Carex shinnersii

P. E. Rothrock & Reznicek

Novon 11: 225, fig. 3E. 2001.

Treatment appears in FNA Volume 23. Treatment on page 376. Mentioned on page 335, 338, 339, 375.

Plants densely cespitose, to 200 culms together; rhizomes appearing elongate in old clumps. Culms 40–110 cm; vegetative culms inconspicuous with 9–17 leaves mostly clustered near apex of culm. Leaves: sheaths abaxially green or with pale intervenal areas with scattered, horizontal green septa, adaxially hyaline band broad, smooth, summit concave to truncate, equaling to extending 2 mm beyond collar; ligules 1.8–4.8 mm; blades 4–6 per fertile culm, 2.5–35 cm × 1.8–4.2 mm. Inflorescences erect to slightly arching, compact to elongated, pale-brown, 2.8–5.9 cm × 6–17 mm; proximal internode 3.5–12 (–17) mm; 2d internode 3–9 (–13) mm; proximal bracts scalelike, often with bristle tips shorter than inflorescences. Spikes (3–) 4–7 (–11), distinct, ovoid, 9.5–20.5 × 6–9 mm, base rounded to tapered, apex rounded. Pistillate scales pale-brown with narrow yellow-green to brown midstripe prominent to tip, lanceolate, (3.7–) 4–5.2 mm, (2.6–) 2.9–3.7 (–4.2) times as long as wide, reaching base to middle of perigynium beak, shorter than perigynia by (0.4–) 0.6–1.4 (–1.6) mm, margin hyaline, apex firm and herbaceous, flat or inrolled, with subulate tip or awned. Staminate scales acuminate. Anthers (1.8–) 2.2–3.6 mm. Perigynia 15–80 on larger spikes, ascending, yellowish green to brown with paler margins, conspicuously 7–11-veined abaxially, faintly (0–) 2–8-veined adaxially, wings with 1–4 veins, ovate, elliptic, or ± orbiculate, planoconvex, (4.5–) 4.8–6.1 (–6.3) × 2.5–3.8 mm, 0.5–0.7 mm thick, herbaceous, opaque with achene not clearly visible through adaxial face of perigynium, base rounded, margin flat, including wing 0.5–1.3 mm, smooth; beak yellowish green to pale-brown, strongly flattened, (1.2–) 1.5–2.1 (–2.3) mm, serrulate-margined to apex, abaxial suture pale or copper-brown, distance from beak tip to achene (2–) 2.3–3.3 mm. Achenes ovate to elliptic, 1.8–2.4 × 1.3–1.7 mm, 0.5–0.7 mm thick, apiculum to 0.4–0.9 mm. 2n = 60.


Phenology: Fruiting early summer.
Habitat: Seasonally wet to dry, grassy ditches, swales, and slopes, often in clayey soils
Elevation: 100–300 m

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 shinnersii"
copper-brown +  and pale +
0.2 cm2 mm <br />0.002 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
ovate;elliptic +
smaller +
0.5mm +  and 0.7mm +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
bidentatate +
papillose +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
P. E. Rothrock & Reznicek +
shortened +
persistent +
rounded +  and tapered +
not enlarged +
serrulate-margined +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (35 cm350 mm <br />0.35 m <br />) +
4 (?) +  and 6 (?) +
v--shaped +
1.8mm;4.2mm +
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 +
40 cm400 mm <br />0.4 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
Ark. +, Kans. +, Okla. +  and Tex. +
100–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Seasonally wet to dry, grassy ditches, swales, and slopes, often in clayey soils +
erect +  and slightly arching +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
paler +  and hyaline +
yellow-green +  and brown +
with (1-)3-6(-30) bristles and/or scales +
(0-)2-8-veined +  and 7-11-veined +
yellowish green +  and brown +
Fruiting early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
adventitious +
staminate +  and pistillate +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
(2.6-)2.9-3.7(-4.2) +
basal +  and proximal +
acuminate;lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
distinct +
0.95 cm9.5 mm <br />0.0095 m <br /> (2.05 cm20.5 mm <br />0.0205 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
concave +  and truncate +
Carex shinnersii +
Carex sect. Ovales +
species +
subulate +
1 +  and 4 +
plant +  and cespitose +
planoconvex +, orbiculate +, elliptic +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +