166 



Gramineae 



1, Glyceria acutiflora Torr. Hemibromus japonkus 



Steud.; G. japonica (Steud.) Miq. Mutsu-oregdsa, Mino- 



GOME. Soft perennial; culms 20-70 cm. long, erect from a 

 long, creeping base with sterile ascending innovations; leaf- 

 blades thin, flat, 10-30 cm. long, 3-6 mm. wide, nearly smooth, 

 glaucescent above, short-acuminate; ligules 4-7 mm. long, nar- 

 rowly deltoid; panicles linear, 10-30 cm. long, partly enclosed 

 within the uppermost leaf-sheath, with 5 to 20 spikelets, the 

 branches geminate, strongly unequal, appressed to the axis, 

 smooth; spikelets 25-50 mm. long, pale green, 9- to 15-flowered, 

 short-pedicelled; glumes unequal, 1-nerved, lanceolate, rather 

 acute, the lower about 2 mm., the upper 4-5 mm. long; lemmas 

 lanceolate, minutely scabrous, 7-9 mm. long, 7-nerved, with 

 short, parallel veinlets between the nerves; palea 0.7-1 mm. 

 longer than the lemma, bicuspidate; caryopsis 3-4 mm. long. 

 -May-June. Ponds, paddy fields; Honshu, Shikoku, Kyu- 

 shu; common. Korea, Ryukyus, China, and N. America. 



2, Glyceria depauperata Ohwi. Glyceria fluitans var. 



leptorrhiza sensu auct. Japon., non Maxim. Hime-ukigaya. 



Similar to but much smaller than the preceding; leaf-blades 

 2-4 mm. wide; ligules 2-5 mm. long; panicles only slightly 

 exserted, 10-25 cm. long; spikelets rather many, very short- 

 pedicelled, 10-25 mm. long, 7- to 15-flowered; glumes nar- 

 rowly ovate, the lower 1 mm., the upper about 2 mm. long; 

 lemmas 2.5-3.5 mm. long. ^Ponds and riverbanks; Hok- 

 kaido, Honshu. 



Var. infirma (Ohwi) Ohwi. G. -fluitans sensu auct. Japon., 



non R. Br.; G. leptorrhiza var. inflrma Ohwi Ukigaya. 



Plant with larger lemmas, 4-5.5 mm. long. Occurs with the 



typical phase. 



3, Glyceria ischyroneura Steud. G. tonglensis sensu 

 auct. Japon., non C. B. Clarke; G. caspica sensu auct. Japon., 



non Trin.; G. tonglensis var. honshuana Kelso Dojo- 



TsuNAGi. Slender to rather stout perennial; culms erect 

 from an ascending base, 80-120 cm. long; leaf-blades flat, 

 somewhat membranous, 30-60 cm. long, 3-7 (-10) mm. wide; 

 sheaths terete; ligules short, truncate; panicles lanceolate to 

 ovate, 15-40 cm. long; spikelets narrowly oblong, 5-7 mm. 

 long, 3- to 6-flowered, pale green, sometimes tinged pale 

 purple; glumes oblong, obtuse, weakly 1-nerved, the 1st about 

 1 mm. long, the 2d 1.5-2 mm. long; lemmas ovate, obtuse, 

 about 2.2 mm. long, 7-nerved; palea with conspicuously curved 

 keels, slightly inflated below. May-June. Ponds and river- 



banks; Hokkaido, Honshu, Shikoku, Kyushu; common. 



Korea. 



4. Glyceria leptolepis Ohwi. G. aquatica sensu auct. 



Japon., non Wahl. ; G. ussuriensis Komar. Hiroha-no-do j6- 



TsuNAGi. Stout, pale green perennial; culms 80-150 cm. 

 long; leaf-blades rather thick, firm, scabrous, 40-60 cm. long, 

 5-12 mm. wide, short-acuminate, with loosely involute mar- 

 gins; sheaths terete; ligules truncate, about 1 mm. long; pani- 

 cles large, 20-30 cm. long, ovate, nodding, the branches sub- 

 verticillate, scabrous; spikelets numerous, 6-8 mm. long, 4- to 

 6-flowered, pale green, rarely slightly brownish; glumes ob- 

 tuse, narrowly oblong, 1-nerved, 1.5-2 mm. long; lemmas nar- 

 rowly oblong, 3-4 mm. long, punctate-scaberulous, 7-nerved, 

 obtuse, rather thin; palea as long as the lemma; caryopsis 



narrowly obovoid, about 1.5 mm. long. July-Aug. Ponds 



and riverbanks; Hokkaido, Honshu, Kyushu; rather rare. 



Korea, Ussuri, Manchuria, China, and Formosa. 



5. Glyceria lithuanica (Gorski) Lindm. Poa lithuanica 



Gorski; G. remota (Forselles) Fries Karafuto-dojo-tsu- 



NAGi. Stoloniferous perennial; culms 80-100 cm. long; leaf- 

 blades thin, 20-30 cm. long, 5-8 mm. wide, rather flat, vivid- 

 green, scabrous above; panicles nodding to pendulous, loose, 

 15-25 cm. long, the branches slender, 2- to 5-nate, slightly 

 scabrous; spikelets numerous, ovate or oblong, 4-7 mm. long, 

 usually purpurascent, 3- to 5-flowered; glumes narrowly ob- 

 long, obtuse, hyaline, often somewhat brown- and purple- 

 tinged, 1-nerved, the lower about 1 mm., the upper 1.3-1.5 

 mm. long; lemmas narrowly oblong, 3-3.5 mm. long, thin, 



7-nerved, with hyaline margins. July-Aug. Wet places in 



woods; Hokkaido, Honshu (centr. and n. distr.); rather com- 

 mon. Korea, Kuriles, Sakhalin, Manchuria, Kamchatka, e. 



Siberia, and w. Europe. 



6. Glyceria alnasteretum Komar. G. remota var. ja- 

 ponica Hack.; G. arundinacea sensu auct. Japon., non Kunth 



^MiYAMA-Dojo-TSUNAGi. Closely allied to the preceding; 



leaf-blades thinner, vivid- to deep-green, flat, 4-7 mm. wide, 

 nearly smooth; panicle branches geminate, smooth or slightly 

 scabrous; glumes lanceolate, rather acute, the lower 2-2.5 mm., 

 the upper 2.5-3 mm. long; lemmas narrowly oblong, 3.5-4 



mm. long; anthers narrowly oblong. July-Aug. Wet places 



in cool, coniferous woods; Hokkaido, Honshu (centr. distr. 



and northw.) ; rather common. Sakhalin, Kuriles, and 



Kamchatka. 



41a. TORREYOCHLOA Church Hai-dojo-tsunagi Zoku 



Resembles Glyceria in general aspect; culms often decumbent at base; leaf-sheaths open, not fused on margin; panicles open, 

 branches ascending to spreading, flexuous; spikelets oblong to ovate, few-flowered; lemmas 7- to 9-nerved; lodicules truncate, 

 united. ^Few species in the temperate and northern regions of e. Asia and N. America. 



lA. Lemmas 2-2.5 mm. long; anthers less than 0.5 mm. long; spikelets 4—6 mm. long; panicles less than 10 cm. long 1. T. natans 



IB. Lemmas about 3.5 mm. long; anthers about 0.5 mm. long; spikelets 6-9 mm. long; panicles larger 2. T. viridis 



1. Torreyochloa natans (Komar.) Church. Glyceria 



natans Komar.; G. pallida sensu auct. Japon., non Trin. 



HosoBA-Dojo-TsuNAGi. Slender glabrous perennial; culms 



ascending, long-creeping at base, 20-40 cm. long; leaf-blades 

 5-10 cm. long, 1.5-3 mm. wide, flat, thin, glaucescent; ligules 

 narrowly deltoid, 3-6 mm. long; panicles narrowly ovate, 

 rather loose and open, 6-10 cm. long, the branches 2- to 4-nate, 

 scabrous, slender, ascending; spikelets narrowly oblong, 4-6 

 mm. long, 3- or 4-flowered, pale green; glumes broadly lan- 

 ceolate, rather obtuse, the 1st 1-1.2 mm. long, the 2d with a 



pair of short lateral nerves, about 1.5 mm. long; lemmas nar- 

 rowly ovate, 2-2.5 mm. long, 7-nerved, scaberulous. July- 

 Aug. Ponds; Hokkaido, Honshu (Kamikochi in Shinano) ; 



rare. s. Kuriles, Sakhalin, Ussuri, and Kamchatka. 



2. Torreyochloa viridis (Honda) Church. Glyceria 

 viridis Honda Hai-dojo-tsunagi. Allied to the preced- 

 ing but larger; culms 30-50 cm. long; leaf-blades 10-15 cm. 

 long, 4-6 mm. wide; panicles exserted, 10-20 cm. long, 3-5 cm. 

 wide, the branches subverticillate, ascending, slender, scabrous; 

 spikelets 6-9 mm. long, green, 7- to 9-flowered, the pedicels 



