禾本科狗牙根属分种检索表

1.穗状花序(2—)3—5(—6)枚,长2—5(—6)厘米;叶舌为一轮白色纤毛,植株具根茎。(1.狗牙根C. dactylon (L.) Pers.)
  2.小穗仅含两性小花1枚…………………………………1a.狗牙根  C. dactylon var. dactylon
  2.小穗含两性小花2枚,小穗轴在2小花之间有时可长达1毫米………………………………………………………………………………1b.双花狗牙根  C. dactylon var. biflorus Merino
1.穗状花序5—8枚,长6—10厘米;叶舌膜质,上缘撕裂状;植株不具根茎………………………………………………………………2.弯穗狗牙根  C. arcuatus J. S. Presl ex Presl

周二, 2013-08-13 14:17 -- zhanghr
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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith