Carex aquatilis - upper flowers staminate, lower pistillate, multiple flowers; upright; culms thick, smooth, rounded scale brown w/ pale midrib, spike produced C. atrofusca apical spike staminate, capititox. See C. misandra. leaves 3-4mm wide, wider than 1cm. labial spike on drooping peduncles. scales ovate, perigynia broader than scale - long located, transversed margin lowest bract short, bristly-like with brown sheath C. bigelovii spike produced SCABROUS culm perigynia short braked lowest bract short, bristly-like with brown sheath shorter than inflorescence SCALES BLACK. BLACK AURICLES AT BASE OF LOWEST BRACT marina = amblyorrhyncha C. maritima C. mumbroganica terminal spike staminate, often w/ smaller staminate spike at base. lateral spikes pistillate, sessile, or short-stalked lowest bract LEAF-LIKE, shorter than inflorescence C. misandra capititox, glabrous culm leaves usually curled, conspicuously dried (leaves at base) lower bract w/ long sheath + short blade terminal spike drooping - Mobilitas. Rearranged flowers above on terminal spike scale ovate. perigynia LONGER than scales C. vaniflora spike on long produce drooping light midrib on bract bracts short, dark. C. rotundata grey-green w/ runners for 1-2 yrs culms stiff, smooth long bract but shorter than flower; lowest often dimidiate or reflexed C. rupicola single terminal spike. culms from short creeping rhizome. DISSEXUAL SPIKE, with several staminate flowers at tip. scale persistent, broad. Perigynia erect yellowish brown C. sayanica long sweeping rhizomes. yellowish green leaves culm slender often curved APICAL 1-2 spikes staminate, lateral 1-2 pistillate arising on long caryophyllous peduncles DROOPING Scales acute, dark brown; Perigynia brown, longer than scale, elliptical, reddish brown. abruptly contract & short bract C. scirpoides culms in dense rows front stout, dark brown scaly rhizome. (trunk flat). may acute - SCABROUS, about 3mm broad SINGLE TERMINAL SPIKE ANOTHERS CONSPICUOUS DURING FLOWERING. UNISEXUAL SPIKE C. subspathacea loosely capitulate with thin yellowish-green runners. culm curved, glabrous 2-4 spikes, upper 10mm long, lateral pistillate - scales or short spike. few flowered lower bract broad at base, glany as INFLORESCENCE coalial salt marshes C. ussuriensis C. virginata