Carex holostoma

Drejer

Naturhist. Tidsskr. 3: 447. 1841.

Common names: Carex à bec entier
Illustrated
Synonyms: Carex alpina var. holostoma (Drejer) L. H. Bailey
Treatment appears in FNA Volume 23. Treatment on page 408. Mentioned on page 402, 407.

Plants loosely cespitose, long-rhizomatous. Culms 10–30 cm, distally finely scabrous. Leaves 1.5–3 mm wide. Inflorescences: proximal bract shorter than or equaling inflorescences; spikes contiguous, overlapping, short-oblong or cylindric, 3–8 × 2–2.5 mm; proximal spikes sometimes erect, distinct, separate, short-pendunculate; lateral 1–2 (–3) spikes pistillate, of similar length; terminal spike staminate, spikes can hidden by larger, overtopping lateral spikes. Pistillate scales dark-brown or black, margins hyaline, ovate, shorter or equaling, as broad as perigynia, midvein lighter colored than body, conspicuous, sometimes raised, prominent, mucronate. Perigynia ascending, brown, obscurely veined, elliptic or obovate, 2–2.5 × 1.25–1.75 mm, apex beakless or abruptly beaked, papillose; beak to 0.2 mm, truncate, smooth. Achenes nearly filling body of perigynia. 2n = 60.


Phenology: Fruiting Jul–Sep.
Habitat: Lakeshores, meadows, fens, bogs
Elevation: 0–500 m

Distribution

V23 734-distribution-map.jpg

Greenland, Nfld. and Labr., N.W.T., Nunavut, Que., Yukon, Alaska, arctic Eurasia

Discussion

Carex holostoma has most likely been overlooked and has a more continuous range than indicated.

Selected References

None.

Lower Taxa

None.
... more about "Carex holostoma"
trigonous +
smaller +
beaked +  and beakless +
papillose +
David F. Murray +
Drejer +
shortened +
cuneate +  and more or less rounded +
bidentate +  and entire +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex à bec entier +
papillose +  and smooth +
red +  and purple +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Greenland +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Que. +, Yukon +, Alaska +  and arctic Eurasia +
0–500 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Lakeshores, meadows, fens, bogs +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
lighter colored +
prominent +, raised +  and conspicuous +
mucronate +
with (1-)3-6(-30) bristles and/or scales +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.125 cm1.25 mm <br />0.00125 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
Fruiting Jul–Sep. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like;,;thread-like +
ladder-fibrillose +  and veined +
purple +, tinged red +  and dotted +
short-pendunculate +
Naturhist. Tidsskr. +
black without yellowbrown +  and brown +
adventitious +
black +  and dark-brown +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +
overlapping +  and contiguous +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric;short-oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
2 +  and 3 +
papillate +
deciduous +
2-3(-4)-fid +
Carex alpina var. holostoma +
Carex holostoma +
Carex sect. Racemosae +
species +
plant +  and cespitose +