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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Carex

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image of plant
Show caption*© Scott Ward
1 Spike 1 per culm, all flowers attached to the main stem in a terminal spike
image of plant
Show caption*© Gary P. Fleming
image of plant
Show caption*© Gary P. Fleming
image of plant
Show caption*© Keith Bradley
1 Spikes 2 or more per culm (some flowers in lateral spikes)
image of plant
Show caption*© Zihao Wang, some rights reserved (CC BY), uploaded by Zihao Wang
..2 All flowers staminate
image of plant
Show caption*© Scott Ward
..2 At least some flowers pistillate.
image of plant
Show caption*© Jay Horn
image of plant
Show caption*© Paul Marcum
image of plant
Show caption*© Scott Ward
image of plant
Show caption*© Scott Ward
....3 Stigmas 2; achenes flat or biconvex in cross-section (lenticular)
image of plant
Show caption*© Paul Marcum
image of plant
Show caption*© Andrew Lane Gibson
image of plant
Show caption*© Gary P. Fleming
....3 Stigmas (2-) 3 (-4); achenes trigonous or terete in cross-section.
image of plant
Show caption*© Gary P. Fleming
......4 Body of perigynium glabrous or papillose (if papillose, the papillae shorter than wide).
image of plant
Show caption*© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward
........5 Bracts sheathless or with sheath < 4 mm long (rarely longer, and then the sheath shorter than the diameter of the stem)
image of plant
Show caption*© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward
........5 Bracts (at least the lower) with sheath > 4 mm long (and longer than the diameter of the stem)
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