Deschampsia flexuosa
(L.) Trin.

Anther length 2–3 mm Anther number 3 Awn on glume the glume has no awn Bristles below spikelets no Floret lower bract texture the lemma is thin and flexible Floret number 2 Floret types within spikelet all the florets within a spikelet are similar Glume awn length 0 mm Glume relative length

  • neither glume is quite as long as all of the florets
  • one or both glumes are as long or longer than all of the florets

Glume shape the glume is V-shaped in cross-section Glume veins 1 Glumes per spikelet 2 Inflorescence arrangement the spikelets are uniform Inflorescence axis orientation the inflorescence axis bends downwards or hangs Inflorescence branch roughness the inflorescence branches are smooth or only slightly rough Inflorescence branches the flowers are attached to branches rather than to the main axis of the inflorescence Inflorescence branches coming off the lowest stem node 2–5 Inflorescence crowding the panicle is somewhat to very spread out, with clearly-evident branches Inflorescence length 50–150 mm Inflorescence length to width ratio 1.3–2.5 Inflorescence type (general) the spikelets are borne on stalks or on branches Inflorescence type (specific) the inflorescence is branched, and the branches do NOT both grow from the same side of the plant AND look like spikes Inflorescence width 20–120 mm Inforescence position the spikelets are mainly carried at the end of the stem Lemma awn base the awn is attached at the lower half of the lemma (it emerges from near the base of the lemma) Lemma awn coiled the lemma awn is straight or twisted, but not coiled one half turn Lemma awn length 3.7–7 mm Lemma awn number the lemma has one awn on it Lemma awn orientation the awn of the lemma on dried or older plants is curved or bent outwards Lemma base hair length Up to 1 mm Lemma base hairs the lemma has hairs at the base Lemma cross-section the lemma is flat or rounded if you cut across the midpoint Lemma hairs

  • the lemma has fine hairs between the veins
  • the lemma is hairless between the veins

Lemma keel hairs the keel of the lemma is rough, or has fine hairs Lemma marginal vein hairs the marginal vein of the lemma is hairless Lemma surface the surface of the lemma is relatively smooth (not counting any longitudinal veins or hairs) Lemma tip

  • the lemma tip has a ragged edge
  • the lemma tip is split into two or more points

Lemma tip shape the lemma tip tapers to a narrow point (it may or may not also have an awn or teeth at the tip) Lemma vein number 5 Lemma vein orientation the veins on the lemma stay roughly parallel throughout Lower glume length 2.7–4.5 mm Lower glume relative length the lower glume is nearly as long, or as long as, the upper glume One or more florets there is more than one floret per spikelet Palea length 3.8–5 mm Palea relative length palea is one half to fully as long as lemma Reproductive system all the flowers on the plant have both carpels and stamens (synoecious) Spikelet axis tip there is an extension of the spikelet axis beyond the tip of the spikelet Spikelet disintegration the spikelet breaks off above the glumes, so that after the florets fall off, the glumes remain Spikelet length 4–7 mm Spikelet number per node 0 Spikelet pedicel the spikelets have pedicels Spikelet pedicel length 3–10 mm Spikelet position the spikelets emerge mainly from the upper halves of the inflorescence branches Spikelet shape

  • the spikelets are another shape in profile
  • the spikelets are ovate (egg-shaped, widest below the middle with rounded ends) in profile

Spikelets spiny the spikelets do not appear spiny Tip of glume the tip of the glume is not divided (though it may have an awn on it) Upper glume length 3.5–5 mm Upper glume relative length the upper glume is more than one half as long as the lowest lemma Upper glume shape the upper glume is widest at or below the middle

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