具6一9朵花；总花梗长约1厘米，具有1一3苞片；花苞片椭圆状卵形或椭圆状披针形，长6—8毫米，宽约2.5毫米，膜质，先端渐尖。

关键词: 峨眉山, 开口箭属, 新种