Difference between revisions of "Carex williamsii"
Bull. New York Bot. Gard. 2: 159. 1901.
FNA>Volume Importer |
FNA>Volume Importer |
||
Line 33: | Line 33: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Carex williamsii | name=Carex williamsii | ||
− | |||
|authority=Britton | |authority=Britton | ||
|rank=species | |rank=species | ||
Line 48: | Line 47: | ||
|publication year=1901 | |publication year=1901 | ||
|special status= | |special status= | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_872.xml |
|genus=Carex | |genus=Carex | ||
|section=Carex sect. Chlorostachyae | |section=Carex sect. Chlorostachyae |
Revision as of 21:12, 16 December 2019
Culms to 15(–30) cm. Leaf blades filiform, channelled, 2–8 cm × 0.25–1 mm. Terminal spike androgynous or staminate, ± level with lateral spikes, 2–8 × 0.6–1 mm. Lateral spikes 2–5, usually suberect, 3–10-flowered, 4–10 × 2–2.5 mm. Pistillate scales pale brown with hyaline margins and paler midvein, ovate, 1.8–2.2 × 1–1.4 mm, apex obtuse. Staminate scales brown with hyaline margins and paler midvein, oblong-lanceolate, 2.5–3 × 0.8 mm, apex obtuse or mucronate. Perigynia distinctly veined, lanceolate, 2.3–3.1 × 0.7–1 mm; beak 0.5–1 mm, margins entire or with 1 or 2 basal setae. Achenes obovoid, 1.2–1.5 × 0.7 mm.
Phenology: Fruiting summer.
Habitat: Fens, sedge meadows, moist tundra
Elevation: 0–500 m
Distribution
Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, n Asia.
Discussion
Á. Löve et al. (1957) reported a chromosome number of 2n = 18 for a North American plant of Carex williamsii; that number has not been confirmed. T. V. Egorova (1999) reported 2n = 46 for Asian plants of C. williamsii, which is within the range of chromosome counts reported for other species in sect. Chlorostachyae. It is not clear whether the terminal spike of C. williamsii is consistently androgynous or whether it can also be staminate. Androgynous spikes have only 1–3 perigynia that are usually hidden by the lateral spikes.
Selected References
None.