![](../../../_themes/botany/blbull1.gif) | Triticeae: Answers to key questions
leading to this tribe.
![](../../../_themes/botany/blbull2.gif) | 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] |
![](../../../_themes/botany/blbull2.gif) | 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] |
![](../../../_themes/botany/blbull2.gif) | 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] |
![](../../../_themes/botany/blbull2.gif) | 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)]
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![](../../../_themes/botany/blbull1.gif) | Pascopyrum: Answers to key questions
leading to this genus.
![](../../../_themes/botany/blbull2.gif) | Spikelets 1 per node, occasionally 2 at some nodes; NOT [Spikelets 2 or more per node, occasionally 1 at some
nodes] |
![](../../../_themes/botany/blbull2.gif) | Spikes not pectinate with spikelets not arranged as below; spikelets
usually appressed to ascending, sometimes somewhat divergent; glumes
usually flat at base, sometimes keeled towards tip; NOT [Spikes usually
pectinate with spikelets closely-set, regularly-spaced and parallel like
the teeth of a comb; spikelets divergent at angles of 30° to 90° from
the rachis at maturity; glume keels prominent to base] |
![](../../../_themes/botany/blbull2.gif) | Introduced or native perennials;
NOT [Introduced annuals rarely found outside cultivation or
plantings] |
![](../../../_themes/botany/blbull2.gif) | Glumes and lemmas not particularly thick-textured and rigid, the
apices acute, acuminate or awned; plants native or introduced, uncommon
to very common in SK; NOT [Glumes and lemmas distinctly thick-textured,
rigid and usually blunt- tipped (glumes sometimes mucronate, lemmas
occasionally awned); plants introduced, rare in SK] |
![](../../../_themes/botany/blbull2.gif) | Lemmas unawned or with awns straight or somewhat flexuous; if awns
strongly outcurving, then at midspike the spikelets twice as long as the
rachis internodes or longer and extending beyond 2 nodes, and the lemmas
usually pubescent; NOT [Lemma awns strongly outcurving; at midspike the
spikelets the same length as the rachis internodes or 1.5 times as long
and extending into the middle of the next internode; lemmas glabrous] |
![](../../../_themes/botany/blbull2.gif) | Glumes widest at or near base, not widening at midlength or beyond; the
longer glume about as long as the lowest lemma; leaf blades to 4.5 mm
wide, stiff, usually glaucous, tapering to a sharp point, usually angled
away from the culm at a ± fixed angle approaching 45°; the prominently
ridged adaxial surface markedly different from the ± smooth abaxial
surface; plants with creeping rhizomes; NOT [Plants without the above combination of characteristics: if the glumes
as above then the leaf blade surfaces not markedly different] |
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