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Key to Carex, [26ss] Section 32 Rostrales: section Rostrales (Folliculatae)

Cyperaceae

Carex

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(c) Ward, Scott G
1 Perigynia 6.4-10.7 mm long, 2.6-3.9× as long as wide
(c) Smith, Jake - CC-BY-NC, permission granted to NCBG
1 Perigynia (8.3-) 10.5-15.6 mm long, 4-7× as long as wide.
(c) McCorquodale, David - CC-BY
  2 Widest leaf blades 1.6-3.5 (-4.2) mm wide; bract sheaths concave at the apex; [of MD northward]
(c) Fleming, Gary P.
  2 Widest leaf blades (3.5-) 5-18 mm wide; bract sheaths truncate to convex at the apex; [collectively widespread in our area].
(c) Goldman, Douglas - CC-BY-SA
    3 Pistillate scales usually awned (rarely merely cuspidate); pistillate scales (including the awn, if present) 0.5-1.2× as long as the perigynia; larger achenes 3.4-4.0 (-4.5) mm long (ca. (1.7-2.4x as long as wide); widest leaves of vegetative shoots 8-18 (-21) mm wide; pistillate spikes normally not staminate at apex (rarely with a few staminate flowers); [primarily of the Mountains and Piedmont]
(c) Bradley, Keith
    3 Pistillate scales acute or long-acuminate (rarely short-awned); pistillate scales (including the awn, if present) 0.3-0.6× as long as the perigynia; larger achenes 2.3-3.4 (-3.8) mm long (ca. 1.3-1.8x as long as wide); larger leaves mostly 4-12 mm wide; pistillate spikes normally staminate at apex; [primarily of the Coastal Plain]