Carex angustata

Boott in W. J. Hooker

in W. J. Hooker, Fl. Bor-Amer. 2: 218. 1839.

IllustratedEndemic
Synonyms: Carex egregia Mackenzie Carex eurycarpa T. Holm Carex oxycarpa T. Holm
Treatment appears in FNA Volume 23. Mentioned on page 330.

Plants not cespitose. Culms acutely angled, 30–110 cm, scabrous. Leaves: basal sheaths redbrown; sheaths of proximal leaves bladeless, scabrous, fronts with redbrown spots, prominently ladder-fibrillose, apex redbrown, U-shaped; blades hypostomic, 4–7 mm wide, papillose abaxially. Inflorescences: proximal bract subequal to inflorescence, 3–6 mm wide. Spikes erect; staminate 1–2; pistillate 3–4; proximal pistillate spike 2.5–7 cm × 3–5 mm, base attenuate. Pistillate scales redbrown or black, longer than perigynia, apex acute, awnless. Perigynia ascending, pale-brown with redbrown spots on apical 1/2, 1–3-veined abaxially, somewhat flattened, loosely enclosing achenes, ellipsoid or obovoid, 2.2–3 × 1.2–2 mm, dull, apex obtuse or acute, papillose; beak redbrown, 0.2–0.5 mm. Achenes not constricted, dull. 2n = 66, 68.


Phenology: Fruiting Jul–Aug.
Habitat: Wet meadows along streams
Elevation: 300–2300 m

Distribution

V23 689-distribution-map.jpg

Calif., Idaho, Oreg., Wash.

Discussion

Carex angustata is a member of the C. stricta complex based on the scabrous, red-brown, bladeless ladder-fibrillose sheaths, the veined perigynia, the hypostomic leaves, and the low chromosome numbers. It is distinguished from sympatric members of the group, C. nudata and C. senta, by the rhizomatous habit, the few-veined perigynia, and the scabrous stems and from the often-sympatric C. aquatilis by the scabrous, veined sheaths and the veined perigynia.

Selected References

None.

Lower Taxa

None.
... more about "Carex angustata"
biconvex +
not constricted +
awnless +  and ladder-fibrillose +
redbrown +  and redbrown spots +
papillose +
redbrown spots +
Lisa A. Standley +, Jacques Cayouette +  and Leo Bruederle +
Boott in W. J. Hooker +
shortened +
not +  and fibrous +
attenuate +
bidentate +  and emarginate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
papillose +
m--shaped +  and v--shaped +
4mm;7mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
redbrown +  and brown +
30 cm300 mm <br />0.3 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
prophyllate +, subsessile +, pedunculate +  and staminate +
Calif. +, Idaho +, Oreg. +  and Wash. +
300–2300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
u--shaped +
biconvex +  and trigonous +
Wet meadows along streams +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Fruiting Jul–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
short-sheathing +, sheathless +  and leaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
in W. J. Hooker, Fl. Bor-Amer. +
adventitious +
black +  and redbrown +
basal +  and proximal +
2-keeled +
ladder-fibrillose +  and veined +
cylindric +
Illustrated +  and Endemic +
pistillate +  and staminate +
2.5 cm25 mm <br />0.025 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex egregia +, Carex eurycarpa +  and Carex oxycarpa +
Carex angustata +
Carex sect. Phacocystis +
species +
, +  and staminate +
plant +  and not cespitose +