Gramineae 



191 



fertile lemma with a delicate awn about 2 cm. long. Oct.- 



Nov. Woods in low mountains; Kyushu (Yakushima and 



Tanegashima). Ryukyus, Formosa, s. China, Malaysia, and 



India. 



4. Microstegium vimineum (Trin.) A. Camus var. 

 polystachjTjm (Fr. & Sav.) Ohwi. Pollinia imberbis Nees; 

 M. vimineum var. imberbe (Nees) Honda; P. japonica var. 



polystachya Fr. & Sav. Ashiboso. Slender annual; culms 



40-100 cm. long from a decumbent, branched, rooting base, 

 glabrous; leaf-blades thin, flat, lanceolate, 4-10 cm. long, 8-15 

 mm. wide, short-acuminate, obliquely cuneate at base; ligules 

 truncate, about 0.5 mm. long, puberulent on back; sheaths 



pubescent at least on outer margin above, shorter than the 

 leaf-blades and internodes of culms; inflorescence at length 

 exserted; racemes 1-3, nearly erect to ascending, straight, 

 green, 5-7 cm. long, the rachis joints rather thick, 3-angled, 

 3.5-5 mm. long, thickened above, short-pilose on the angles; 

 pedicels about 2/3 as long as the spikelets; spikelets green, 

 5-8 mm. long, die pedicelled ones somewhat flattened laterally, 

 the sessile ones with a shallow groove on die face betiveen 



the 2 ciliate keels; awn long-exserted, to 15 mm. long. 



Sept.-Oct. Woods in lowlands and in low mountains; Hok- 

 kaido, Honshu, Shikoku, Kyushu; common. Korea, China, 



Ryukyus, Formosa, Malaysia, India, and the Caucasus. 



89. EULALIA Kunth Un-nu-ke Zoku 



Erect perennials or annuals; leaf-blades elongate, linear; racemes elongate, many-jointed, long-hairy, sessile on the short axis 

 of the inflorescence; spikelets geminate, dorsiventrally slightly compressed, usually awned, the sessile spikelet disarUculating 

 with die joint and pedicel; first glume herbaceous to coriaceous, 2-keeled, hairy, the second navicular; sterile lemma hyaline, 



obtuse, usually epaleate; fertile lemma bifid, with a perfect awn from die sinus. About 20 species, in Africa, India, e. Asia, 



Malaysia, and Australia. 



lA. Culms at base covered by the yellow-brown densely villous sheath-bases; nerves between the keels of first glume very weak, not fused. 



1. E. speciosa 

 1 B. Culms at base not covered by villous sheath-bases; nerves between the keels of first glume distinct, anastomosing above. 



2. E. quadrinervis 



1. Eulalia speciosa (Deb.) O. Kuntze. Pseudopogona- 

 therum speciosum (Deb.) Ohwi; Erianthus speciosus Deb.; 

 Pollinia tanakae (Makino) Makino; Eulalia tana\ae (Makino) 



Honda Un-nu-ke. Culms tufted, erect, firm, 80-120 cm. 



long, covered at base with yellow-brown densely villous 

 sheath-bases; leaves radical and cauline, the blades linear, 

 30-50 cm. long, 5-7 mm. wide, though appearing as if 2-3 

 mm. in diameter resulting from the loosely revolute margins, 

 glabrous or nearly so, often with short hairs near base; ligules 

 truncate, short; sheaths white-pilose above; inflorescence ex- 

 serted; racemes few, erect, 12-15 cm. long, yellow-brown with 

 a purple hue, the joints villous, about 4 mm. long, oblique at 

 both ends; pedicels slightly shorter than the joints; spikelets 

 lanceolate, about 5 mm. long, rather acute, slightly flattened 



above, white-pilose; awn about 2 cm. long. Sept.-Oct. 



Honshu (Owari and Mikawa Prov.). Korea, China, and 



India. 



2. Eulalia quadrinervis (Hack.) O. Kuntze. Pollinia 

 quadrinervis Hack.; Pseudopogonatherum quadrinerve 



(Hack.) Ohwi Un-nu-ke-modoki. Culms tufted, 60- 



100 cm. long; leaf-blades rather flat, 20-40 cm. long, 3-8 mm. 

 wide, usually white-pilose; ligules short, truncate; sheaths with 

 spreading white hairs; racemes 3-7, on a short axis 8-12 cm. 

 long, the joints villous with purple-brown hairs; spikelets 

 broadly lanceolate, 5-6 mm. long, rather acute, sparsely hairy; 



awn 12-17 mm. long. Sept.-Nov. Honshu (Tokaido 



Distr. and westw.), Shikoku, Kyushu. Ryukyus, India, 



and China. 



90. POGONATHERUM Be 



Itachigaya Zoku 



Tufted perennials; leaf -blades linear; racemes solitary on the slender culms; rachis slender, articulate, the segments long-ciliate; 

 spikelets small, geminate, one of them sessile, disarticulating with the rachis joint and the pedicel, the other short-pedicellate, 

 1- or 2-flowered, with a tuft of long hairs at base; first glume membranous, obtuse, ciliate, convex on back, the second navicular, 

 awn-pointed; sterile lemma hyaline, sometimes paleate and staminate; fertile lemma hyaline, bifid, with a long awn from the 



sinus; palea nerveless; stamens 1 or 2; sterile lemma wanting in the pedicellate spikelet. Few species, in India, Malaysia, 



Polynesia, N. Queensland, and e. Asia. 



1. Pogonatherum crinitum (Thunb.) Kunth. Andro- 

 pogon crinitus Thunb.; A. monandrus Roxb.; P. sacchar- 



oideum var. monandrum (Roxb.) Hack. Itachigaya. 



Culms slender, densely tufted, 10-30 cm. long, simple or 

 slightly branched at base, glabrous, short-pilose on nodes; leaf- 

 blades thin, broadly linear to narrowly lanceolate, 4-6 cm. 

 long, 3-5 mm. wide, acuminate, glabrous, often with loosely 

 involute margins, minutely papillose-scaberulous; ligules very 



short, long-pilose; sheaths short, ciliate above; raceme solitary, 

 2-3 cm. long, the joints very short, densely white-pilose; spike- 

 lets broadly lanceolate, about 1.5 mm. long; second glume 

 with a delicate awn about 10 mm. long at apex; awn of fertile 



lemma about 15 mm. long, brown. Aug.-Nov. Rocky 



cliffs and roadbanks in lowlands; Honshu (Kii Prov. and 



Chugoku Distr.), Shikoku, Kyushu; rather common. 



Ryukyus, Formosa, China, India, and Malaysia. 



91. SORGHUM Moench Morokoshi Zoku 



Tall annuals or perennials; leaf-blades flat; panicles large, with an elongate axis and slender fascicled branches of 1 to few 

 racemes; joints of racemes rather few; spikelets geminate, one of them sessile and fertile, bisexual, 1-flowered, ovate, compressed 



