Gramineae 



151 



1. Achnatherum pekinense (Hance) Ohwi. Stipa 

 pel{inensis Hance; S. effusa (Maxim.) Nakai, non Mez; S. 



sibirica var. effusa Maxim.; S.extremiorientalis Hara Hane- 



CAYA. Rather rigid erect perennial; culms 80-150 cm. long; 

 leaf-blades slightly involute, 30-60 cm. long, 7-15 mm. wide, 

 scabrous on the margin, glabrous; sheaths pilose on the collar; 

 ligule 0.5-1 mm. long, truncate; panicles erect, ovate, open at 

 anthesis, 20-40 cm. long, the branches subverticillate, scabrous; 



spikelets lanceolate, 8-12 mm. long, sometimes purplish, lus- 

 trous; glumes membranous, green, with broad hyaline mar- 

 gins, 3-nerved, smooth, not keeled; lemma 6-8 mm. long, 

 sparingly pubescent, the awn 20-25 mm. long, erect, slightly 

 flexuous at tip; anthers linear, 4-6 mm. long, short-pilose at 



apex. Aug.-Sept. Edges of woods and grassy slopes in 



mountains; Hokkaido, Honshu; rather rare. e. Siberia, n. 



China, Korea, Sakhalin, and s. Kuriles. 



23, ORTHORAPfflUM Nees Hiroha-no-hanegaya Zoku 



Rather rigid, tall perennial with flat or nearly flat leaf-blades and narrow erect panicles; spikelets bisexual, lanceolate, terete, 

 articulate above die glumes; glumes lanceolate, green, scarcely hyaline-margined, 5- to 7-nerved, the nerves connected by 

 few transverse veinlets; lemma coriaceous, brownish, involute, terete, lanceolate, usually pubescent, the awn exserted between 

 2 minute teeth at apex, erect, rather stout, slighdy flexuous at tip, obscurely jointed at base; callus obtuse, short-pilose; palea as 

 long as the lemma, 2-nerved; stamens 3; lodicules 3. Two species, in India, China, Korea, and Japan. 



1. Ortlioraphium coreanum (Honda) Ohwi var. kengii 

 (Ohwi) Ohwi. Achnatherum coreanum var. \engii Ohwi; 

 Stipa coreana var. kengii Ohwi as a synonym of A. coreanum 



var. \engii Ohwi Hiroha-no-hanegaya. Perennial; 



culms 60-100 cm. long, erect, with 5- to 7-nodes; leaf-blades 

 grayish green, rather flat, 20-40 cm. long, 7-15 mm. wide; 

 sheaths short-pilose on the collar; ligules truncate, about 1 mm. 

 long; panicles erect, linear, exserted, 15-30 cm. long, dense. 



rather few-flowered, the branches geminate; spikelets 12-15 

 mm. long; glumes green, equal, broadly lanceolate, acute, 

 smooth, glabrous, rounded on back; lemma about 12 mm. 

 long, the awn stout, 25-30 mm. long, scabrous, 2-grooved on 

 inner side; anthers linear, 7-8 mm. long, glabrous. ^Moun- 

 tain woods; Hokkaido, Honshu, Shikoku, Kyushu. The 



typical phase occurs in Korea and China. 



24. MILIUM L. Ibuki-nukabo Zoku 



Rather soft perennials with flat, linear leaf-blades and open panicles; spikelets 1-flowered, ovate, not compressed, articulate 

 above the glumes; glumes equal, obscurely 3-nerved, green, not keeled; lemma ovate, as long as the glumes, coriaceous, lustrous, 

 obscurely 5-nerved, smooth, awnless, the callus minute, glabrous; palea simulating the lemma in texture and length; anthers 

 and ovary glabrous. A few species in the cooler regions of the N. Hemisphere. 



1. Milium effusum L. Ibuki-nukabo. Glabrous, 



green, soft perennial; culms erect, sometimes slightly decum- 

 bent at base, 60-120 cm. long; leaf-blades flat, linear, 10-20 

 cm. long, 10-15 mm. wide, abrupdy acute; ligules hyaline, 

 5-10 mm. long, obtuse, smooth; panicles open, loose, 15-25 

 cm. long, ovate, the branches 2- to 5-nate, scabrous; spikelets 

 about 3 mm. long, ovate; glumes ovate, rather obtuse, smooth, 



25. PHALARIS L. 



green; lemma coriaceous and glossy, smooth, scarcely shorter 

 than the glumes, rounded on back, slightly dorsiventrally 



compressed; anthers about 2 mm. long. June-July. Wet 



grassy places in mountain woods; Hokkaido, Honshu, Shi- 

 koku, Kyushu; rather common. Formosa, Korea, s. Kuriles, 



Sakhalin, and cooler regions of Eurasia and N. America. 



KusA-YosHi Zoku 



Annuals or perennials with linear, usually flat leaves and contracted panicles; spikelets laterally compressed, articulate above 

 the glumes; glumes membranous, navicular, 3-nerved, acute or cuspidate, the keel often winged; fertile floret with 2 (rarely 

 1), minute, appressed scales corresponding to sterile lemmas, attached at base; lemma of fertile floret ovate, not longer than 

 the glumes, usually pubescent, obscurely 5-nerved, coriaceous to chartaceous, acute, lustrous, laterally compressed; callus very 



short, glabrous; rachilla not prolonged; palea lanceolate, faintly 2-nerved; stamens 3; anthers and ovary glabrous. About 



20 species, in the temperate zones of Eurasia and N. America. 



1. Phalaris arundinacea L. Digraphis arundinacea 

 (L.) Trin.; P. japonica Steud.; Baldingera arundinacea (L.) 

 Dumort; P. arundinacea var. genuina Hack, and var. japonica 



(Steud.) Hack. Kusa-yoshi. Gregarious perennial; culms 



rather stout, 70-180 cm. long, with 6-10 nodes; leaf-blades flat, 

 glaucous-green, scabrous, 20-30 cm. long, 8-15 mm. wide, 

 glabrous; ligules truncate, 2-3 mm. long; panicles 10-15 cm. 

 long, 1-3 cm. wide, erect, very dense, sometimes spikelike, 

 pale green or sometimes slightiy purplish, the branches erect 

 or ascending, single or in pairs, the branchlets short, densely 



spiculose; spikelets 4-5 mm. long, ovate, flattened, appressed 

 to the branchlets, very acute; glumes equal, short-acuminate, 

 folded, scabrous, the keel with a very narrow wing above; 

 florets lanceolate-ovate, 3-3.5 mm. long, the attached sterile 

 lemmas minute, villous; anthers 1.5-2 mm. long. May- 

 June. Wet sunny places; Hokkaido, Honshu, Shikoku, Kyu- 

 shu; common. Cooler regions of the N. Hemisphere. 



Var. picta L. Ribongurasu. Leaves variegated. Some- 

 times cultivated as an ornamental. 



26. ANTHOXANTHUM L. Harugaya Zoku 



Slender annuals or perennials, fragrant; leaf-blades linear, flat or loosely involute; panicles usually contracted, sometimes 

 spikelike; spikelets with 1 terminal perfect floret and 2 sterile lemmas falling together, both or at least one of them neuter and 



