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107. Eremopyrum (Ledebour) Jaubert & Spach, Ann. Sci. Nat., Bot., sér. 3. 14: 360. 1851.
旱麦草属 han mai cao shu
Triticum [unranked] Eremopyrum Ledebour, Fl. Altaic. 1: 112. 1829.
Plants annual. Culms erect or geniculate-ascending. Leaf sheath split to base; leaf blade usually flat. Spike ellipsoid-ovoid or cylindric-ovoid, very dense; rachis short, disarticulating at nodes. Spikelets 1 per node, held at nearly 90° to rachis, sessile, laterally compressed, with 3–6 florets; rachilla somewhat scabrous or shortly pilose, with or without joints below each floret. Glumes boat-shaped, leathery, with prominent keel, margin somewhat thickened, ultimately subhorny. Lemma leathery, 5-veined, 1-keeled, apex pointed or shortly awned; callus very short. Palea usually almost 2/3 as long as lemma, scabrous or pilose along keels. Lodicules ciliate at margin. Caryopsis somewhat adherent to lemma and palea. x = 7.
About eight species: from N Africa and the Mediterranean region to the W Himalayas; four species in China.
All species are valuable fodder plants for ephemeral spring pastures.
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| 1 |
Spikelets glabrous or scabrous |
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(2) |
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Spikelets villous or hairy |
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(3) |
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| 2 (1) |
Spikelets 12–15 mm; leaf sheath not inflated on upper leaves, or slightly dilated on uppermost leaf. |
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3 E. bonaepartis |
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Spikelets 6–10 mm; leaf sheath inflated on upper leaves. |
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4 E. triticeum |
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| 3 (1) |
Spikelets 9–14 mm; glumes linear-lanceolate; lemma pubescent; palea keels prolonged into 2 short, blunt teeth; leaf sheath slightly inflated on upper leaves. |
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1 E. orientale |
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Spikelets 13–17 mm; glumes linear; lemma long villous; palea keels prolonged into 2 awned teeth 0.5–1.5 mm; leaf sheath slightly dilated but not inflated on uppermost leaf. |
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2 E. distans |
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Lower Taxa
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