Carex missouriensis

P. E. Rothrock & Reznicek

Novon 11: 220, figs. 1(left), 3C, 4, 10. 2001.

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

Plants densely cespitose, to 200 culms together; rhizomes may appear elongate in old clumps. Culms 45–90 cm; vegetative culms few, inconspiculous, usually fewer than 12 leaves, not strikingly 3-ranked. Leaves: sheaths glabrous, individually indistinct Y-shaped hyaline band reaching 0–8 mm below the collar, summit U-shaped or truncate, extending 0–2 mm beyond collar, smooth; distal ligules 2–4 mm; blades 3–6 per fertile culm, 2.5–25 cm × 1.8–3.2 (–4) mm. Inflorescences open to congested, erect to nodding, pale or golden brown, 2–4.5 cm × 7.5–19 mm; proximal internode 3.5–12 mm; 2d internode 3–10 mm; proximal bracts scalelike or often with bristle tips shorter than or equaling inflorescences. Spikes 3–8, distant, distinct, globose to ovoid or conic, 8–14 × 4.5–9.5 mm, base rounded to acute, apex acute, obtuse, or rounded. Pistillate scales pale yellowish-brown or occasionally copper-brown tinged, with narrow yellowbrown midstripe, lanceolate or lanceovate, 3.7–4.4 mm, reaching base to middle of perignyium beaks, margin whitish to brownish hyaline, apex membranaceous, curled, acuminate or awned to 0.7 mm. Staminate scales acuminate-awned. Anthers (1.8–) 2.2–3.6 mm. Perigynia 15–80 on larger spikes, loosely ascending, light green, yellowbrown, or copper-brown, green or brown winged, inconspicuously 0–3 (–5) -veined adaxially, 0–8-veined abaxially, 1–2 veins in winged margin, broadly elliptic to ovate, flat or concavo-convex except over achene, (4.2–) 4.6–6.7 (–7.1 in larger perigynia) × 2.5–4 mm, 0.5–0.7 mm thick, herbaceous, ± opaque, with achene not visible through adaxial face, margin flat, including wing 0.6–1.1 mm wide smooth; beak tip, strongly flattened, 2–2.8 mm, serrulate-margined to apex, abaxial suture pale or copper-brown, distance from beak tip to achene 2.6–4.2 mm. Achenes elliptic to ± orbiculate, 1.6–2.2 × 1.2–1.6 mm, 0.5–0.7 mm thick, apiculum to 0.4–1.1 mm. 2n =50, 52, 54.


Phenology: Fruiting early summer.
Habitat: Prairie swales
Elevation: 100–400 m

Distribution

V23 664-distribution-map.jpg

Ill., Ind., Iowa, Kans., Mo., Nebr.

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 missouriensis"
54 +, 52 +  and 50 +
copper-brown +  and pale +
not visible +
elliptic;more or less orbiculate +
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 cm0 mm <br />0 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
membranaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
P. E. Rothrock & Reznicek +
shortened +
indistinct +
y--shaped +
persistent +
rounded +  and acute +
not enlarged +
serrulate-margined +
flattened +
2mm +  and 2.8mm +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (25 cm250 mm <br />0.25 m <br />) +
3 (?) +  and 6 (?) +
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 +
fertile +  and vegetative +
round +  and trigonous +
45 cm450 mm <br />0.45 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Ill. +, Ind. +, Iowa +, Kans. +, Mo. +  and Nebr. +
100–400 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Prairie swales +
open +  and congested +
golden brown +  and pale +
erect +  and nodding +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
whitish +  and brownish hyaline +
0.6mm +  and 1.1mm +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, veinless +  and veined +
Fruiting early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
often;scale-like +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
adventitious +
staminate +  and pistillate +
copper-brown tinged +  and pale yellowish-brown +
basal +  and proximal +
lanceovate;lanceolate +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
globose;ovoid or conic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
u--shaped +
Carex missouriensis +
Carex sect. Ovales +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
plant +  and cespitose +