Carex albonigra Mackenzie
Family: Cyperaceae
blackandwhite sedge,  more...
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Max Licher  
Plants densely cespitose. Culms 10-30 cm, distally finely scabrous. Leaves 2.5-5 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes contiguous, overlapping, erect, distinct, short-pendunculate, short-oblong or elongate, 8-20 × 4-7 mm; lateral 1-3 spikes pistillate pedunculate, of similar length; terminal spike gynecandrous. Pistillate scales light to dark brown with hyaline margins, broadly lanceolate or ovate, equaling perigynia, midvein same color as body, inconspicuous, raised, prominent, short-mucronate. Perigynia ascending, chestnut, veinless, ovate, 3-3.5 × 2-2.5 mm, apex abruptly beaked, papillose; beak 0.3-0.4 mm, entire or shallowly bidentate, smooth. Achenes nearly filling body of perigynia. 2n = 52, 54. Fruiting Jun-Aug. Alpine meadows, fellfields; 300-3900 m; Alta., B.C., N.W.T., Yukon; Alaska, Ariz., Calif., Colo., Idaho, Mont., N.Mex., Utah, Wash., Wyo. Specimens from California determined as Carex albonigra are provisionally assigned here; these need further study because they differ from the typical Rocky Mountain forms.

Carex albonigra image
Max Licher  
Carex albonigra image
Max Licher  
Carex albonigra image
Max Licher  
Carex albonigra image
Max Licher  
Carex albonigra image
Max Licher  
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