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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Poaceae
Perianth
segments 0–3, usually 2; flowers grouped into a characteristic
spikelet
(Fig. 48)
Poaceae
consider the other alternative
Spikelets
bisexual
(rarely unisexual, and if so, the spikelets similar and in the same
inflorescence
)
consider the other alternative
Spikelets not as in Group 13
consider the other alternative
Inflorescence
a solitary
spike
or
raceme
(Fig. 47)
choose this alternative
reject this alternative
Spikelets sunken in the
rhachis
and scarcely protruding beyond the contour of the
rhachis
until they open
choose this alternative
reject this alternative
Spikelets not sunken in the
rhachis
, although the bases alone may be slightly sunken