1	"Spikelets 2-4 at each middle rachis node"	2
1	"Spikelets 1 at all rachis nodes"	3
2	"Spikes nodding"	"Campeiostachys nutans"
2	"Spikes erect"	"Campeiostachys dahurica"
3	"Glumes unawned; lemma tips truncate, 3-toothed"	"Campeiostachys tridentata"
3	"Glumes awned, pointed, or mucronate; lemma tips toothless"	4
4	"Spikes erect or slightly curved"	5
4	"Spikes nodding"	7
5	"Spikes appearing somewhat 1-sided; glumes with 5-7(-9) veins; lemma backs hairy"	"Campeiostachys drobovii"
5	"Spikes not appearing 1-sided; glumes with 3-5 veins; lemma backs glabrous"	6
6	"Lemma awns 20-30 mm ling; paleal keels ciliate on the distal 2/3rds; anthers about 2.5 mm long"	"Campeiostachys humidora"
6	"Lemma awns 15-23 mm long; paleal keels ciliate on the distal 1/2; anthers about 1.5 mm long"	"Campeiostachys × mayebarana"
7	"Paleal keels winged"	"Campeiostachys tsukushiensis"
7	"Paleal keels not winged"	8
8	"Spikes not appearing 1-sided; rachis internodes 12-20 mm long"	"Campeiostachys himalayana"
8	"Spikes appearing somewhat or clearly 1-sided; rachis internodes 3-10 mm long"	9
9	"Leaf sheaths glabrous; spikelets 12-15 mm long, with 2-3 florets"	10
9	"Leaf sheaths hairy; spikelets 8-12 mm long, with 3-5 florets"	12
10	"Glumes and lemmas glabrous, awns to 40 mm long"	"Campeiostachys aristiglumis var. liantha"
10	"Glume veins scabrous; lemma backs setulose; lemma awns 20-29 mm long"	11
11	"Leaf blades 4-5 mm wide, upper surfaces scabrous, lower surfaces smooth and glabrous"	"Campeiostachys aristiglumis var. aristiglumis"
11	"Leaf blades about 2 mm wide, both surfaces densely hairy"	"Campeiostachys aristiglumis var. hirsuta"
12	"Leaf blades sparsely villous on upper surfaes"	"Campeiostachys schrenkiana var. schrenkiana"
12	"Leaf blades densely pubescent on both surfaces"	"Campeiostachys schrenkiana var. pamirica"