familyCyperaceae
genusCarex
sectionCarex sect. Phaestoglochin
speciesCarex muehlenbergii
varietyCarex muehlenbergii var. enervis

Carex muehlenbergii var. enervis

Boott

Ill. Carex, 3: 124, plate 400. 1862.

Peter W. Ball
Common names: Carex à utricule lisse
IllustratedEndemic
Synonyms: Carex onusta Mackenzie Carex plana Mackenzie
Treatment appears in FNA Volume 23. Treatment on page 294. Mentioned on page 293.
Please click on the illustration for a higher resolution version.
Illustrator: Susan A. Reznicek

Copyright: Flora of North America Association

Pistillate scales 2–2.5 × 1.2–1.8 mm. perigynia veinless adaxially, 2.7–3.1 × 1.8–2.3 mm, beak 0.2–0.6 (–1.0) mm.


Phenology: Fruiting late spring–early summer.
Habitat: Dry grasslands, open forests, commonly on sand
Elevation: 10–300 m

Distribution

V23 505-distribution-map.jpg

Ont., Ala., Ark., Conn., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va.

Discussion

The distribution and ecology of Carex muehlenbergii var. enervis are unclear due to confusion with var. muehlenbergii. Plants of var. muehlenbergii that have a veinless perigynium have often been misidentified as var. enervis, but those plants are otherwise identical to var. muehlenbergii. Carex muehlenbergii var. muehlenbergii usually occurs on basic to slightly acidic soils; var. enervis often occurs on more acidic soils. It is not clear, however, whether that correlation is consistent.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Carex muehlenbergii var. enervis"
RDF feed
Achene length
0.19 cm1.9 mm <br />0.0019 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Achene shape
suborbiculate +
Achene size
smaller +
Achene width
1.9mm;2.1mm +
Anther fixation
basifixed +
Anther some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Apex architecture or shape
beaked +
Apex length
with awn;acute +
Apex pubescence
glabrous +
Apex shape
tapering;obtuse;acuminate or awned +
Apical tooth some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Author
Peter W. Ball +
Authority
Boott +
Awn atypical some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Awn some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Band coloration
white-hyaline +, hyaline +  and narrow +
Basal sheath texture
fibrous +
Base coloration
red tinged +  and brown +
Base shape
rounded +
Beak atypical some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Beak shape
bidentate +
Beak some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Blade presence
absent +
Blade prominence or shape
flat +
Blade shape
v--shaped +
Blade width
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Body quantity
2/3 +
Bract architecture
glumaceous +  and foliaceous +
Bract architecture or shape
leaflike +
Bract arrangement
2-ranked +  and arranged +
Bract orientation
ascending +  and appressed +
Bract quantity
1;many +
Bract shape
scale-like +  and leaflike +
Branch atypical quantity
3 (4) +
Branch quantity
2;3 +
Bristle atypical quantity
6;30 +
Bristle quantity
3;6 +
Cauline leaf architecture or shape
folded +
Cauline leaf arrangement
parallel +  and divergent +
Cauline leaf arrangement or course or shape
linear +
Cauline leaf orientation
Ascending (?) +
Cauline leaf prominence or shape
flat +
Cauline leaf shape
terete +, rolled +  and plicate +
Center architecture
3-veined +
Center shape
ovate +  and ovate-circular +
Common name
Carex à utricule lisse +
Cross-section pubescence
glabrous +
Culm shape
round +  and trigonous +
Culm some measurement
20 cm200 mm <br />0.2 m <br /> (90 cm900 mm <br />0.9 m <br />) +
Culm width
0.7mm;1.1mm +
Distal scale architecture
empty +
Distribution
Ont. +, Ala. +, Ark. +, Conn. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +  and W.Va. +
Elevation
10–300 m +
Embryo position
basal +
Endosperm quantity
abundant +
Flower architecture
open +, pistillate +  and staminate +
Flower position
hypogynous +  and subtending +
Flower quantity
single +
Flower reproduction
unisexual +
Front coloration
hyaline +
Front relief
rugose +
Fruits achene shape
biconvex +  and trigonous +
Habitat
Dry grasslands, open forests, commonly on sand +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Susan A. Reznicek +
Inflorescence architecture
branched +
Inflorescence arrangement
, +  and racemose +
Inflorescence length
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Inflorescence position or structure subtype
terminal +
Inflorescence quantity
1 +  and 2 +
Inflorescence width
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Inflorescences panicle architecture
pseudoumbel +
Inflorescences panicle development
modified +
Lateral spike architecture
sessile +  and pistillate +
Lateral spike reproduction
androgynous +
Leaf arrangement
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
Leaf position
basal +  and cauline +
Ligule presence
absent +
Ligule some measurement
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Ligule width
usually wider than long +
Locule quantity
1 +
Margin architecture or shape
serrulate +
Margin fusion
fused +
Margin shape
angled +
Midvein fusion
distinct +
Mouth coloration
yellowish +
Mouth size or width
thickened +
Number of lower taxa
0 +
Panicle arrangement
arranged +
Perianth life cycle
falling +
Perianth presence
absent +
Perianth quantity
with (1-)3-6(-30) bristles and/or scales +
Pericarp width
thin +
Perigynium architecture
veinless +
Perigynium coloration
pale green +  and yellowbrown +
Perigynium length
0.27 cm2.7 mm <br />0.0027 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
Perigynium orientation
spreading +  and ascending +
Perigynium quantity
8 (20) +
Perigynium shape
Planoconvex (Lanceolate) +
Perigynium width
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Phenology
Fruiting late spring–early summer. +
Pistil architecture
2-3(-4)-carpellate +
Pistil fusion
fused +
Pistil quantity
1 +
Prophyll architecture
pistillate +
Prophyll atypical quantity
0 (3) +
Prophyll position
subtending +
Prophyll quantity
3 (?) +  and 1 (?) +
Proximal bract architecture
sheathless +
Proximal bract architecture or shape
leaflike +
Proximal bract shape
filiform +
Proximal bract some measurement
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Proximal internode height or length or size
shorter +
Proximal internode variability
equaling +
Publication title
Ill. Carex, +
Publication year
1862 +
Raceme arrangement
arranged +
Reference
None +
Rhizome prominence
conspicuous +
Root derivation
adventitious +
Root texture
fibrous +
Scale architecture
pistillate +
Scale atypical quantity
6 (30) +
Scale coloration
hyaline with green +
Scale length
2mm (2.5mm) +
Scale position
basal +  and proximal +
Scale quantity
1;0;1 +
Scale reproduction
fertile +
Scale shape
2-keeled +
Scale width
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Seed quantity
1 +
Sheath arrangement or density
tight +
Sheath coloration
White spotted (Green) +
Sheath front coloration
Dotted red (?) +
Sheath front relief
rugose +
Sheath front texture
membranous +
Sheath shape
cylindric +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V23/V23 505.xml +
Special status
Illustrated +  and Endemic +
Spike arrangement
arranged +
Spike quantity
3;10 +
Spikelet architecture
1-flowered +
Stamen atypical quantity
1 (3) +
Stamen fusion
distinct +
Stamen quantity
1 +  and 3 +
Stem architecture
septate +, hollow +  and solid +
Stem shape
compressed +, terete +  and trigonous +
Stigma quantity
2 +
Stigma relief
papillate +
Style architecture or shape
undivided +
Style arrangement or course or shape
linear +
Style duration
deciduous +
Style shape
2-3(-4)-fid +
Synonyms
Carex onusta +  and Carex plana +
Taxon family
Cyperaceae +
Taxon name
Carex muehlenbergii var. enervis +
Taxon parent
Carex muehlenbergii +
Taxon rank
variety +
Terminal spike reproduction
androgynous +
Testa fusion
free +
Testa width
thin +
Tissue texture
spongy +
Volume
Volume 23 +
Whole organism architecture
rhizomatous +  and short-rhizomatous +
Whole organism duration
perennial +
Whole organism growth form
plant +
Widest leaf-blade relief
papillose +
Widest leaf-blade width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
X chromosome quantity
10 +