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Volume V (2000) - Flora of New Zealand Gramineae
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Agrostidinae

AGROSTIDINAE

Spikelets with 1 ⚥ floret; glumes commonly enclosing floret.

Key

1
Glumes villous throughout, or ciliate on keel
2
Glumes glabrous, or finely scabrid, especially on keel, sometimes finely ciliate on margins
5
2
Lemma awnless or shortly mucronate
Phleum
Lemma awned
3
3
Leaves pubescent throughout; lemma with 2 awn-tipped lateral teeth
Lagurus
Leaves mainly glabrous but adaxially with hairs near base and sometimes scattered hairs; lemma truncate to acute, or with entire lateral lobes
4
4
Panicle soft, narrow-cylindric; awns slender; glumes united near base or for c. ¼ length
Alopecurus
Panicle tough, ovate-globose to oblong; awns stout, bristly; glumes free to base
Echinopogon
5
Glumes swollen near base
Gastridium
Glumes never swollen
6
6
Glumes slightly < ½ length of lemma
Simplicia
Glumes, both or one, > lemma or ≈ lemma
7
7
Lemma with glabrous callus
8
Lemma with hairy callus, hairs sometimes minute
10
8
Lemma coriaceous, much harder than glumes
Miliumξ (p. 292)
Lemma ± membranous, of similar texture to glumes or softer
9
9
Spikelets disarticulating below glumes and falling entire with piece of pedicel attached
Polypogon
Spikelets disarticulating above the persistent glumes
Agrostis
10
Lemma ± translucent, soft, membranous or very thin at maturity, smooth and ± shining, sometimes ± covered by hairs
11
Lemma ± opaque, ± hard and rigid at maturity, ± scaberulous or scabrid at least above, never completely smooth and shining, hairs 0
13
11
Callus hairs = lemma
Calamagrostisξ (p. 292)
Callus hairs < lemma
12
12
Culm with panicle rachis persistent; lemma usually glabrous, very rarely with a few hairs near margins in lower ½
Agrostis
Culm fragile below panicle, breaking off with panicle attached and readily wind-blown; lemma usually softly, ± sparsely hairy
Lachnagrostis
13
Lemma sharply keeled
Ammophila
Lemma rounded or lightly keeled
14
14
Lemma with long central awn and four shorter lateral awns
Pentapogon
Lemma with a single awn
15
15
Awn ≥ 10 mm; lemma entire or minutely bifid at apex
Dichelachne
Awn < 10 mm; lemma minutely 4-toothed at apex
Deyeuxia
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