Carex scirpoidea subsp. convoluta

(Kükenthal) D. A. Dunlop

Novon 7: 355. 1998.

Basionym: Carex scirpoidea var. convoluta Kükenthal in H. G. A. Engler, Pflanzenr. 20[IV,38]: 81. 1909
Treatment appears in FNA Volume 23. Treatment on page 551. Mentioned on page 550.

Plants cespitose; rhizomes inconspicuous. Culms erect, (9.2–) 19.5–35(–38) cm. Leaves: sheaths and bases from previous year’s leaves absent; blades narrowly V-shaped in cross section, to 23 cm × 1.8 mm, widest leaves of pistillate culm less than 1.5 mm wide. Scales ovate, 2.4 × 1.2 mm. Perigynia ovate, 1.5–2.6 × 1–1.2 mm, less than or equal to 2.5 times long as wide, body tightly enveloping achene for entire length and width. Achenes 1–1.5 × 0.6–0.9 mm.

Phenology: Fruiting early Jun–Sep.
Habitat: Prairie pavement barrens
Elevation: 200 m


Carex scirpoidea subsp. convoluta is the most geographically restricted of the subspecies and is distinguished by narrowly V-shaped leaves, especially of the flowering shoot, a strongly cespitose habit, and conspicuously more flowering shoots per plant than other subspecies.

Selected References


Lower Taxa

Debra A. Dunlop +
(Kükenthal) D. A. Dunlop +
Carex scirpoidea var. convoluta +
Ont. +  and Mich. +
Prairie pavement barrens +
Fruiting early Jun–Sep. +
Illustrated +  and Endemic +
Undefined sect. Scirpoideae +  and Undefined sect. Trysanolepis +
Carex scirpoidea subsp. convoluta +
Carex scirpoidea +
subspecies +