Carex reniformis

(L. H. Bailey) Small

Fl. S.E. U. S., 220, 1328. 1903.

IllustratedEndemic
Basionym: Carex straminea var. reniformis L. H. Bailey Mem. Torrey Bot. Club 1: 73. 1889
Treatment appears in FNA Volume 23. Mentioned on page 376.

Plants cespitose; rhizomes appearing elongate in old clumps, 1.5–5 mm wide, mostly 1 shoot per node. Culms 25–75 cm; vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked. Leaves: sheaths with adaxial hyaline band, summits U-shaped; distal ligules 1.7–3.6 mm; blades 4–5 per fertile culm, 10–25 cm × 1.8–3.2 mm. Inflorescences open, yellow-green, 2–5 cm × 6–14 mm; proximal internode 5–11 mm; 2d internode 5–13 mm; proximal bracts scalelike or with bristle tip shorter than or equaling inflorescences. Spikes 3–6, distant, distinct, ellipsoid to ovoid, 7–12 × 5–10 mm, base rounded to acute, apex rounded. Pistillate scales white-hyaline with green midstripe, ovate, 2–3.5 mm, reaching base of perignyium beaks, narrower than perigynia, apex obtuse to rounded. Perigynia 15–80 in larger spikes, ascending, straw colored, green distally, inconspicuously veined on each face, reniform to orbiculate, flat, 4–5.3 × 3.5–4.5 (–4.9) mm, 0.4–0.6 mm thick, margin flat, including wing 1–1.5 mm wide, finely granular-papillose (30X); beak pale or green at tip, flat, ciliate-serrulate, abaxial suture with conspicuous white-hyaline margin, distance from beak tip to achene 2–2.7 mm. Achenes elliptic, 1.8–2.2 × 1.2–1.5 mm, 0.4–0.6 mm thick. 2n = 80.


Phenology: Fruiting late spring.
Habitat: Wet woods, bottomlands
Elevation: 0–300 m

Distribution

V23 667-distribution-map.jpg

Ala., Ark., Fla., Ga., Ill., Ky., La., Miss., Mo., N.C., Okla., S.C., Tenn., Tex., Va.

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Carex reniformis"
biconvex +
smaller +
0.4mm +  and 0.6mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
(L. H. Bailey) Small +
shortened +
persistent +
rounded +  and acute +
not enlarged +
Carex straminea var. reniformis +
ciliate-serrulate +
Green (?) +  and Pale (?) +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
4 (?) +  and 5 (?) +
v--shaped +
1.8mm;3.2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
inconspicuous +
fertile +  and vegetative +
round +  and trigonous +
25 cm250 mm <br />0.25 m <br /> (75 cm750 mm <br />0.75 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +  and Va. +
0–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet woods, bottomlands +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white-hyaline +
conspicuous +
granular-papillose +
1mm +  and 1.5mm +
with (1-)3-6(-30) bristles and/or scales +
green +  and straw colored +
0.4mm +  and 0.6mm +
Fruiting late spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
with bristle tip;scale-like +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Fl. S.E. U. S., +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
adventitious +
white-hyaline +
basal +  and proximal +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
distinct +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ellipsoid;ovoid +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
u--shaped +
Carex reniformis +
Carex sect. Ovales +
species +
plant +  and cespitose +