禾本科假拟沿沟草属分种检索表

1.颖披针形,与外稃等长或稍长;雄蕊3……………………2.藏假拟沿沟草P. tibeticum (Bor) E. Alexeev
1.颖长圆状披针形或卵状披针形,较外稃短;雄蕊2。……1.假拟沿沟草P. altaicum (Trin) Tzvel.
  2.叫片绿色,光滑,稀上面被稀疏的钝毛状物;圆锥花序紧缩,下部分枝开展;小穗长4毫米,常紫色;外稃长3.5—4毫米…………………………………………la.假拟沿沟草subsp. altaicum
  2.叶片灰绿色,两面或仅上面被钝的毛状物;圆锥花序狭窄,均直立;小穗长4.5—5.5毫米,常白绿色;外稃长4—5.5毫米……………1b.高山假拟沿沟草:subsp. leuculepis (Nevski ) Tzvel.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith