pike
=Rye Grass, Lolium perenne.=

28b. Spikelets with their sides toward the axis of the spike
=Quack Grass, Agropyron repens.=

29a. Glumes longer than the lemmas
=Oats, Avena sativa.=

29b. Glumes shorter than the lemmas --30.

30a. Axis of the spikelet beset with conspicuous long hairs about
equaling the lemmas; tall marsh grass 1-4 m. high
=Reed, Phragmites communis.=

30b. Spikelets without conspicuous long hairs --31.

31a. Spikelets sessile or nearly so, forming crowded or spike-like
panicles --32.

31b. Spikelets distinctly panicled --33.

32a. Spikelets in dense one-sided clusters at the ends of the
panicle branches =Orchard Grass, Dactylis glomerata.=

32b. Spikelets in an erect spike-like cluster
=Prairie June-grass, Koeleria cristata.=

33a. Lemmas, exclusive of the awn when present, 8 mm. long or more --34.

33b. Lemmas, exclusive of the awn when present, 6 mm. long or less
--35.

34a. Awns on the lemmas 12 mm. long or more
=Brome-grass, Bromus tectorum.=

34b. Awns on the lemmas 8 mm. long or less, or none
=Cheat, Bromus secalinus.=

35a. Lemmas with 7 sharp conspicuous veins from base to apex
=Manna Grass, Glyceria nervata.=

35b. Lemmas with 3-5 inconspicuous veins --36.

36a. Spikelets with 5 flowers or more --37.

36b. Spikelets with 2-4 (rarely 5) flowers --40.

37a. Stems tufted and decumbent at base (Love Grass) --38.

37b. Stems erect (Fescue Grass) --39.

38a. Spikelets 1.5 mm. wide =Love Grass, Eragrostis pilosa.=

38b. Spikelets 3 mm. wide =Love Grass, Eragrostis megastachya.=

39a. Lemmas with conspicuous awns =Fescue Grass, Festuca octoflora.=

39b. Lemmas without awns =Fescue Grass, Festuca elatior.=

40a. Tufted annual grass =Spear Grass, Poa annua.=

40b. Perennials, with erect flowering stems --41.

41a. Stems round =Blue Grass, Poa pratensis.=

41b. Stems strongly flattened =Canadian Blue Grass, Poa compressa.=

CYPERACEAE, the Sedge Family