Carex obnupta L. Bailey
Slough sedge

Family:  Cyperaceae

Habit:  Forming beds and dense raised clumps from rhizomes, 3 to 15 dm. long.

Distribution:  Central western California and San Francisco Bay area, north to British Columbia in marshes and wet meadows.

Seed unit:  Achene, purplish-black with lighter center and narrow hyaline margins.

Seed:  Achene hard, lenticular, ovoid, completely surrounded by smooth or toothed perigynium.

Embryo:  Embryo is basal extending less than half the length of the seed in starchy endosperm.

Purity instructions:  Pure seed definition:
AOSA: PSU#27 - Intact achene whether or not a seed is present. Piece of broken achene larger than one-half of the original size, unless no seed is present.

Average pure seed units per gram:  1,203 seeds per gram (based on AOSA pure seed units only from 2 samples received for testing from 2001 to 2002). 

Range of percent pure seed:  99%

Range of percent inert:  1%

Description of inert:  Plant material.

Planting instructions:  400 seeds, TB, 21 days @ 20-35°C; prechill not recommended.