Triticeae: Answers to key questions leading to this tribe. 

	Mature inflorescence, if breaking into units, then the units not as below; NOT [Mature inflorescence breaking into spikelet units consisting of a sessile fertile spikelet, a hairy pedicel with or without a sterile spikelet at tip, and a hairy rachis joint, all arising at the same point (a node) in specialized panicle branches called rames]
	Spikelets not as below; sterile florets if present, either located distal to the fertile floret(s) on the rachilla or paired and attached at the base of a single fertile floret, not paired with the upper glume as below; lemma and palea variously textured, enclosing the flower or not; disarticulation usually above the glumes; NOT [Spikelets usually dorsally compressed, appearing 1-flowered but containing 1 fertile floret and 1 sterile floret, the latter attached to the base of fertile floret opposite the upper glume, resembling the upper glume, and together with the upper glume enveloping the fertile floret; lower glumes minute (sometimes absent) to 3/4 as long as upper glumes and typically wrapping most of the way around the pedicel at base; fertile floret seed-like with chartaceous-indurate lemma and palea enclosing flower and fruit; disarticulation below the glumes with rare exceptions]
	Spikelets 1 to many-flowered, subtended by a pair of glumes (only 1 on lateral spikelets in Lolium); palea margins enclosed or not; plants of dry or wet habitats; NOT [Spikelets 1-flowered, lacking glumes; margins of the palea tightly enclosed by the lemma margins on female or perfect florets; plants of wetlands, often emergent aquatic]
	Inflorescence a terminal spike with sessile or subsessile spikelets attached broadside at nodes on opposite sides of the rachis; NOT [Inflorescence not as above; if a terminal spike, then the lateral spikelets attached edgewise to the rachis with inner (upper) glume wanting (as in Lolium)]

Psathyrostachys: Answers to key questions leading to this genus.

	Spikelets 2 or more per node, occasionally 1 at some nodes; NOT [Spikelets 1 per node, occasionally 2 at some nodes]
	Spikelets 2-7 per node with 1-7 (9) florets per spikelet; if spikelets 3 per node, then some spikelets with more than 1 floret; NOT [Spikelets 3 per node with 1 floret per spikelet; florets in central spikelet always fertile, those in the 2 lateral spikelets sterile and greatly reduced in plants that disarticulate at rachis nodes but may be fertile in plants with a continuous rachis]
	Lemmas unawned or with awns up to 4 mm long; glumes not distinctly bowed out at base; NOT [Lemmas awned, the awns usually (5) 8-120 mm long, shorter (to 3 (5) mm) in plants with glumes distinctly bowed out (as in E. curvatus)]
	Spikelets sessile, 1-2 (3)-flowered; glumes not overlapping at base; rachis internodes 2-4 mm long; glumes 3-6 (7) mm long (in ours), ± equal; disarticulation above the glumes, or at the rachis nodes late in maturity; NOT [Spikelets sessile or subsessile, usually 3-7 (9)-flowered; if 2-flowered, then glumes overlapping at base concealing the base of the lowest floret; rachis internodes 4-10 mm long; glumes (5) 7 mm long or longer, if shorter, then distinctly unequal in length within a pair; disarticulation above the glumes, not at the rachis nodes]