This subfamily has pooid flowers and membranaceus ligules. Genera are divided it two groups: 1) those having spikes, and 2) those having panicles.

1) Spikes

Agropyron - spikelets flat to rachis.

Elymus - spikelets sit in a 3 pronged cup.

Hordeum - spikelets in 3’s, all awned.

Lolium - spikelets edgewise to rachis.

Secale - spikelets in pairs, only lemmas awned.

Triticum (wheat) - single spikelet.
 

.2) Panicles

Agrostis - mostly in N. Florida.  Very basic flower having 2 glumes, lemma, palea, and grain.  About 1 - 2 ft. tall.

Aira (annual)/Deschampsia (perennial) - rare in florida.  “Agrostis” flowers, 4 ft. tall plant, spikelets longer than Agrostis.

Briza - triangular spikelet.

Holcus - hooked awn on glume, plant is bluish with white flowers.

Limnodea - rare in Florida.  Bent awn, only pooid with bent awn.

Melica - multiple florets 1 cm long.

Phalaris - looks like it has big lodicules that are actually reduced florets.

Poa - cobwebby hairs at base of spikelet, no awns.

Polypogon - 2 flowered “Agrostis” with long awns on glumes.

Sphenopholis - 1 glume very much inflated.

Vulpia (annual)/Festuca (perennial) - flower like Poa but elongated,  all awned in Florida