Carex abrupta

Mackenzie

Bull. Torrey Bot. Club 43: 618. 1917.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 349. Mentioned on page 332, 342, 343, 351.

Plants densely cespitose. Culms 18–66 cm. Leaves: sheaths adaxially white-hyaline, often tinged brown distally, summits U-shaped or rounded, sometimes prolonged beyond collar; distal ligules 1–3 (–4.5) mm; blades 3–6 per fertile culm, 10–30 (–45) cm × 1.5–3.7 (–4.9) mm. Inflorescences dense or open, brown and green, 1.2–2.2 cm × (6–) 9–18 mm; proximal internode 1–3 mm; 2d internode 1–2 mm, these 2 internodes collectively less than 1/3 as long as inflorescences; proximal bracts bristlelike, shorter than inflorescences. Spikes 4–9, distinct or densely aggregated and individually indistinct, usually ovoid to broadly ovoid, 4.4–10.8 × 2.7–8.4 mm, base and apex acute to rounded. Pistillate scales redbrown or chestnut to coppery, with green, gold, or light-brown midstripe, usually ovate, 2.4–3.9 mm, shorter than perigynia, width less than or equal to perigynia, margin white, 0–0.05 mm wide, apex obtuse to acuminate. Perigynia appressed-ascending to ascending-spreading, redbrown, coppery, or chestnut, conspicuously (5–) 7–10-veined abaxially, conspicuously 3–8-veined adaxially, veins reaching top of achene, elliptic to lanceovate, planoconvex to biconvex or, sometimes, flat around achene, (2.9–) 3.6–5.4 × 1–2.1 mm, 0.4–0.5 (–0.6) mm thick, margin flat, including wing usually 0.2–0.3 mm wide, often incurved adaxially, perigynia then boatshaped, ciliate-serrulate on distal body; beak coppery or dark-brown at tip, occasionally narrowly flattened, cylindric, unwinged, usually less than 1 mm, ± entire for 0.5–0.8 mm, abaxial suture usually with conspicuous white margin, distance from beak tip to achene (1.6–) 2–2.3 mm. Achenes narrowly compressed elliptic to ovate-quadrate, 1.2–1.8 × 0.7–1.1 mm, (0.3–) 0.4–0.5 mm thick.


Phenology: Fruiting summer.
Habitat: Moist mountain meadows and slopes
Elevation: 1400–3300 m

Distribution

V23 602-distribution-map.jpg

Calif., Idaho, Nev., Oreg.

Discussion

Selected References

None.

Lower Taxa

None.

"equal" is not a number."+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex abrupta"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
elliptic;ovate-quadrate +
smaller +
0.4mm +  and 0.5mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Mackenzie +
shortened +
persistent +
acute +  and rounded +
not enlarged +
cylindric +  and flattened +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
30 cm300 mm <br />0.3 m <br /> (45 cm450 mm <br />0.45 m <br />) +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 (?) +  and 6 (?) +
v--shaped +
1.5mm;3.7mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
18 cm180 mm <br />0.18 m <br /> (66 cm660 mm <br />0.66 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Calif. +, Idaho +, Nev. +  and Oreg. +
1400–3300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist mountain meadows and slopes +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0 +  and 1/3 +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
conspicuous +
0.2mm +  and 0.3mm +
light-brown +, gold +  and green +
with (1-)3-6(-30) bristles and/or scales +
3-8-veined +  and (5-)7-10-veined +
chestnut +, coppery +  and redbrown +
appressed-ascending +  and ascending-spreading +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Bull. Torrey Bot. Club +
adventitious +
chestnut +  and coppery +
basal +  and proximal +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
distinct +
0.44 cm4.4 mm <br />0.0044 m <br /> (1.08 cm10.8 mm <br />0.0108 m <br />) +
usually ovoid;broadly ovoid +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.84 cm8.4 mm <br />0.0084 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
rounded +  and u--shaped +
Carex abrupta +
Carex sect. Ovales +
species +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
plant +  and cespitose +