THE GENUS CAREX IN CALIFORNIA 



43 



Refs.: Carex specifica Bailey, Mem. Torr. Club 1: 21 (1889); Kuk. in Engler, Pflzr. 420 : 

 198 (1909). C. scoparia Schk. var. fulva W. Boott in S. Wats. Bot. Cal. 2: 237 (1880), excluding Hille- 

 brand 2317 and Oregon specimens; same type. "C. arida Schw. & Torr." W. Boott, 1. c. C. lanci- 

 fructus Mackenzie, Bull. Torr. Club 43: 607 (1917), type from Volcano Creek, Tulare Co., Hall & 

 Babcock 5472. 



41. C. unilateralis Mackenzie n. sp. Cespitose from very short creeping 

 rootstocks, the culms erect, slender, obtusely triangular, slightly roughened above; 

 leaf -blades 2-4 mm. wide, flat, little roughened; spikes 6-20, gynaecandrous, ovoid, 

 5 mm. long, 3-4 mm. wide, densely aggregated into an ovoid head 1-3 cm. long; 

 lowest 2-3 bracts elongated and much exceeding head, dilated and strongly brown- 

 ish hyaline-margined at base, the'Towermost erect, appearing like a continuation of 

 the culm, the head unilateral; scales ovate, strongly cuspidate, nearly equaling 

 perigynia, reddish with lighter center and narrow hyaline margins; perigynia appres- 

 sed, ovate-lanceolate, thin, 3-4 mm. long, 1.5 mm. wide, nerveless or nearly so 

 ventrally, rounded and substipitate at base, wing-margined serrulate above, taper- 

 ing into a short beak, the beak flat, serrulate nearly to apex, reddish tipped, not 

 hyaline, at length bidentate. 



Type Locality: Alton, Humboldt Co., California (Tracy 3783). 



Wet meadows and copses, northwestern California to British Columbia. 



Loc: Alton, Humboldt Co., Tracy 3783. 



Refs.: Carex unilateralis Mackenzie. " C. athrostachya Olney" Kuk. in Engler, Pflzr. 

 420 : 193, f. 32A, B (1909). 



42. C. athrostachya Olney. (Fig. 18). Densely cespitose, the rootstocks 

 very short, the culms 1-9 dm. high, strict, slender, sharply triangular, smooth or 

 somewhat roughened above; leaf-blades 1.5-2.5 mm. wide; spikes 4-20, ovoid, 5 to 7 

 mm. long, 3-4 mm. wide, densely aggregated into 



an ovoid head, 1-3 cm. long; lowest 2-3 bracts 

 elongated and much exceeding head, dilated and 

 strongly brownish hyaline-margined at base, spread- 

 ing; scales ovate or lanceolate-ovate, shorter than 

 the perigynia, acute or short-cuspidate, brown with 

 hyaline margins; perigynia ascending, ovate-lance- 

 olate, thin, 3-4 mm. long, 1.5 mm. wide, more or 

 less nerved ventrally, rounded and substipitate at 

 base, wing-margined, serrulate above, tapering into 

 a beak 1 mm. long, the tip slender, terete, brownish, 

 hyaline at apex, obliquely cut dorsally. 



Type Locality: Yosemite Valley, California 

 (Brewer 1650). 



Wet meadows and copses, Saskatchewan to 

 Colorado, California and Yukon. In California it is 

 found in the northern counties, throughout the 

 Sierra Nevada, in the San Bernardino Mts., 

 and in the Coast Ranges as far south as Mendocino 

 Co. 



Locs.: Beebe's Ranch, Humboldt Co., Tracy 3373; 

 Kennedys Meadows, A. L. Grant 222; Cow Creek, Tuolumne 

 Co., Jepson 6518; Sissons, Goldsmith 13, 13a; Hockett Meadow, 

 Tulare Co., Dudley 1030; Kern Lakes, Dudley 2046; Yosemite, 

 Abrams 4633, Geo. B. Grant 4280; Lake Tahoe region, Abrams 

 4872; Yosemite, Brewer 1650, Bolander 6213, Canby, Torrey 

 552; Jess Valley to Blue Lake, Griffiths & Hunter 417; Hetch- 

 Hetchy, Congdon, Jepson 3477; Sierra Nevada, Lemmon; Bear 

 Valley, Parish 3459, 3271, 1573; Kaweah region, Purpus 

 5144; Mineral King, Coville & Funston 1405; Truckee, Hitch- 

 cock 256, L. S. Smith 673; upper San Joaquin, Madera Co., 

 Congdon; Sissons, Hall & Babcock 4062; Truckee River, Placer 



Fig. 18. 



Carex athrostachya 

 Olney. 



a, inflorescence, X 1 ; 6, scale, 

 c, perigynium, X 8. 



X8; 



