1	"Flowers not in spikelets, culms not striate"	2
1	"Flowers in spikelets; culms striate or not striate"	3
2	"Culm pith cavity circular; stomates scattered on culms; leaf sheaths striate; ovary 3-locular"	Lepyrodia
2	"Culm pith cavity angular; stomates arranged in horizontal bands on culms; leaf sheaths not striate; ovary 1-3-locular"	Sporadanthus
3	"Fruit indehiscent"	4
3	"Fruit dehiscent"	13
4	"Style 1"	5
4	"Styluli 2 or 3"	7
5	"Culms branching"	Desmocladus
5	"Culms simple"	6
6	"Culm sheaths more than 3"	Lepidobolus
6	"Culm sheaths lacking or culms with 1-3 persistent sheaths"	"Catacolea: Catacolea enodis"
7	"Leaf lamina reflexed from the sheath; culms not striate, glabrous, branched"	"Empodisma: Empodisma gracillimum"
7	"Lamina absent or not reflexed; culms mostly striate, glabrous or hairy, simple or branched"	8
8	"Female flowers subterranean except for styluli and stigmas which emerge above ground level; rhizome and culm bases sheathed by glossy scales; rhizomes long and slender"	Alexgeorgea
8	"Female flowers not subterranean; rhizome and culm bases sheathed by dull or glossy scales; rhizomes long or short or plant caespitose"	9
9	"Pericarp of nut woody"	Hypolaena
9	"Pericarp of nut thin-textured"	10
10	"Female flowers in distinct spikelets, spikelets not compound, with no bracts between the flower and subtending glume; flowers dorsiventrally flattened with winged lateral tepals"	Leptocarpus
10	"Female flowers in large clusters without distinct spikelet structure or in compound spikelets with small bracts between the flower and subtending glume; flowers not dorsiventrally flattened (sometimes laterally flattened)"	11
11	"Male flowers without a swollen base, female spikelets distinct or females crowded into large aggregations; culms simple or branched"	Meeboldina
11	"Male flowers with a swollen base; females with clusters of 3-5 flowers crowded into larger aggregations; culms simple below the inflorescence"	12
12	"Fruiting perianth with awns or slender tepals much longer than the fruit"	Chaetanthus
12	"Fruiting perianth less than 2 times as long as fruit"	"Apodasmia: Apodasmia ceramophila"
13	"Chlorenchyma not interrupted by pillar cells, girders or enlarged epidermal cells; culm usually not striate"	Chordifex
13	"Chlorenchyma interrupted by pillar cells, girders or enlarged epidermal cells; culm usually striate"	14
14	"Female spikelets with 1 flower"	15
14	"Female spikelets with more than 1 flower"	16
15	"Culms dimorphic with fertile culms erect but sterile culms more branched and flexuose; style-branches 2; plants without common and conspicuous galls"	Loxocarya
15	"Culms all much branched; style-branches mostly 3; commonly with large galls that resemble much enlarged spikelets"	"Taraxis: Taraxis grossa"
16	"Female spikelet structure not conspicuous, the glumes scarcely overlapping, not forming a compact spikelet; culms repeatedly branched"	"Tyrbastes: Tyrbastes glaucescens"
16	"Female spikelet structure conspicuous (multi-glumed spikelets with overlapping glumes), culms simple or branched"	17
17	"Culms flattened"	18
17	"Culms terete"	19
18	"Ovary 2-locular; styluli 2; seed surface of rhombic cells in longitudinal lines"	Tremulina
18	"Ovary 3-locular; styluli 3; seed surface of subangular or slightly lobed cells in an irregular pattern"	Platychorda
19	"Male and female spikelets more than 10 mm long"	20
19	"Spikelets less than 10 mm long"	21
20	"Spikelets ovoid, more than 3 mm dim.; glumes rigid and black"	"Melanostachya: Melanostachya ustulata"
20	"Spikelets cylindrical, less than 3 mm diam; glumes scarious-membranous"	"Dielsia: Dielsia stenostachya"
21	"Chlorenchyma interrupted by enlarged epidermal cells; male spikelets pendulous and anthers not exserted"	"Cytogonidium: Cytogonidium leptocarpoides"
21	"Chlorenchyma interrupted by pillar cells; (in all except C. microcodon) male spikelets erect and anthers exserted"	Chordifex