238 



Cyperaceae 



staminate, linear, brown, lustrous, 2-3 cm. long, the lateral 

 pistillate, oblong-cylindric, 1.5-2 cm. long, the lowest one 

 often separate from the others, the bracts with a short leaflike 

 or setaceous blade, sheathing at base, the peduncles scarcely 

 exserted from the sheath; pistillate scales obovate, brown or 

 brownish, rounded at the apex; perigynia ovate-oblong, 3 mm. 

 long, nerved, pubescent, abruptly short-beaked, the tip mi- 

 nutely 2-toothed; stigmas 3. Apr .-May. Common in open 



woods; Honshu (centr. distr. westw. to Iwami Prov.). 



Var. cuneata (Ohwi) Ohwi & T. Koyama. C. cuneata 



Ohwi MicHi-NO-KU-HoMMONji-suGE. Plant more loosely 



tufted, with short ascending rhizomes; culms 15-40 cm. long; 

 leaf-blades flat, 2.5-4 mm. wide, the basal sheaths dark brown; 

 spikes 4 or 5, all or the lower ones distant, the terminal stami- 

 nate, 1.5-2 cm. long, the others pistillate, 1-2 cm. long, the 

 bracts short; pistillate scales often mucronate; perigynia as in 



the typical phase. Apr .-June. Thickets and thin woods; 



Honshu (Tohoku, n. Kanto and Echigo Distr.) . 



Var. ikegamii T. Koyama. Koshi-no-Hommonji-suge. 

 Intermediate between var. cuneata and the typical phase; rhi- 

 zomes densely mfted in large clumps; leaves broader, softer; 



spikes usually 3, the lower ones distant. Japan Sea side of 



centr. Honshu. 



95. Carex polyschoena Lev. & Van't. C. albomas C. B. 

 Clarke; C. pisiformis forma polyschoena (Lev. & Van't.) Kue- 



kenth. Shiro-Hommonji-suge. Rhizomes densely tufted; 



culms 30-50 cm. long; leaf-blades 1.5-3 mm. wide, the basal 

 sheaths dark brown, somewhat fibrous; spikes 2-4, erect, 1.5- 

 2.5 cm. long, the terminal staminate, linear, pale, the others 

 pistillate, distant, somewhat loosely flowered, the lowest bract 

 leaflike, longer than the spike, sheathing at base; pistillate 

 scales pale green, obovate, rounded and short-awned; peri- 

 gynia broadly obovoid, 3-3.5 mm. long, suberect, nerved, pubes- 

 cent, abruptly short-beaked, obtusely 2-toothed at tip; stigmas 

 3. Apr .-May. Kyushu (Tsushima). ^Korea and Man- 

 churia. 



96. Carex cUvorum Ohwi. Yama-o-ito-suge. Plant 

 densely tufted; culms 20-40 cm. long, slender; leaf-blades flat, 

 green, 2-3 mm. wide, the basal sheaths light brown, somewhat 

 lustrous, fibrous, the fibers sparsely covering the neck of the 

 rhizome; spikes usually 3, distant, the terminal staminate, 

 linear, long-peduncled, 2.5-3 cm. long, pale greenish yellow, 

 the others pistillate, mostly loosely flowered, 2-3 cm. long, 

 broadly linear, the bracts short, rather long-sheathing; pistil- 

 late scales narrowly oblong, truncate or emarginate and mu- 

 cronate; perigynia longer than the scales, 4 mm. long, sub- 

 erect, oblong-ovoid, faintly but distinctly nerved, sparsely 

 pubescent, rather long-beaked, minutely 2-toothed at apex; 



stigmas 3. Apr.-May. Open woods on hillsides and in low 



mountains; Honshu (Musashi, Kai, Mikawa, Owari, and 

 Mino Prov.) . 



97. Carex pisiformis Boott. C. amphora Fr. & Sav. 



Hommonji-suge. Rhizomes long-creeping; culms 30- 



40 cm. long, glabrous, slender; leaf-blades flat, about 3 mm. 

 wide, the basal sheaths brownish to stramineous, slightly 

 fibrous; spikes 3, distant, the terminal staminate, 2.5-3 cm. 

 long, the others pistillate, short-cylindric, peduncled, rather 

 loosely flowered, 1.5-2 cm. long, the bracts short, long-sheath- 

 ing; pistillate scales obovate, pale green, rounded to truncate 

 and mucronate at apex; perigynia slightly longer than the 

 scales, 3.5 mm. long, suberect, obovate-ellipsoid, nerved, pu- 

 bescent, abruptly short-beaked, the apex 2-toothed; stigmas 3. 



Apr.-May. Open woods in hills; Honshu (sw. Kanto 



Distr.) ; rather common. 



98. Carex tenuinervis Ohwi. C. pseudostrigosa Lev. & 

 Van't., pro parte; C. alterni flora var. tenuinervis (Ohwi) 



Ohwi TsuRU-NASHi-o-iTo-suGE. Rhizomes densely tufted; 



culms 20-30 cm. long, slender; leaf-blades flat, 2-2.5 mm. 

 wide, the basal sheaths pale or stramineous; spikes 3, the 

 terminal staminate, linear, 2-3 cm. long, pale, the others 

 pistillate, broadly linear, 1-1.5 cm. long, erect, somewhat 

 loosely flowered, the bracts leaflike, sheathing at base; pistil- 

 late scales obovate-elliptic, pale green, rounded and cuspidate; 

 perigynia longer than the scales, 2.5 mm. long, nearly erect, 

 obovoid, glabrous, faintly nerved, abruptiy short-beaked, the 



beak scabrous, minutely 2-toothed; stigmas 3. Apr.-May. 



Kyushu. 



99. Carex tashiroana Ohwi. No-suge. Rhizomes 

 densely tufted; culms 20-30 cm. long, glabrous; leaf-blades 

 1.5-2.5 rrun. wide; spikes 2 or 3, slightly distant, erect, the 

 terminal staminate, 1.5-2 cm. long, pale green, the others 

 pistillate, broadly linear, loosely 5- to 10-flowered, 1-2.5 cm. 

 long, the bracts setaceous, sheathing at base; pistillate scales 

 pale, short-awned; perigynia nearly as long as the scales, 2 

 mm. long, obovate-elliptic, faintly nerved, short pubescent, ab- 

 ruptiy short-beaked, the beak recurved, 2-toothed at apex; 



stigmas 3. Apr. Honshu (Aki Prov.); rare. This may be 



an aberrant form of C. tenuinervis. 



100. Carex sachalinensis F. Schmidt. Rhizomes long- 

 creeping; culms slender, 15-30 cm. long, nearly glabrous; leaf- 

 blades flat, soft, 2-3 mm. wide; spikes 2-4, distant, erect, the 

 terminal staminate, linear, 1-2 cm. long, the others pistillate, 

 short-cylindric, on long-exserted peduncles 7-15 mm. long, the 

 lowest one sometimes nearly radical, the bracts short, long- 

 sheathing at base; pistillate scales obovate, pale, usually mu- 

 cronate; perigynia longer than the scales, erect, obovoid to ob- 

 ovoid-oblong, usually glabrous, usually with an abrupt erect 

 beak, often scabrous on the margins, hyaline and minutely 2- 

 toothed at apex; stigmas 3. Very polymorphic, with the fol- 

 lowing varieties: 



Var. sachalinensis. C. pseudoconica Fr. & Sav.; C. pisi- 

 fomis var. sachalinensis (F. Schmidt) Kuekenth.; C. \orsa\o- 



viensis Lev. Gongen-suge. Bracts long-sheathing at base, 



with blades shorter than the spikes; perigynia longer than the 



scales, 3 mm. long, erect, glabrous, nerved. May-July. 



Damp woods in mountains; Hokkaido, Honshu (n. centr. 

 distr.). Sakhalin and s. Kuriles. 



Var iwakiana Ohwi. Ko-ito-suge. Closely resembles 

 var. sachalinensis but the perigynia distinctly 3-angled, slightly 

 hairy. Honshu (Ivvaki Prov.). 



Var. longiuscula Ohwi. C. nikpmontana Akiyama 



MiYAMA-AO-suGE. Spikes loosely flowered; perigynia to 4 



mm. long, gradually long-beaked. Coniferous woods in 



mountains; Honshu (centr. distr.). 



Var. conicoides (Honda) Ohwi. C. conicoides Honda 



Watari-suge. Differs from var. arimaensis in the broader 

 leaves, 2.5 to 3 mm. wide, and long-sheathing bracts shorter 



than the spikes; plant with long leafy stolons. Apr.-May. 



Kyushu; rare. 



Var. pineticola (Ohwi) Ohwi. C. pineticola Ohwi 



Matsu-kaze-suge. Akin to var. conicoides; pistillate spikes 

 densely flowered and somewhat tawny; perigynia 2.5 mm. 

 long and often sparsely pubescent. Pine woods near sea- 

 coasts; Honshu (Shimosa Prov.) ; rare. 



