Carex tribuloides

Wahlenberg

Kongl. Vetensk. Acad. Nya Handl. 24: 145. 1803.

Common names: Carex tribuloïde
Illustrated
Treatment appears in FNA Volume 23. Treatment on page 363. Mentioned on page 364.

Plants densely cespitose. Culms 50–110 cm; vegetative culms with numerous leaves spaced evenly along distal 1/2. Leaves: sheaths adaxially green-veined nearly to collar, with ± triangular white-hyaline area to 3–8 mm proximal to collar, somewhat loose, expanded near summits, ± wing-angled, adaxially firm, summits U-shaped, somewhat thickened, slightly prolonged beyond collar; distal ligules 4–8 (–12) mm; blades 4–10 per fertile culm, 15–40 cm × (2–) 3–7 mm. Inflorescences erect, dense distally, brown, 2–5 (–8) cm × 10–20 mm; proximal internode 2–20 mm; 2d internode 2–13 mm; proximal bracts bristlelike, 1 (–8) cm. Spikes 6–15, overlapping or distinct, ovoid-oblong to globose, 6–12 (–16) × 4–8 mm, base rounded to tapered, apex rounded. Pistillate scales white-hyaline or pale silvery brown with green midstripe, lanceolate, (1.9–) 2.5–3 mm, 1/2 length of and narrower than perigynia, apex acute to acuminate. Perigynia more than (30–) 40 per spike, appressed-ascending to ascending, pale green to pale-brown, 3–6-veined abaxially, conspicuously or, occasionally, faintly, 2–4-veined adaxially, often somewhat asymmetric, ovatelanceolate to ovate-elliptic, planoconvex, 3–5.4 × 1.1–1.7 mm, 0.3–0.5 mm thick, margin flat, including wing 0.1–0.5 mm wide; beak tip flat, ciliate-serrulate, abaxial suture with golden to dark-brown hyaline margin, distance from beak tip to achene 1.4–2 mm. Achenes oblongovate, 1–1.8 × 0.6–0.9 mm, 0.3–0.5 mm thick. 2n = 70.

Distribution

V23 636-distribution-map.jpg

N.B., N.S., Ont., Que., Ala., Ark., Conn., D.C., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., N.C., N.H., N.J., N.Y., Nebr., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., Vt., W.Va., Wis., Mexico (Veracruz)

Discussion

Varieties 2 (2 in the flora).

See note under 146. Carex longii.

Selected References

None.

Key

1 Perigynia 3–5 times as long as wide. Carex tribuloides var. tribuloides
1 Perigynia 2.2–2.8(–3) times as long as wide. Carex tribuloides var. sangamonensis

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

... more about "Carex tribuloides"
biconvex +
smaller +
0.3mm +  and 0.5mm +
bidentatate +
papillose +
white-hyaline +
triangular +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Wahlenberg +
shortened +
persistent +
rounded +  and tapered +
not enlarged +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
4 (?) +  and 10 (?) +
v--shaped +
3mm;7mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex tribuloïde +
fertile +  and vegetative +
round +  and trigonous +
50 cm500 mm <br />0.5 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, N.C. +, N.H. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +, Wis. +  and Mexico (Veracruz) +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
not prophyllate +, sessile +  and pistillate +
basal +  and cauline +
golden +  and dark-brown hyaline +
0.1mm +  and 0.5mm +
with (1-)3-6(-30) bristles and/or scales +
2-4-veined +  and 3-6-veined +
pale green +  and pale-brown +
appressed-ascending +  and ascending +
0.3mm +  and 0.5mm +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
0.2 cm2 mm <br />0.002 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Kongl. Vetensk. Acad. Nya Handl. +
adventitious +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
brown +, pale silvery +  and white-hyaline +
basal +  and proximal +
lanceolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
herbaceous +  and membranous +
not differentiated +
wing-angled +
expanded +
Illustrated +
overlapping +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
distinct +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ovoid-oblong;globose +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
u--shaped +
Carex tribuloides +
Carex sect. Ovales +
species +
plant +  and cespitose +