Carex scabriuscula

Mackenzie

Bull. Torrey Bot. Club 35: 268. 1908.

IllustratedEndemic
Synonyms: Carex gigas (T. Holm) Mackenzie Carex scirpoidea var. gigas T. Holm
Treatment appears in FNA Volume 23. Treatment on page 552. Mentioned on page 550, 553.

Plants cespitose; rhizomes never conspicuous. Culms erect, (30–) 35–65 cm. Leaves: sheaths and bases from previous year’s leaves persistent; ligules rounded; blades glabrous adaxially. Inflorescences unispicate and multispicate (often with 1–2 short-peduncled lateral spikes of same sex), mostly erect, ellipsoid; primary inflorescence bracts leaflike, rarely scalelike, equal to or longer than inflorescences. Scales redbrown to purple, lanceolate, to 3 × 1 mm, shorter than perigynia, margins hyaline, central midrib extending to scale apex, apex acute. Perigynia purple-black, lanceolate, (2.5–) 3 (–4) × (1–) 1.6 (–2.5) mm, narrower than subtending scale, apex tapering, distal 1/3 with few short hairs; beak 0.5 mm, orifice oblique; rachilla absent. Achenes to 2.8 × 1.4 mm, loosely enveloped by perigynia, occupying 1/3–2/3 width and 1/3–3/4 length of perigynia. 2n = 58.


Phenology: Fruiting late May–Jul.
Habitat: Serpentine soils
Elevation: 1000–2000 m

Discussion

The type locality for Carex scabriuscula is not known. Type specimens refer only to a wet meadow in the Cascade range. Searches, using information from Cusick’s notebooks, have not relocated the species in the Cascades.

The sectional alignment of this taxon also is problematic. Historically, it has been placed in the Scirpinae; ongoing research suggests it should be excluded from the section based on its atypical pubescence, chromosome number, leaf anatomy, multispicate inflorescences, and unique achene micromorphology.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number.

... more about "Carex scabriuscula"
0 cm0 mm <br />0 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
trigonous +
smaller +
0mm;1.4mm +
Debra A. Dunlop +
Mackenzie +
shortened +
not +  and fibrous +
rounded +  and tapering +
Scirpinae +
bidentate +  and emarginate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
v--shaped +
0mm;20mm +
prophyllate +  and sheathless +
2-ranked +  and arranged +
ascending +  and appressed +
filiform +
parallel +  and divergent +
terete +, rolled +  and plicate +
puberulent +  and glabrous +
round +  and trigonous +
35 cm350 mm <br />0.35 m <br /> (65 cm650 mm <br />0.65 m <br />) +
Calif. +  and Oreg. +
1000–2000 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Serpentine soils +
multispicate +  and unispicate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
persistent +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, veined +  and veinless +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
3 cm30 mm <br />0.03 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Fruiting late May–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Bull. Torrey Bot. Club +
adventitious +
redbrown +  and purple +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
basal +  and proximal +
lanceolate +
0mm;1mm +
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 +
Carex gigas +  and Carex scirpoidea var. gigas +
Carex scabriuscula +
Carex sect. Scirpinae +
species +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
plant +  and cespitose +