1	"Spikelets, singly or in clusters, subtended by a 1 or more deciduous bristles or several glumelike bracts"	2
1	"Spikelets not falling with subtending bristles or spines; subtending bristles, if present, persistent on the branches"	3
2	"Upper lemmas dorsally compressed, the styles emerging terminally"	"Tricholaena {Tricholaena teneriffae}"
2	"Upper lemmas laterally compressed, the styles emerging laterally"	Melinis
3	"Upper lemmas coriaceous to bony at maturity, with narrow inrolled margins"	4
3	"Upper lemmas usually cartilaginous to chartaceous at maturity, rarely, hyaline, always with flat, usually hyaline margins"	15
4	"Spikelets subtended by persistent bristles or the branch axes prolonged into to a subulate point"	5
4	"Spikelets not subtended by bristles; branch axes not prolonged into a subulate point"	7
5	"Lower lemmas sulcate; keels of the lower paleas becoming indurate"	"Holcolemma {Holcolemma inaequale}"
5	"Lower lemmas not sulcate; keels of lower paleas not becoming indurate"	6
6	"Inflorescences paniculate, all or most spikelets subtended by a bristles"	Setaria
6	"Inflorescences of spikelike branches, only the terminal spikelets subtended by a bristle"	Paspalidium
7	"Pedicels terminating in a globular bead"	Eriochloa
7	"Pedicels not terminating in a globular bead"	8
8	"Inflorescences paniculate; glumes and lemmas unawned"	9
8	"Inflorescences of 1-sided spikelike branches, the spikelets usually single or paired but sometimes in irregular clusters or on short, secondary branches; glumes and lemmas awned"	11
9	"Lemmas of upper florets transversely rugose; panicle branches verticillate at lowest nodes"	Megathyrsus
9	"Lemmas of upper florets smooth; panicle branches not verticillate"	10
10	"Panicles and upper portion of culms pilose with slender clavellate hairs"	"Dichanthelium {Dichanthelium deustum}"
10	"Panicles glabrous or hairy but hairs not clavellate"	Panicum
11	"Glumes awned"	12
11	"Glumes unawned, sometimes mucronate"	13
12	"Upper lemmas unawned"	Echinochloa
12	"Upper lemmas awned"	"Alloteropsis {Alloteropsis cimicina}"
13	"Upper lemmas rugose or verrucose; panicle branches sometimes verticillate"	Urochloa
13	"Upper lemmas smooth; panicle branches never verticillate"	14
14	"All or upper leaves without ligules; spikelets plano-convex"	Echinochloa
14	"All leaves with ligules, these composed of a ciliate membrane, the cilia equal to or longer than the membranos base"	"Moorochloa {Moorochloa eruciformis}"
15	"Spikelets dorsally compressed; inflorescences of spikelike branches"	16
15	"Spikelets laterally compressed; inflorescences paniculate"	17
16	"Inflorescence branches persistent"	Digitaria
16	"Inflorescence branches deciduous"	"Taeniorhachis {Taeniorhachis repens}"
17	"Involucres composed of several glumaceous bracts"	Anthephora
17	"Involucres composed of bristles or spines"	Cenchrus