Carex nudata

W. Boott in S. Watson

in S. Watson, Bot. California 2: 241. 1880.

IllustratedEndemic
Basionym: Carex hallii L. H. Bailey 1887
Synonyms: Carex acutina L. H. Bailey Carex bishallii C. B. Clarke Carex nudata var. anomala L. H. Bailey Carex suborbiculata Suksdorf Carex tenacissima
Treatment appears in FNA Volume 23. Treatment on page 389. Mentioned on page 379, 381, 390, 396.

Plants cespitose, flowering from first-year shoots. Culms acutely angled, 35–70 cm, glabrous. Leaves: basal sheaths redbrown; sheaths of proximal leaves bladeless, scabrous, fronts with redbrown spots, prominently ladder-fibrillose, apex redbrown, U-shaped; blades hypostomic, 2–4 mm wide, papillose abaxially. Inflorescences: proximal bract shorter than inflorescence, 1–2 mm wide. Spikes erect; staminate 1–2; pistillate 2–4; proximal pistillate spike 2–4.5 cm × 5–6 mm, base cuneate. Pistillate scales dark redbrown to black, shorter than perigynia, apex obtuse, awnless. Perigynia ascending, pale-brown with redbrown spots on apical 1/2, often blackish apically, 5–9-veined on each face, somewhat flattened, loosely enclosing achenes, thin-walled, ovoid or ellipsoid, 2.2–4 × 1.2–1.8 mm, leathery, dull, apex rounded or obtuse, papillose; beak redbrown, 0.1–0.3 mm. Achenes not constricted, dull. 2n = 70, 72.


Phenology: Fruiting Jun–Jul.
Habitat: Dense tussocks in rocky streambeds
Elevation: 0–1500 m

Discussion

Carex nudata is also a member of the C. stricta group and is distinguished from sympatric members of the group by flowering from first-year shoots and having very narrow inflorescence bracts and somewhat elongated, heavily veined perigynia. It has a very distinctive growth form and habitat, dense tussocks among rocks in streambeds.

Selected References

None.

Lower Taxa

None.
... more about "Carex nudata"
biconvex +
not constricted +
awnless +  and ladder-fibrillose +
redbrown +  and redbrown spots +
papillose +
redbrown spots +
Lisa A. Standley +, Jacques Cayouette +  and Leo Bruederle +
W. Boott in S. Watson +
shortened +
not +  and fibrous +
cuneate +
Carex hallii +
bidentate +  and emarginate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
papillose +
m--shaped +  and v--shaped +
2mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
redbrown +  and brown +
35 cm350 mm <br />0.35 m <br /> (70 cm700 mm <br />0.7 m <br />) +
prophyllate +, subsessile +, pedunculate +  and staminate +
Calif. +, Oreg. +  and Wash. +
0–1500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
u--shaped +
biconvex +  and trigonous +
Dense tussocks in rocky streambeds +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
thin-walled +  and 5-9-veined +
blackish +  and pale-brown +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Fruiting Jun–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
short-sheathing +, sheathless +  and leaflike +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
in S. Watson, Bot. California +
adventitious +
dark redbrown +  and black +
basal +  and proximal +
2-keeled +
ladder-fibrillose +  and veined +
cylindric +
Illustrated +  and Endemic +
pistillate +  and staminate +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex acutina +, Carex bishallii +, Carex nudata var. anomala +, Carex suborbiculata +  and Carex tenacissima +
Carex nudata +
Carex sect. Phacocystis +
species +
, +  and staminate +
plant +  and cespitose +