Carex planostachys

Kunze

Suppl. Riedgräs., 138, plate 35. 1844.

Illustrated
Treatment appears in FNA Volume 23. Treatment on page 488. Mentioned on page 454, 487.

Plants loosely cespitose; rhizomes stout. Culms to 30 cm, short and long stems on same plant, scabrous. Leaf-blades V-shaped in cross-section when young, 1–2.5 mm wide, margins revolute, papillose, scabrous. Inflorescences: proximal bracts usually with sheath 2–5 mm; lateral spikes 5–11 × 3–4 mm, usually 1–2 distal and several basal; terminal spike 8–13 × 1.5–3 mm. Pistillate scales 5–7-veined, ovate, 4–4.5 × 1.5–2 mm, proximal ones longer than perigynia, apex acute to acuminate or mucronate. Staminate scales 5-veined, 4–5 × 1.5–2 mm. Perigynia 12–24-veined, veins on faces not more than 0.1 mm wide, most distinctly narrower than marginal veins, obovoid, 3–4.5 × 1.5–1.9 mm, puberulent; beak distinct, straight or slightly bent, 0.3–0.6 mm. Achenes subsessile, usually with 2 faces concave, 2.4–2.5 × 1.5–1.7 mm, apex obtuse to truncate.


Phenology: Fruiting late spring.
Habitat: Dry to mesic forests and scrub, on calcareous soils
Elevation: 200–700 m

Distribution

V23 904-distribution-map.jpg

Ark., Okla., Tex., e Mexico, Central America (Guatemala)

Discussion

Reports of Carex planostachys from Arizona are referable to C. lativena.

Selected References

None.

Lower Taxa

None.

"distinctly narrower" is not a number.

... more about "Carex planostachys"
0.24 cm2.4 mm <br />0.0024 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
trigonous +
1.5mm;1.7mm +
Peter W. Ball +
shortened +
tapering +
straight +
distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-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 +
1mm +  and 2.5mm +
purple-brown +, red +  and brown +
round +  and trigonous +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Ark. +, Okla. +, Tex. +, e Mexico +  and Central America (Guatemala) +
200–700 m +
concave +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to mesic forests and scrub, on calcareous soils +
prophyllate +, pedunculate +  and pistillate +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
papillose +
with (1-)3-6(-30) bristles and/or scales +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Fruiting late spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Suppl. Riedgräs., +
adventitious +
5-veined +, staminate +, 5-7-veined +  and pistillate +
brown +, green +  and hyaline +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
basal +  and proximal +
1.5mm;2mm +
cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Illustrated +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex planostachys +
Carex sect. Hallerianae +
species +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
puberulent +
1.5mm +  and 1.9mm +
plant +  and cespitose +