Carex collinsii

Nuttall

Gen. N. Amer. Pl. 2: 205. 1818.

IllustratedEndemic
Basionym: Carex michauxii Dewey 1826 Carex subulata Michaux 1803
Treatment appears in FNA Volume 23. Treatment on page 517. Mentioned on page 516.

Culms trigonous with obtuse angles, 15–75 cm, to 3 mm diam. at base, glabrous. Leaves: sheaths to 2.5 cm; blades 30–35 cm × 5 mm. Inflorescences 10–30 cm; peduncles of proximal spikes to 4 cm; bracts 8–15 cm × 3–5 mm, shorter than inflorescences; lateral spikes 4–5, 6–10-flowered, 1 × 2.5 cm. Scales white or translucent with green midvein, ovate, body to 2.5 mm, less than 0.5 length of perigynia, herbaceous, apex acute, acuminate or mucronate, awn to 0.5 mm. Perigynia green with redbrown spots, 15–20 raised veins, to 15 × 1.2 mm; beak obliquely cut, herbaceous, teeth cartilaginous, to 1 mm; style curved, short stigmas protruding from perigynium at base of oblique orifice. Achenes yellowbrown, oblong, obtusely angled, 3 × 1 mm, tightly enclosed by perigynia, dull.


Phenology: Fruiting Jul–Aug.
Habitat: Shaded sphagnum bogs or seeps, characteristically under Chamaecyparis thyoides or Picea mariana
Elevation: 0–700 m

Distribution

V23 966-distribution-map.jpg

Conn., Del., Ga., Md., N.J., N.Y., N.C., Pa., R.I., S.C., Va.

Discussion

Nuttall did not designate a type specimen for Carex collinsii; he clearly did not intend that name to provide a legitimate name for the later homonym C. subulata Michaux, but listed both of the names. As K. K. Mackenzie (1931–1935, parts 2–3, pp. 704–705) pointed out, the locality of the type specimen for C. subulata Michaux is apparently erroneous because that species does not occur in Canada. The specimen in the Michaux herbarium (P, photo!) is C. collinsii.

Selected References

None.

Lower Taxa

None.

"lengthofperigynia" is not declared as a valid unit of measurement for this property.

... more about "Carex collinsii"
yellowbrown +
3 cm30 mm <br />0.03 m <br /> (?) +
angled;oblong +
smaller +
awned +  and cuspidate +
Lisa A. Standley +
Nuttall +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
shortened +
tapered +
Carex michauxii +  and Carex subulata +
straight +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
30 cm300 mm <br />0.3 m <br /> (35 cm350 mm <br />0.35 m <br />) +
v--shaped +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
8 cm80 mm <br />0.08 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ascending +  and appressed +
scale-like +  and leaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
purple-brown +
0mm +  and 3mm +
trigonous +
15 cm150 mm <br />0.15 m <br /> (75 cm750 mm <br />0.75 m <br />) +
Conn. +, Del. +, Ga. +, Md. +, N.J. +, N.Y. +, N.C. +, Pa. +, R.I. +, S.C. +  and Va. +
0–700 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Shaded sphagnum bogs or seeps, characteristically under Chamaecyparis thyoides or Picea mariana +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
2.5 cm25 mm <br />0.025 m <br /> (?) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and many-veined +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reflexed +  and spreading +
0 cm0 mm <br />0 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Fruiting Jul–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathing +  and leaflike +
Gen. N. Amer. Pl. +
obtriangular +
adventitious +
1-veined +  and pistillate +
translucent +  and white +
basal +  and proximal +
cylindric +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Illustrated +  and Endemic +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex collinsii +
Carex sect. Collinsiae +
species +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
redbrown spots +
15 +  and 20 +
plant +  and cespitose +