Carex tenax

Chapman ex Dewey

Amer. J. Sci. Arts, ser. 2, 19: 254. 1855.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 489. Mentioned on page 487, 488.

Plants loosely cespitose; rhizomes stout. Culms 20–50 cm, smooth, glabrous. Leaf-blades V-shaped in cross-section when young, 1.5–2.8 mm wide, usually involute, proximally puberulent. Inflorescences: proximal bracts sheathless or sheath not more than 2 (–5) mm; lateral spikes 10–20 × 5–9 mm, all in distal 1/2 of stem; terminal spike 10–32 × 1.5–3 mm. Pistillate scales 3–5-veined, ovate, 2.8–5 × 1.6–2.2 mm, proximal ones shorter than perigynia, apex acute. Staminate scales 3-veined, 4.5–5.5 × 1.6–2.2 mm. Perigynia 20–30-veined, subsessile, ovoid to obovoid, 4–6 × 1.9–2.4 mm, pilose, hairs not more than 0.2 mm; beak distinct or obscure, to 0.5 mm. Achenes sessile, 3–3.5 × 1.9–2 mm, almost filling bodies of perigynia.


Phenology: Fruiting late spring–summer.
Habitat: Dry to dry-mesic, longleaf pine and sand-hill savannas
Elevation: 0–200 m

Distribution

V23 906-distribution-map.jpg

Ala., Fla., Ga., La., Miss., N.C., S.C., Tex.

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Carex tenax"
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
trigonous +
1.9mm;2mm +
Peter W. Ball +
Chapman ex Dewey +
shortened +
tapering +
straight +
distinct +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
well-developed +
m--shaped +  and v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
1.5mm +  and 2.8mm +
purple-brown +, red +  and brown +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +  and Tex. +
0–200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to dry-mesic, longleaf pine and sand-hill savannas +
prophyllate +, pedunculate +  and pistillate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
subsessile +  and 20-30-veined +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Fruiting late spring–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Amer. J. Sci. Arts, ser. +
adventitious +
3-veined +, staminate +, 3-5-veined +  and pistillate +
brown +, green +  and hyaline +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
basal +  and proximal +
1.6mm;2.2mm +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex tenax +
Carex sect. Hallerianae +
species +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
plant +  and cespitose +