1 "Lemmas villous on the keels and marginal veins for more than 1/3 the length of the lemmas; blades usually involute, the cauline and innovation blades similar" "Poa unilateralis subsp. pachypholis" 1 "Lemmas glabrous or the keels and marginal veins villous or puberulent for less than 1/5 the length of the lemmas; blades flat or folded, the cauline blades sometimes wider and thicker than the innovation blades" "Poa unilateralis subsp. unilateralis"