TABLE 1 in A new species of Platanthera (Orchidaceae, Orchideae) from southeast of Xizang, China

TABLE 1. Morphological characters of P. medogensis and its relatives.
CharacterP. medogensisP. bakerianaP. chiloglossaspurslightly longer than ovarymore than twice as long as the ovarylonger than ovarycallitwo, horn-like at the base of lipabsentabsentpollinialong-obovoidlong obovateellipsoidcaudiclesslender, longlonglongviscidialinearlinearnarrowly oblongstaminodetwo, sphericaltwo, small, nearly semicirculartwo, rectangular, smallstigmatwo, slightly protruding, located below the rostellum, positioned behind the spur openingone, prominent, protruding, horizontally elliptical, two deep clefts on the upper part, slightly fused and forming a saddle shape at the base, located in the base of the lip and at the front of spur openingtwo, stigma lobes separate, raised, elliptic, large, extending on either side of spur opening

表1 墨脱兰（P. medogensis）及其近缘类群的形态性状
| 形态性状 | P. medogensis | P. bakeriana | P. chiloglossa |
|-------------------------|---------------------------------------|---------------------------------------|-------------------------------------|
| 距（spur） | 略长于子房 | 长度为子房的2倍以上 | 长于子房 |
| 胼胝体（callus） | 2枚，着生于唇瓣基部，呈角状 | 无 | 无 |
| 花粉团（pollinium） | 长倒卵球形 | 长倒卵形 | 椭圆形 |
| 花粉团柄（caudiculum） | 纤细且较长 | 较长 | 较长 |
| 粘盘（viscidium） | 线形 | 线形 | 狭矩圆形 |
| 退化雄蕊（staminode） | 2枚，球形 | 2枚，细小，近半圆形 | 2枚，细小，呈长方形 |
| 柱头（stigma） | 2枚，稍凸出，位于蕊喙（rostellum）下方、距开口后方 | 1枚，显著凸出，横椭圆形，上部具2深凹，基部稍愈合形成马鞍形，位于唇瓣基部、距开口前方 | 2枚，柱头裂片分离、隆起，呈椭圆形，较大，延伸至距开口两侧 |