Chordorrhiza: Answers to key questions in Sedges (Carex) of Saskatchewan, Fascicle 3, Flora of Saskatchewan by Anna Leighton leading to this species. The answers are in the order you would normally work through the key.

	Stigmas 2; achenes lenticular. NOT [Stigmas 3; achenes three-sided, occasionally terete, though their shape may be concealed by flattened perigynia]
	Spikes 2 or more per culm, terminal and lateral; spike bracts present on lateral spikes; lowest spike bracts usually evident, often conspicuous, even in compact heads composed of densely bunched and indistinguishable spikes (except in C. maritima, C. chordorrhiza and C. microptera).  NOT [spikes 1 per culm, terminal; spike bracts absent]
	Individual spikes distinguishable in an open inflorescence, or indistinguishable in a compact head; spikes in any one inflorescence alike in appearance due to their similar composition (i.e. all are gynecandrous, androgynous, pistillate or staminate), sessile.  NOT [Individual spikes distinguishable in an open inflorescence (densely bunched in C. bicolor); spikes in any one inflorescence either markedly different in appearance (with terminal spike staminate and lateral spikes pistillate), or subtly different in appearance (with terminal spike gynecandrous and lateral spikes pistillate), sessile or stalked]
	Culms single, or a few together, well-spaced along conspicuous rhizomes or stolons.  NOT [Culms loosely to densely cespitose (occasionally mat-forming rather than in discrete clumps); rhizomes, if present, usually short with culms arising close together along them]
	Culms growing singly from stolons formed by reclining vegetative shoots that elongate horizontally and become overgrown by moss; rhizomes short and rarely collected; perigynia 2.5-3.5 (4.5) mm long, red-brown to dark brown, shiny, faintly to prominently red-brown nerved; plants of sphagnum bogs.  NOT [Culms growing directly from 1-3 mm wide, horizontal rhizomes.]