Carex scirpoidea subsp. scirpoidea

Common names: Carex faux-scirpe
Illustrated
Synonyms: Carex athabascensis F. J. Hermann Carex michauxii Schweinitz Carex scirpiformis Mackenzie Carex scirpina Tuckerman Carex scirpoidea var. europaea Kükenthal Carex scirpoidea var. scirpiformis (Mackenzie) O’Neill & Duman Carex wormskioldiana
Treatment appears in FNA Volume 23.

Plants cespitose; rhizomes short. Culms erect, (5–) 10–35 (–40) cm mm, widest leaves of pistillate culm more than 1.5 mm wide. Leaves: sheaths and bases from previous year’s leaves absent; blades widely V-shaped in cross-section, 31 cm × 2.5 mm. Scales ovate, 2.5 × 1.5 mm. Perigynia ovate, (1.8–) 2–2.5 (–3) × 1–1.2 (–1.5) mm, less than or equal to 2.5 times as long as wide, body tightly enveloping achenes for entire length and width. Achenes 1.5–1.8 × 0.8–1.2 mm.


Phenology: Fruiting late May–Sep, depending on elevation.
Habitat: In calcareous soils
Elevation: 0–1200 m

Distribution

V23 1044-distribution-map.jpg

Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que., Sask., Yukon, Alaska, Colo., Idaho, Maine, Mich., Minn., Mont., Nev., N.H., N.Y., N.Dak., Oreg., Utah, Vt., Wash., Wyo., Europe (Norway), e Asia (Russian Far East), e Asia (Chukotka)

Discussion

Carex scirpoidea subsp. scirpoidea is the widest ranging of the subspecies and includes taxa formerly recognized by other caricologists. G. Kükenthal (1909) recognized C. scirpoidea var. europaea from a single locality in Norway. These plants are short in stature, like plants of C. scirpoidea subsp. scirpoidea from alpine habitats, and values for most morphologic characters fall within the normal range for subsp. scirpoidea. Another taxon, C. scirpiformis, was recognized by K. K. Mackenzie (1908) and treated at the varietal rank by H. O’Neill and M. Duman (1941) based on wide, hyaline pistillate scale margins and light-colored pubescence. Width of the hyaline portion of the scale margins and the color of pubescence are extremely variable characters in the group. F. J. Hermann (1957) recognized C. athabascensis as a separate species based on the overall robust habit and small, ovoid achenes. Achenes from the type specimens fall at the wide end of the range of variation of achene width in C. scirpoidea.

Carex scirpoidea subsp. scirpoidea is recognized by the lack of persistent leaf bases on the flowering shoots, ovate perigynia that are tightly enveloped by the perigynia on all sides, and leaves widely V-shaped in transverse section.

Selected References

None.

Lower Taxa

None.
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
trigonous +
smaller +
0.8mm;1.2mm +
Debra A. Dunlop +
Michaux +
shortened +
not +  and fibrous +
rounded +  and tapering +
Scirpinae +
bidentate +  and emarginate +
0.1 cm1 mm <br />0.001 m <br /> (?) +
31 cm310 mm <br />0.31 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 +
Carex faux-scirpe +
puberulent +  and glabrous +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Maine +, Mich. +, Minn. +, Mont. +, Nev. +, N.H. +, N.Y. +, N.Dak. +, Oreg. +, Utah +, Vt. +, Wash. +, Wyo. +, Europe (Norway) +, e Asia (Russian Far East) +  and e Asia (Chukotka) +
0–1200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
In calcareous soils +
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 +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
equal 0-2.5 times as-long-as wide +  and less than +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Fruiting late May–Sep, depending on elevation. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Fl. Bor.-Amer. +
adventitious +
redbrown +  and purple +
2.5 cm25 mm <br />0.025 m <br /> (?) +
basal +  and proximal +
persistent +
cylindric +
Illustrated +
pistillate +  and staminate +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex athabascensis +, Carex michauxii +, Carex scirpiformis +, Carex scirpina +, Carex scirpoidea var. europaea +, Carex scirpoidea var. scirpiformis +  and Carex wormskioldiana +
Carex scirpoidea subsp. scirpoidea +
Carex scirpoidea +
subspecies +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
plant +  and cespitose +