Gramineae 



165 



sunny places; Hokkaido, Honshu, Shikoku, Kyushu; very 



common. China, e. Siberia, Korea, and Formosa. 



Var. subtrivialis Ohwi. Hiroha-ichigo-tsunagi. Plant 



larger, with open panicles. Honshu (Mino Prov. and Chu- 



goku Distr.), Shikoku. 



19. Poa viridula Palib. P. nemoralis sensu auct. Japon., 



pro maxim, parte, non L. Ao-ichigo-tsunagi. Tufted 



green perennial; culms erect, 30-60 cm. long, usually smooth; 

 leaf-blades flat or loosely involute, 5-15 cm. long, 1.5-3 mm. 

 wide, green, the uppermost shorter than the sheath; ligules 

 semirounded to truncate, 1-2 mm. long; panicles narrow, 

 erect, dense, green, 8-15 cm. long, 1.5-3 cm. wide, the branches 

 3- to 5-nate, scabrous; spikelets 4-5 mm. long, 2- or 3-flowered; 

 glumes rather unequal, 3-ncrved, acuminate, about 3 mm. 

 long; lemmas green, bronzed toward the margin, 3 mm. long, 

 acute, glabrous, with delicate intermediate nerves, the keel 

 pubescent on lower half, the marginal nerves pubescent near 

 base, the web rather short, not copious; anthers about 1.5 mm. 



long. May-June. Hills and low mountains; Hokkaido, 



Honshu (Kinki Distr. and northw.). Korea, Manchuria, 



Sakhalin, and s. Kuriles. 



20. Poa nemoralis L. Tachi-ichigo-tsunagi. Closely 

 allied to the preceding; culms erect, slender, tufted, 20-50 cm. 

 long; leaf-blades green, 1-3 mm. wide; ligules truncate, about 

 0.5 mm. long; panicles erect, open, loose, the branches 3- to 

 5-nate; spikelets 3-4 mm. long, ovate; glumes lanceolate, acumi- 

 nate; lemmas oblong, acute, glabrous on the sides, with obscure 

 intermediate nerves, 2-3 mm. long, pubescent on lower half 

 of die keel and marginal nerves, the web sparse; anthers 



1.2-1.5 mm. long. Mountain woods; Honshu (Kanto and 



centr. Distr.); rare. n. Korea, Kuriles, and cooler parts of 



the N. Hemisphere. 



21. Poa matsumurae Hack. P. tomentosa Koidz.; P. 

 iwatcana Ohwi; P. chosenensis Ohwi; P. trivialis var. to- 



mentella Honda; P. iwayae Honda Ito-ichigo-tsunagi. 



Slender, green or vivid green perennial with slender, elon- 

 gate rhizomes; culms 50-80 cm. long, smooth, solitary or few; 

 leaf-blades thin, flat, 10-15 cm. long, 1.2-3 mm. wide, often 

 sparsely pilose above; sheaths slightly compressed, the lower 

 sometimes puberulent; ligules 1-2 mm. long, truncate; pani- 

 cles loose, open, green or yellowish green, 8-15 cm. long, 3-5 



cm. wide, the branches subverticillate, slender, scabrous, 

 spreading; spikelets 4-6 mm. long, prominently compressed, 

 4- or 5-flowered; glumes narrowly lanceolate, 2.5-3 mm. long, 

 very acute, 3-nerved, scabrous on the keel; lemmas broadly 

 lanceolate, about 3.5 mm. long, glabrous, with distinct inter- 

 mediate nerves, the keel and marginal nerves pubescent on 

 lower '/2-/4 of the entire length, the web copious; anthers 



1.2-1.5 mm. long. May-July. Mountain woods; Honshu 



(centr. distr. and northw.), perhaps also in Hokkaido; rare. 

 Korea. 



22. Poa pratensis L. Nagahagusa. Very variable, rhi- 

 zomatous perennial; culms erect, 30-80 cm. long, smooth, 

 rather firm; leaf-blades nearly flat to loosely involute, 7-20 

 cm. long, 2-A mm. wide, usually glabrous; ligules truncate, 1-2 

 mm. long; panicles narrowly ovate, 8-15 cm. long, contracted, 

 densely spiculose, erect, the branches subverticillate, scabrous; 

 spikelets ovate, 3-6 mm. long, 3- to 5-flowered; glumes slightly 

 unequal, acute, scabrous on the keel, the lower lanceolate, 

 1-nerved, 1.5-2 mm. long, the upper broadly lanceolate, 

 3-nerved, 2-2.5 mm. long; lemmas about 3 mm. long, acute, 

 glabrous on the sides, the intermediate nerves distinct, the keel 

 and marginal nerves pubescent on lower Vi-V^ of the entire 

 length, the web copious; anthers 0.8-1.2 mm. long. May- 

 July. Spontaneous in mountains, although believed to be 

 naturalized, very common in lowland pastures and parks; 

 Hokkaido, Honshu, Shikoku, Kyushu. Eurasia. 



23. Poa compressa L. Ko-ichigo-tsunagi. Rhizoma- 

 tous perennial; culms 20-60 cm. long, erect, strongly flattened, 

 smooth; leaf -blades nearly flat, green, 7-15 cm. long, 1.5-3 

 mm. wide; ligules truncate to semirounded, short; panicles 

 erect, rather firm, densely spiculose from near the base, deep 

 green, lanceolate, 3-7 cm. long, the branches 2- or 3-nate, sca- 

 brous, 1-2 cm. long; spikelets 3-5 mm. long, 3- to 6-flowered, 

 short-pedicelled; glumes about equal, 3-nerved, broadly lanceo- 

 late, rather acute; lemmas 2-3 mm. long, obtuse, bronzed to- 

 ward the margin, glabrous on the sides, with rather obscure 

 intermediate nerves, the keel and marginal nerves pubescent 

 only near the base, the web short, not copious; anthers 0.8-1.2 



mm. long. May-July. Naturalized; Hokkaido, Honshu; 



rather rare. Europe and Siberia. 



41. GLYCERIA R. Br. Dojo-tsunagi Zoku 



Glabrous perennials with flat leaf-blades, terete closed sheaths and narrow to broad panicles; spikelets 3- to many-flowered, 

 linear to ovate, articulate below the florets; glumes hyaline, 1- (3-) nerved, usually shorter than the florets; lemmas rounded 

 on back, without a keel, awnless, 7- to 9-nerved, scabrous, with a hyaline margin; callus minute, glabrous; rachilla slender, 

 glabrous; palea 2-keeled, as long as the lemma or slighdy longer, the keels sometimes narrowly winged; stamens 3; ovary 



glabrous; caryopsis free within the lemma and palea, plump. About 40 species, in the temperate and cooler regions of the 



N. Hemisphere. 



\\. Spikelets cylindric, 8- to 15-flowercd, 15-50 mm. long; palea with winged keels; panicle-branches usually smooth. 



2A. Lemmas 7-11 mm. long, lanceolate, acute; anthers 1-1.2 mm. long 1. G. aculiflora 



2B. Lemmas 2.5-5.5 mm. long, narrowly oblong; anthers about 0.7 mm. long 2. G. depaupcrata 



IB. Spikelets linear to broadly elhptic, slighdy compressed, 3- to 7-flowered, 4-10 mm. long; palea with wingless keels; panicle-branches 

 usually scabrous. 

 3A. Lemmas about 2.2 mm. long; keels of palea and joints of rachilla strongly curved; anthers 0.5-0.6 mm. long. 



3. G. ischyroneura 

 3B. Lemmas 2.5-4 mm. long; keels of palea and joints of rachilla nearly straight. 



4A. Ligules about 1 mm. long; plant rather firm and stout; anthers 0.5-0.6 mm. long 4. G. hpioUpis 



43. Ligules 2-3 mm. long; plant soft or slender with open, loose, nodding panicles. 



5A. Lower glume about 1 mm. long, the upper 1.3-1.5 mm. long; anthers 0.5-0.6 mm. long; Icaf-bladcs thin. 



5. G. lilhiiamca 

 53. Lower glume 2-2.5 mm. long, the upper 2.5-3 mm. long; anthers 0.7-1 mm. long; leaf-blades very thin. 



6. G. alnasterclum 



