Hordeum murinum
Hordeum murinum
Ssp glaucum: Duvar arpası; Ssp leporinum: Kılçık arpa; Ssp murinum: Pisipisiotu
Annual. Stems 10-45 cm, loosely tufted or solitary. Leaves flat, 2-7 mm broad, glabrous or sparsely pubescent. Spike 4-10 x 1-2.5 cm, oblong, compressed, with fragile rachis. Central spikelet: glumes 1.5-3 em , narrowly lanceolate, ± ciliate on margins, gradually tapering into a long awn; lemma 7-12 mm, glabrous, with awn 1.8-4.5 cm. Lateral spikelets male or empty; glumes 1.5-3 cm, slightly dissimilar, inner narrowly lanceolate, ciliate on margins in lower part, rarely glabrous; outer linear-subulate ; lemma long-awned.
1. Central floret sessile or nearly sessile, with lemma exceeding lemma of lateral spikelets; palea of central floret 1-1.5 x that of lateral florets; leaves green subsp. murinum
1. Central floret pedicellate, with lemma not exceeding lemma of lateral spikelets; palea of central floret 0.7-0.8 x that of lateral florets; leaves green or glaucous
2. Anthers of central floret 0.2-0.5 mm; prolongation of rachilla of lateral florets stout, yellowish-brown; leaves glaucous subsp. glaucum
2. Anthers of central floret 0.7-1.4 mm; prolongation of rachilla of lateral florets slender, green; leaves green subsp.leporinum
3. Hairs of spike rachis 0.2-0.4 mm var.leporinum
3. Hairs of spike rachis 0.5-0.75 mm var. simulans
