144 



Gramineae 



(Nees) Nevski Hiegaeki. Tufted annual; culms 20-50 



cm. long, smooth; leaf -blades pale green, flat, scabrous, 5-15 

 cm. long, 3-7 mm. wide; ligules 3-8 mm. long, weakly nerved 

 beneath; panicles nearly cylindric, more or less interrupted, 

 3-8 cm. long, 1-2 cm. wide; pedicels about 0.3 mm. long; 

 spikelets about 2 mm. long, sometimes slightly purplish; 

 glumes rounded on back, shallowly bifid, the awn erect from 

 the sinus, about as long as the glume; lemma and palea equal, 

 about 0.8 mm. long; anthers about 0.5 mm. long; caryopsis 0.6 



mm. long, ellipsoidal, scarcely compressed. Honshu, Shi- 



koku, Kyushu; rather common. Korea, China, Ryukyus, 



Formosa, India, s. Siberia, Asia Minor, and Africa. 



3. Polypogon hondoensis Ohwi. Agropogon hondo- 



ense (Ohwi) Hiyama Nukabogaeri. Culms 20-40 cm. 



long; leaves glaucescent, 5-10 cm. long, 3-5 mm. wide, more 

 or less scabrous; ligules 3-4 mm. long, glabrous; panicles nar- 

 rowly ovoid, dense, 5-8 cm. long, 2-2.5 cm. wide, branches 

 short, ascending, the pedicels clavate; spikelets about 2 mm. 

 long, somewhat purple-tinged; glumes broadly lanceolate, 

 scabrous, acute, entire; awn erect, 5^-/4 as long as the glume; 

 lemma ovate, obscurely 5-nerved, 1.5 mm. long, truncate, 



4-toothed; anthers 0.6 mm. long. Honshu (Kanto Distr. 



and northw.); rare. Possibly a hybrid of Agrostis stoloni- 



fera var. palustris X Polypogon jugax. 



12, CINNA L. FusagayaZoku 



Perennials with rather tall culms; leaf-blades linear, flat, membranous; inflorescence a panicle; spikelets flattened, 1-flowered, 

 articulate above the pedicel, falling entire; glumes nearly equal, strongly folded, 1- to 3-nerved, acute; lemma simulating the 

 glumes in length and texture, folded, obscurely 3-nerved, somewhat obtuse, awnless or with a short erect awn just below the 



apex; rachilla minute; palea apparently 1-keeled; stamen I; caryopsis free within the lemma and palea. Two species in the 



cooler regions of the N. Hemisphere. 



1. Cinna latifolia (Trevir.) Griseb. Agrostis latifoUa 



Trevir.; C. pendula Trin.; Muhlenbergia baicalensis Trin. 



FusAGAYA. Slender perennial without stolons; culms 80-120 

 cm. long, smooth; leaf-blades flat, linear, scabrous, 20-25 cm. 

 long, 8-12 mm. wide; ligules ovate, obtuse, hyaline, 1.3-3 mm. 

 long; panicles exserted, nodding, narrowly ovate, 20-30 cm. 

 long, the branches semiverticillate, slender; spikelets flattened, 

 3-3.5 mm. long, on slightly thickened pedicels; glumes nearly 



equal, lanceolate, 1-nerved, scabrous, green, acute; lemma as 

 long as the glumes, broadly lanceolate, 2-2.5 mm. long, short- 

 awned from just below the apex, the awn not exserted; 

 stamens 1, rarely 2, the anthers oblong, about 0.5 mm. long; 



ovary glabrous. July-Aug. Mountain woods; Hokkaido, 



Honshu (centr. distr. and northw.). ne. Europe, Siberia, 



Manchuria, Kamchatka, Korea, and N. America. 



13. BECKMANNIA Host Minogome Zoku 



Annuals or perennials; leaf-blades linear; ligules hyaline; panicles narrow, often interrupted, erect, with numerous short 

 appressed or ascending racemes; spikelets sessile in 2 rows on one side of the rachis, disarticulating below the spikelets, laterally 

 flattened, l-(-2) flowered; glumes equal, chartaceous, navicular, rather inflated and bowed out on the back, transversely 

 wrinkled, mucronate, slightiy connate at base, 3-nerved; lemma narrowly ovate, whitish, 5-nerved, acuminate or mucronate, 

 slightly keeled on back; callus glabrous; palea about as long as the lemma, 2-keeled; stamens 3; caryopsis fusiform, obtusely 

 angled. Two species, in the cooler and temperate regions of the N. Hemisphere. 



1. Beckmannia syzigachne (Steud.) Fern. Panicum 

 syzigachne Steud.; B. erucaeformis sensu auct. Japon., non 

 Host; B. erucaeformis var. uniflora Scribn.; B. erucaeformis 



var. baicalensis V. Kusn.; B. baicalensis (V. Kusn.) Hult. 



Minogome, Kazdnoko-gusa. Rather stout, soft, glabrous 



annual; culms tufted, smooth, 30-90 cm. long; leaf-blades pale 

 green, flat, scabrous, 7-20 cm. long, 5-10 mm. wide, glabrous; 

 ligules hyaline, ovate or deltoid, 3-6 mm. long; panicles erect. 



15-35 cm. long, laterally compressed and interrupted, green, 

 the branches less than 5 cm. long, triangular; spikelets sessile, 

 3-3.5 mm. long, and as wide, dull, pale green, 1(2-) -flowered; 

 lemma as long as the glumes; anthers ellipsoidal, 0.5-0.7 mm. 



long, pale yellow. June-July. Paddy fields and along 



rivers; Hokkaido, Honshu, Shikoku, Kyushu; very common. 

 Korea, China, Sakhalin, Kuriles, e. Siberia, and N. Amer- 



14. CALAMAGROSTIS Adans. Nogari-yasu Zoku 



Perennial, commonly tall and robust, often with stolons or rhizomes; culms slender to rather stout; leaf-blades linear; 

 panicles erect, open to contracted; spikelets 1-flowered, articulate below the floret; glumes 2, nearly equal, keeled, acuminate to 

 acute, 1- to 3-nerved; lemma ovate, membranous, punctulate, 3- to 5-nerved, entire to denticulate, rarely aristulate, the midrib 

 usually excurrent on the back into a slender, geniculate awn; callus short, with a tuft of hairs; rachilla prolonged beyond the 



floret, rarely wanting; stamens 3; ovary glabrous; caryopsis oblong to fusiform, free from the lemma and palea. Cooler 



regions and higher mountains in the Tropics. 



lA. Glumes linear-lanceolate to linear; lemma 3-nerved 1/3-1/2 as long as the glumes, hyaline; callus-hairs much longer than the lemma; 

 rachilla not prolonged. 



2A. Panicles erect; glumes equal; awn from the back of lemma; leaf-blades sparsely scabrous 1. C. epigeios 



2B. Panicles nodding; glumes unequal; awn from near the tip of lemma; leaf-blades densely scabrous 2. C. pseudophragmites 



IB. Glumes lanceolate to narrowly ovate; lemma 3- to 5-nerved, as long as or slightly shorter than the glumes; callus-hairs much shorter 

 than to nearly as long as the lemma; rachilla usually prolonged. 

 3A. Awn included or wanting, erect or nearly so; callus-hairs usually slightly shorter than the lemma. 



