Carex joorii

L. H. Bailey

Proc. Amer. Acad. Arts 22: 72. 1887.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 422. Mentioned on page 420, 421.

Culms to 125 cm. Leaves: sheaths glaucous, fronts indistinctly veined, veins not persisting, apex thin, truncate or irregularly convex; blades 120 cm × 7–10 mm, glabrous. Inflorescences with 5–7 spikes, 30 cm; peduncle of lateral spikes to 6 cm; proximal bracts equaling inflorescences, 3–6 mm wide; lateral spikes divergent, 3–6 cm × 6–8 mm. Pistillate scales shorter and narrower than perigynia, apex acute, awn to 3 mm. Perigynia strongly divergent, redbrown, angles veined, faces prominently 6–8-veined, sessile, widely elliptic or somewhat obovate, 3.5–4.5 × 2.8–3.2 mm, base rounded, apex ± truncate proximal to beak, densely papillose with low, oblong or, rarely, minute, rounded papillae, not markedly glaucous; beak 0.3–0.5 mm, entire or minutely bidentate, teeth to 0.1 mm. Achenes rhomboid, 2.5–3 × 2.5–3 mm, base conspicuously broadened.


Phenology: Fruiting Aug–Sep.
Habitat: Seasonally saturated or inundated soils in moist, swampy, or bottomland woods, or stream banks
Elevation: 0–800 m

Distribution

V23 771-distribution-map.jpg

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

Discussion

Carex joorii is more robust than C. glaucescens and can be distinguished from C. glaucesens and C. verrucosa by the acute apex of the scale body, the strongly veined, squarrose perigynia with low, flattened papillae, and the broadened base of the achene. Occasional specimens have been observed with papillae characteristic of C. glaucescens; such specimens may result from hybridization.

Selected References

None.

Lower Taxa

None.
... more about "Carex joorii"
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rhomboid +
smaller +
2.5mm;3mm +
papillose +
minute +
Lisa A. Standley +
L. H. Bailey +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
shortened +
rounded +
broadened +
bidentate +  and entire +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
120 cm1,200 mm <br />1.2 m <br /> (?) +
more prominent +
m--shaped +
7mm;10mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
glaucous +, scabrous +  and glabrous +
reddish purple +
round +  and trigonous +
0 cm0 mm <br />0 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
Ala. +, Ark. +, Fla. +, Ga. +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.C. +, S.C. +, Tenn. +, Tex. +  and Va. +
0–800 m +
sessile +  and 6-8-veined +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
obovate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Seasonally saturated or inundated soils in moist, swampy, or bottomland woods, or stream banks +
30 cm300 mm <br />0.3 m <br /> (?) +
prophyllate +, pedunculate +, some +  and pistillate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
sessile +  and veined +
Fruiting Aug–Sep. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
long-sheathing +  and leaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Proc. Amer. Acad. Arts +
black +  and brown +
adventitious +
basal +  and proximal +
2-keeled +
shorter and narrower +
cylindric +
Illustrated +  and Endemic +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Pendulinae +
Carex joorii +
Carex sect. Glaucescentes +
species +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
not persisting +
plant +  and cespitose +