Flora of North America species comparison

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Carex laxiculmis var. copulata

Carex laxiculmis var. laxiculmis
Photo is of parent taxon

spreading sedge
Photo is of parent taxon

carex à tiges faibles, spreading sedge
Leaves

usually bright green;

widest blade 5.3–8.3 mm wide.

usually glaucous;

widest blade 6.4–11.8 mm wide.
Longest

staminate spike 6–20(–23) mm.

staminate spike (10–)12–25 mm.
2n

= 44, 46.

Carex laxiculmis var. copulata

Carex laxiculmis var. laxiculmis
Phenology Fruiting spring–early summer. Fruiting spring–early summer.
Habitat Low, wet, deciduous or mixed deciduous-evergreen forests, mesic slopes to along edges of springs, seeps, and streams, usually clay soils Low, wet, deciduous or mixed deciduous-evergreen forests, along edges of springs, seeps, and streams, usually clay soils
Elevation 0–1000 m (0–3300 ft) 0–1000 m (0–3300 ft)
Distribution
from FNA
AL; AR; IA; IL; IN; KY; MI; MO; NC; OH; TN; VA; WI; WV; ON
from FNA
AL; AR; CT; DC; DE; GA; IA; IL; IN; KY; MA; MD; ME; MI; MO; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WI; WV; ON
Discussion

Carex laxiculmis var. copulata has been treated as a variety of C. digitalis or C. laxiculmis, as a distinct species, and as a hybrid between C. digitalis and C. laxiculmis. Regular pairing during metaphase-I indicates that C. laxiculmis var. copulata is not a by-product of hybridization (R. F. C. Naczi 1999). In lateral spikes, a proximal sterile scale or scale subtending a staminate flower clearly places the affinity of this variety with C. laxiculmis rather than C. digitalis (C. T. Bryson 1980).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 23, p. 446. FNA vol. 23.
Parent taxa Cyperaceae > Carex > sect. Careyanae > Carex laxiculmis Cyperaceae > Carex > sect. Careyanae > Carex laxiculmis
Sibling taxa
C. laxiculmis var. laxiculmis
C. laxiculmis var. copulata
Synonyms C. digitalis var. copulata, C. ×copulata
Name authority (L. H. Bailey) Fernald: Rhodora 8: 183. (1906) unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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