6(
5
).
Veins of lemma glabrous or minutely scabrous; lemma base without long hairs
7
(Hitchcock 1951)
(Gould 1975)
6.
Veins of lemma pubescent (occasionally puberulent) to long hairy or lemma base with long hairs
8
(Hitchcock 1951)
(Gould
1975)