Carex lachenalii

Schkuhr

Beschr. Riedgräs. 1: 51, plate Y, fig. 79. 1801.

Common names: Carex de Lachenal
Illustrated
Synonyms: Carex bipartita var. austromontana F. J. Hermann Carex lagopina Wahlenberg
Treatment appears in FNA Volume 23. Treatment on page 314. Mentioned on page 300, 312, 315.

Plants ± loosely cespitose, in small clumps; rhizomes short. Culms weakly erect, sometimes slightly curving, 10–40 cm, smooth or nearly so. Leaves: sheaths pale-brown abaxially, inner band hyaline, slightly red tinged, concave at summit; ligules short; blades mid to dark green, flat, 5–15 cm × 1–2 mm, usually shorter than culms. Inflorescences erect, 1–2.5 cm × 5–12 mm; proximal bracts scalelike, usually 2–8 mm, shorter than spikes. Spikes 2–5, lateral spikes gynecandrous, approximate or 1–2 proximal slightly separate, containing 10–20 perigynia, short-oblong to suborbicular. Pistillate scales redbrown with pale-brown center and white-hyaline margins, oblongovate, subequaling perigynia, apex obtuse. Perigynia ascending, brownish green or in age brownish yellow, lightly or obscurely several-veined, obovate, 2–3.5 × 1–1.5 mm, base round-tapering, membranous; beak abaxial suture evident, entire or with few marginal teeth. Achenes pale to mid brown, elliptic, 1.2–1.5 × 1 mm, dull to slightly glossy. 2n = 64


Phenology: Fruiting Jul–Aug.
Habitat: Arctic and alpine meadows, peatlands, mossy banks of brooks
Elevation: 0–3700 m

Distribution

V23 549-distribution-map.jpg

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., Nunavut, Que., Yukon, Alaska, Colo., Idaho, Mont., Utah, Wash., Wyo., Europe, Asia, New Zealand

Discussion

Carex lachenalii shows a great deal of morphologic variation (e.g., some plants from Alaska with long perigynia and scales called C. lagopina var. longisquama Kükenthal); most variation has no evident taxonomic relevance. Short plants with relatively elongated beaks, described as C. bipartita var. austromontana F. J. Hermann seem to be geographically restricted to mountains of Colorado and Utah (F. J. Hermann 1970). Due to small and obscure differences, however, those plants are included here with some hesitation. Typical C. lachenalii also occurs in Colorado and Utah. Related species, C. furva Webb and C. co-optanda C. B. Clarke, which earlier were included in C. lachenalii occur in the mountains of Spain, Portugal, and Himalayas. The New Zealand plants represent an endemic subsp. parkeri (Petrie) Toivonen.

The name Carex bipartita Allioni has been widely used for the plant in North America. E. E. A. Janchen (1959) included that name as a rejected dubious name of Kobresia simpliciuscula (Wahlenberg) Mackenzie. The application of the name to Kobresia is due to L. H. Bailey (1889), who did so on the basis of specimens in Allioni’s herbarium. According to K. K. Mackenzie (1923), a Bellardi specimen matching Allioni’s plate and description is referable to C. lachenalii. If this is correct, there would appear to be no doubt that C. bipartita Allioni should replace C. lachenalii.

Selected References

None.

Lower Taxa

None.

... more about "Carex lachenalii"
with few marginal teeth +  and entire +
brown +  and pale +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
dull +  and slightly glossy +
biconvex +
smaller +
brownish yellow +
beaked +  and beakless +
papillose +  and smooth +
Heikki Toivonen +
Schkuhr +
shortened +
round-tapering +
membranous +
inconspicuous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
v--shaped +
1mm;2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex de Lachenal +
curving +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Que. +, Yukon +, Alaska +, Colo. +, Idaho +, Mont. +, Utah +, Wash. +, Wyo. +, Europe +, Asia +  and New Zealand +
0–3700 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Arctic and alpine meadows, peatlands, mossy banks of brooks +
red tinged +  and hyaline +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white-hyaline +
angled;rounded +
with (1-)3-6(-30) bristles and/or scales +
in age +  and brownish green +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Fruiting Jul–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Beschr. Riedgräs. +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex bipartita var. austromontana +  and Carex lagopina +
Carex lachenalii +
Carex sect. Glareosae +
species +
plant +  and cespitose +