86 THE GENUS CAREX IN CALIFORNIA 



and Carex rostrata Stokes are the most abundantly collected of all North American 

 species of Carex. 



Locs.: Yosemite, Bolander 6212 (in part). Brewer 1640; Mono Valley, Brewer 1814; Mari- 

 posa Grove, Bolander 4999; Lake Tahoe, Brainerd; Truckee River, Nevada Co., Davy; Greenfield, 

 Kern Co., Davy 1830; Kings River, Lemmon; Snow Creek, Mariposa Co., Congdon; Donner Lake, 

 Heller 6989; Upper Kings Road, Brewer 2815; Unio Lake, Congdon; Santa Ana, Geis 559; San 

 Bernardino Valley, Parish 1052, 2085, 2105; Los Angeles, Davidson; Chagoopa Creek, Dudley 2277; 

 Soda Spgs., Dudley 1950; Mt. Whitney, Dudley 2509; Hockett Meadow, Dudley 1019; Wood, 

 Siskiyou Co., Dudley; upper Tuolumne, Bolander 5046 (in part); Kennedys Meadow, Tuolumne 

 Co., A. L. Grant 222a, 167, 223, 446; Sisson, Dudley, Brainerd; Jess Valley to Blue Lake, Griffiths & 

 Hunter 426; Igerna, Siskiyou Co., Heller 8095; Pasadena, McClatchie; Victorville, Mojave desert, 

 Parish 9705; Victorville, San Bernardino Co., Johnston 1781; El Monte, Los Angeles Co., Johnston; 

 Squaw Valley, Placer Co., L. S. Smith 562 (in part); Lake Tahoe, L. S. Smith 640; Stanislaus 

 Forest, Eggleston 9508; Upland, Johnston 4; Kings River Canon, Dudley 3227; Sisson, Jepson 5792. 



Refs.: Carex lanuginosa Michx., Fl. Bor. Am. 2: 175 (1803); Parish, Bull. S. Cal. Acad. 

 4: 67 (1905). C. pellita Muhl. in Willd. Sp. PI. 4: 302 (1805), "Habitat in humidis Pennsylvania!." 

 "C. mmatorhyncha Desv." Olney, S. Wats. Bot. King 373 (1871). C. filiformis L. var. latifolia 

 Boeckl. Linnaea 41: 309 (1877); based primarily on Carex lanuginosa Michx.; W. Boott in S. Wats. 

 Bot. Cal. 2: 250 (1880). "C. filiformis L. var. a-matorhyncha" W. Boott in S. Wats. Bot. Cal. 2: 

 250 (1880). C. lasiocarpa Ehrh. var. lanuginosa Kuk. in Engler, Pflzr. 420; 748 (1909). C. Watsoni 

 Olney, S. Wats. Bot. King 370 (1871), type from Carson City, Nevada, Watson 1246; W. Boott 

 in S. Wats. Bot. Cal. 2: 244 (1880). 



117. C. Sheldonii Mackenzie. Strongly stolonif erous ; culms very smooth 

 below the spikes, 6-9 dm. high, neither bright-colored nor fibrillose at the base; 

 leaves about four, the blades 5-6 mm. wide, 2-4 dm. long (or longer on sterile shoots), 

 sparingly short pubescent as are the sheaths, the latter dark-tinged at the mouth, 

 the basal breaking and slightly filamentose; staminate spikes 2-3, distant; pistillate 

 spikes usually 2, 2-5 cm. long, 8-10 mm. wide, rather closely 25-60-flowered; scales 

 ovate-lanceolate, acuminate or cuspidate; perigynia 5-6 mm. long, short-pubescent, 

 the beak bidentate, the teeth less than 1 mm. long. 



Type Locality: Clarks Creek, Oregon (Sheldon 8854). 

 Swamps, Idaho to Oregon and northeastern California. 



Loc: Jess Valley to Blue Lake, Griffiths & Hunter 429. 



Ref.: Cakex Sheldonii Mackenzie, Bull. Torr. Club 42: 618 (1915). 



XXXII. Extensa Fries. Culms slender, but strict, obtusely triangular, leafy 

 toward the base. Leaves sparingly septate-nodulose, the blades narrow. Spikes 

 2-10, the terminal usually staminate, the others pistillate, suborbicular to 

 oblong, densely flowered, 3 cm. or less long, the upper sessile and approximate, 

 the lower remote, peduncled, erect. Bracts leafy, more or less sheathing. Pistil- 

 late scales ovate, mostly reddish, copper or chestnut tinged. Perigynia ascending, 

 spreading or deflexed, membranaceous, smooth, many-nerved, somewhat in- 

 flated, obscurely triangular, rounded at the base, contracted into a bidentate 

 beak, the teeth very erect. Achenes triangular with flat sides, jointed with 

 the very slender straight or flexuous style. Stigmas 3. 



118. C. viridula Michx. Densely cespitose, not yellowish-green, the culms 

 0.7-4 dm. high, smooth, bluntly triangular; leaf-blades 1.5-3 mm. wide, canaliculate, 

 the sheaths not prolonged at mouth; staminate spike sessile or short-peduncled; 

 pistillate spikes 2-10, aggregated or the lower separate and exsert-peduncled, 4-12 

 mm. long, 4-7 mm. wide; scales ovate, much shorter than the perigynia, obtuse or 

 acutish; perigynia 2-3 mm. long, tapering at base, the whitish-tipped beak scarcely 

 x /2 length of body. 



Type Locality: "Hab. in Canada." 



Lake and river banks, Newfoundland to Alaska, south to New Jersey, Indiana, 

 Colorado, Utah and northern California, where known from a single collection in 

 Mendocino Co. 



