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Key to Carex, [26x] Section 17a Glaucescentes: section Glaucescentes (Pendulinae)

Cyperaceae

Carex

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1
Awn of the pistillate scale tapering gradually into the scale; perigynium 2-ribbed, and also distinctly and evenly nerved between the ribs; [of swamps and marshes]
 ⇒ Carex joorii

(c) Ward, Scott G
(c) Ward, Scott G
1
Awn of the pistillate scale emerging from a retuse notch in the apex of the scale; perigynium 2-ribbed, obscurely nerved between the ribs; [generally of acid seepages, pocosins, and blackwater situations, often associated with Pinus serotina].

(c) Goldman, Douglas - CC-BY-SA
(c) Ward, Scott - CC-BY
(c) Ward, Scott G
  2
Lowest pistillate spike drooping, on a peduncle 1-4 cm long; perigynia reddish-glaucous, lacking nerves; achenes slightly longer than wide
 ⇒ Carex glaucescens

(c) Fleming, Gary P.
  2
Lowest pistillate spike erect, sessile or with a peduncle up to 1 cm long; perigynia white-glaucous, rather distinctly 6-8 nerved; achenes as wide as long
 ⇒ Carex verrucosa

(c) Ward, Scott G