Carex longii

Mackenzie

Bull. Torrey Bot. Club 49: 373. 1923.

Illustrated
Treatment appears in FNA Volume 23. Treatment on page 368. Mentioned on page 255, 336, 337, 362, 363, 364, 367.

Plants densely cespitose. Culms 30–120 (–140) cm; vegetative culms with few leaves clustered at apex. Leaves: sheaths adaxially conspicuously green-veined nearly to collar, with a narrow hyaline band or sharp Y-shaped hyaline region at collar; adaxially firm, summits U-shaped, finely papillose; distal ligules 1.8–4.4 (–6) mm; blades 2–4 (–6) per fertile culm, 8–30 cm × 2–4.5 mm. Inflorescences ± erect, usually open, green to brown, 1–4.5 (–6) cm × 5–14 mm; proximal internode 1–14 mm; 2d internode 3–8 mm; proximal bracts scalelike, often with bristle tips. Spikes 3–10, distinct, ellipsoid to ovoid, 6–13 (–17) × 3.8–7 mm, base rounded or obtuse, apex obtuse to broadly acute; staminate portion 2 mm or less. Pistillate scales white-hyaline, becoming pale silvery brown with age, with pale or green center, broadly lanceolate, 2.2–3.7 mm, shorter and narrower than perigynia, apex obtuse. Perigynia appressed-ascending, green to drab brown, conspicuously 5–many-veined on each face, obovate, flat except over achene, 3–4.6 × 1.6–2.6 (–2.8) mm, 0.4–0.5 mm thick, margin flat, including wing 0.5–0.8 mm wide; beak green to brown at tip, flat, broadly triangular, ciliate-serrulate, abaxial suture with conspicuous white hyaline margin, distance from beak tip to achene 1.4–2.2 mm. Achenes oblong, 1.3–1.7 × 0.7–1 mm, 0.4–0.5 mm thick, apiculum less than 0.4 mm; style straight. 2n = 58, 62.


Phenology: Fruiting early–mid summer (fall in southern part of range).
Habitat: Wet or seasonally wet, sandy soils, fields, thickets, ditches, pond edges, open woods, occasionally bogs
Elevation: 0–800 m

Distribution

V23 648-distribution-map.jpg

N.S., Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., Wis., W.Va., Mexico, West Indies (Haiti), Bermuda, Central America, South America, Pacific Islands (Hawaii), New Zealand

Discussion

Carex longii is introduced in the Hawaiian Islands and New Zealand.

Several regional floras have incorrectly applied the name Carex albolutescens to C. longii (P. E. Rothrock 1991). In the southern part of the range, decumbent culms of C. longii can root at their nodes during the fall and produce flowering culms the following spring. A similar habit of vegetative spread is frequent in C. tribuloides, less common in C. albolutescens, C. ozarkana, and C. projecta, and rare in C. cristatella, C. scoparia and C. vexans.

P. E. Rothrock et al. (1997) reported putative hybrids between Carex longii and C. straminea.

Selected References

None.

Lower Taxa

None.

"less" is not a number."+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex longii"
smaller +
0.4mm +  and 0.5mm +
bidentatate +
papillose +
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Mackenzie +
shortened +
persistent +
obtuse +  and rounded +
not enlarged +
ciliate-serrulate +
Green (?) +  and Brown (?) +
triangular +
8 cm80 mm <br />0.08 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 (?) +  and 4 (?) +
v--shaped +
2mm;4.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
fertile +  and vegetative +
round +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
0.44 cm4.4 mm <br />0.0044 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
N.S. +, Ont. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, Wis. +, W.Va. +, Mexico +, West Indies (Haiti) +, Bermuda +, Central America +, South America +, Pacific Islands (Hawaii) +  and New Zealand +
0–800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet or seasonally wet, sandy soils, fields, thickets, ditches, pond edges, open woods, occasionally bogs +
4.5 cm45 mm <br />0.045 m <br /> (6 cm60 mm <br />0.06 m <br />) +
green +  and brown +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white hyaline +
conspicuous +
0.5mm +  and 0.8mm +
with (1-)3-6(-30) bristles and/or scales +
green +  and drab brown +
appressed-ascending +
0.4mm +  and 0.5mm +
Fruiting early–mid summer (fall in southern part of range). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.1 cm1 mm <br />0.001 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Bull. Torrey Bot. Club +
y--shaped +  and sharp +
adventitious +
brown +, pale silvery +  and white-hyaline +
basal +  and proximal +
lanceolate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +
1.3 cm13 mm <br />0.013 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
distinct +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
ellipsoid;ovoid +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
straight +
deciduous +  and persistent +
2-3(-4)-fid +
papillose +
u--shaped +
Carex longii +
Carex sect. Ovales +
species +
plant +  and cespitose +