156 Gramineae 



32. ASPEKELLA Humb. Azumagaya Zoku 



Perennials with flat, rarely involute leaf-blades; spikes slender, loosely flowered; spikelets geminate, rarely solitary, spreading 

 to ascending, 2- to 4- or sometimes l-flowered; glumes minute or wanting; lemmas broadly lanceolate, 5-nervcd, hispid- 

 scabrous, coriaceous, green, attenuate into long awns; rachilla scabrous, fragile; stamens 3; ovary with a hairy beak; caryopsis 

 adherent to the lemma and palea. Few species in temperate regions of the N. Hemisphere, exclusive of Europe. 



lA. Upper part of the culm and axis short-pubescent; spikelets usually geminate, 1- or 2-flowered; anthers about 3 mm. long 



l.A. longearistata 

 IB. Culms and spikes glabrous; spikelets solitary, l-flowered; anthers 4 mm. long l.A. japonica 



1. Asperella longearistata (Hack.) Ohwi. A. sibirica 2. Asperella japonica Hack. Hystrix japonica (Hack.) 



var. longearistata tlick.; Hystrix longearistata (Hack.) Honda Ohwi; H. hac\elii Honda Iwa-take-so. Rhizomes slen- 



Azumagaya. Rhizomes short; culms 70-100 cm. long, der; culms in loose tufts, slender, 60-80 cm. long, smooth; leaf- 

 slender, short-pubescent below the spike and on nodes; leaf- blades deep green, thin, flat, broadly linear, 10-20 cm. long, 

 blades flat, thin, broadly linear to lanceolate, 10-25 cm. long, 8-15 mm. wide; spikes slender, pendulous or prominently nod- 

 1-2 cm. wide, green; spikes exserted, pendulous, 10-15 cm. ding, about 10 cm. long, the axis glabrous; spikelets solitary, 

 long, slender, the axis densely pubescent; spikelets sessile, 10- sessile, l-flowered, slightly ascending; florets readily deciduous; 

 12 mm. long, 1- or 2-flowered, green; florets readily deciduous; glumes wholly suppressed or short-subulate, to 4 mm. long; 

 glumes subulate, 4-6 mm. long, sometimes wanting; lemmas lemmas about 10 mm. long, lanceolate, long-hispid near the 

 about 10 mm. long, sparsely hispid toward the apex, the awn margin, the awn erect, slender, 15-25 mm. long; rachilla 



straight, 15-20 mm. long; rachilla slender; palea as long as the slender; palea as long as the lemma. June-July. Woods; 



lemma, lanceolate. June-July. Mountain woods; Hok- Honshu (Shinano and westw.), Shikoku, Kyushu; rare. 



kaido, Honshu, Shikoku, Kyushu; rather rare. Korea. 



33. HORDEUM L. O-mugi Zoku 



Tufted annuals or perennials; leaf-blades flat; spikelets l-flowered, 3 together, alternate on opposite sides at each node; middle 

 spikelet sessile, the glumes subulate, distorted at base, standing at the sides of the 1 ferule floret; rachilla disarticulating above 

 the glumes and, in the central spikelet, prolonged behind the palea as a bristle; palea as long as the body of the lemma, adhering 

 to the caryopsis; stamens 3; lateral spikelets pedicelled, reduced, the florets sterile; caryopsis adherent to the lemma and palea. 

 ^More than 20 species, chiefly in temperate regions. 



lA. Glumes of the fertile florets not ciliate, about 12 mm. long; lemma about 5 mm. long \. H. hystrix 



IB. Glumes of the fertile florets ciliate below, about 2.5 cm. long; lemma 8-10 mm. long 2. H. murinum 



1. Hordeum hystrix Roth. H. gussoneanum Pari. 2. Hordeum murinum L. Mugi-kusa. Annual; culms 



HiME-MUGi-KUSA. Annual; culms 20-40 cm. long; blades 10-50 cm. long, glabrous; leaf-blades flat, smooth, glabrous; 

 linear, usually pilose below; sheaths often pilose; spike 2-4 spike 4-7 cm. long, pale green; glumes of fertile florets linear- 

 cm. long, erect, pale green; glumes of fertile spikelets scabrous, lanceolate, 3-nerved, 2.5-3 cm. long, 0.3-1 mm. wide, ciliate 



narrowly subulate; lemma broadly lanceolate, 5-6 mm. long, below the middle. May-July. Naturalized in waste places 



the awn nearly erect, scabrous, about 10 mm. long. and cultivated fields; Honshu, Shikoku, Kyushu. ^Europe. 



Namralized in waste places; Honshu. Europe and Asia 



Minor. 



34. BROMUS L. Suzume-no-cha-hiki Zoku 



Perennials with short rhizomes or annuals, with linear leaf -blades and closed, cylindric sheaths; panicles loose to compact; 

 spikelets 3- to many-flowered, usually rather large, slightly flattened laterally, articulate above the glumes and between the 

 florets; glumes 1- to 9-nerved, membranous, sharply to obtusely keeled; lemmas green to pale green, 5- to 7-nerved, rounded 

 or sometimes keeled, 2-toothed, membranous or chartaceous, awned between the minute teeth or awnless; palea 2-keeled; 



stamens 3; ovary hairy at apex, the styles usually lateral; caryopsis adherent to the palea. Many species, chiefly in temperate 



and cooler regions, also in high mountains of the Tropics. 



lA. Lower glume 1-nerved, the second 3-nerved; lemmas usually narrow. 

 2A. Perennials. 



3 A. Lemmas broadly lanceolate, nearly awnless or the awn less than half as long as the lemma; spikelets pale green or whitish 

 green, sometimes brownish purple. 

 4A. Lemmas long-ciliate, the awn 2-4 mm. long; anthers 1-1.2 mm. long; panicles nodding, loose, the branches rather long. 



1. B. yezoensts 

 4B. Lemmas glabrous, the awn to 1 mm. long; anthers 4-5 mm. long; panicles erect, rather dense, the branches rather short. 



2. B. inermis 



3B. Lemmas narrowly lanceolate, the awn half as long to as long as the lemma; spikelets deep green 3. B. pauciflorus 



2B. Annuals; naturalized species. 



5A. Upper glume not more than 10 mm. long; lemmas 10-12 mm. long, with a straight awn 12-14 mm. long 4. B. tectorum 



5B. Upper glume more than 10 mm. long; lemmas 17-23 mm. long, with an awn 2-5 cm. long. 



