Carex scirpoidea subsp. convoluta

(Kükenthal) D. A. Dunlop

Novon 7: 355. 1998.

IllustratedEndemic
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

Discussion

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

None.

Lower Taxa

None.
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
trigonous +
smaller +
0.6mm;0.9mm +
Debra A. Dunlop +
(Kükenthal) D. A. Dunlop +
shortened +
not +  and fibrous +
rounded +  and tapering +
Carex scirpoidea var. convoluta +
bidentate +  and emarginate +
0.1 cm1 mm <br />0.001 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (23 cm230 mm <br />0.23 m <br />) +
v--shaped +
prophyllate +  and sheathless +
2-ranked +  and arranged +
ascending +  and appressed +
filiform +
parallel +  and divergent +
terete +, rolled +  and plicate +
to scale apex +  and midway +
puberulent +  and glabrous +
round +  and trigonous +
19.5 cm195 mm <br />0.195 m <br /> (35 cm350 mm <br />0.35 m <br />) +
Ont. +  and Mich. +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Prairie pavement barrens +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
acute +  and rounded +
narrow +  and broad +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, veined +  and veinless +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
equal 0-2.5 times long +  and less than +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Fruiting early Jun–Sep. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
inconspicuous +
adventitious +
redbrown +  and purple +
2.4 cm24 mm <br />0.024 m <br /> (?) +
basal +  and proximal +
persistent +
cylindric +
Illustrated +  and Endemic +
pistillate +  and staminate +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Undefined sect. Scirpoideae +  and Undefined sect. Trysanolepis +
Carex scirpoidea subsp. convoluta +
Carex scirpoidea +
subspecies +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
plant +  and cespitose +
0mm +  and 1.5mm +