Carex emoryi

Dewey in W. H. Emory

in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 230. 1859.

Illustrated
Synonyms: Carex millegrana T. Holm Carex stricta var. elongata (Boeckeler) Gleason Carex stricta var. emoryi (Dewey) L. H. Bailey Carex variabilis var. elatior L. H. Bailey Carex virginiana var. elongata Boeckeler
Treatment appears in FNA Volume 23. Mentioned on page 395.

Plants not cespitose. Culms acutely or obtusely angled, 30–115 cm, scabrous. Leaves: basal sheaths redbrown; sheaths of proximal leaves glabrous, fronts lacking spots and veins, apex convex, prolonged; blades 3–6 mm wide. Inflorescences: proximal bract equal to inflorescence, 3–5 mm wide. Spikes erect; proximal 3–5 spikes pistillate, 2.5–10 cm × 3–5 mm, base attenuate; terminal 2–3 spikes staminate. Pistillate scales pale or redbrown, equaling perigynia, apex acute, awnless. Perigynia ascending, green, spots absent, 3–5-veined on each face, somewhat flattened, loosely enclosing achenes, ellipsoid, 1.7–3.2 × 1–2.1 mm, dull, apex rounded or obtuse, papillose; beak 0.1–0.3 mm. Achenes not constricted, dull. 2n = 72.


Phenology: Fruiting May–Jun.
Habitat: Stream banks, ditches, seeps
Elevation: 0–1200 m

Distribution

V23 705-distribution-map.jpg

Man., Ont., Ark., Colo., Conn., Del., D.C., Ill., Ind., Iowa, Kans., Md., Mich., Minn., Mo., Nebr., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Pa., S.Dak., Tex., Va., W.Va., Wis., Wyo., Mexico (Chihuahua), Mexico (Coahuila)

Discussion

Carex emoryi resembles C. aquatilis in size and habit, and has similar sheaths and spike dimensions. It is distinguished by the finely veined perigynia, the prolonged convex sheath apex and truncate ligule, and the hypostomic leaves. Most specimens identified as C. aquatilis var. altior are C. aquatilis; the type of C. aquatilis var. altior is an immature specimen of C. emoryi. Although previously thought to be related to C. stricta, the differences in sheath characters and higher chromosome number suggest that C. emoryi is not a member of the C. stricta subgroup.

Selected References

None.

Lower Taxa

None.

"prolonged" is not a number.

... more about "Carex emoryi"
biconvex +
not constricted +
papillose +
Lisa A. Standley +, Jacques Cayouette +  and Leo Bruederle +
Dewey in W. H. Emory +
shortened +
not +  and fibrous +
attenuate +
bidentate +  and emarginate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
m--shaped +  and v--shaped +
3mm;6mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
redbrown +  and brown +
30 cm300 mm <br />0.3 m <br /> (115 cm1,150 mm <br />1.15 m <br />) +
prophyllate +, subsessile +, pedunculate +  and staminate +
Man. +, Ont. +, Ark. +, Colo. +, Conn. +, Del. +, D.C. +, Ill. +, Ind. +, Iowa +, Kans. +, Md. +, Mich. +, Minn. +, Mo. +, Nebr. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Pa. +, S.Dak. +, Tex. +, Va. +, W.Va. +, Wis. +, Wyo. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
0–1200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Stream banks, ditches, seeps +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, sessile +, veinless +  and veined +
Fruiting May–Jun. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
short-sheathing +, sheathless +  and leaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
in W. H. Emory, Rep. U.S. Mex. Bound. +
adventitious +
redbrown +  and pale +
basal +  and proximal +
2-keeled +
ladder-fibrillose +  and veined +
cylindric +
Illustrated +
staminate +  and pistillate +
2.5 cm25 mm <br />0.025 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
ellipsoid +  and flattened +
1mm;2.1mm +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex millegrana +, Carex stricta var. elongata +, Carex stricta var. emoryi +, Carex variabilis var. elatior +  and Carex virginiana var. elongata +
Carex emoryi +
Carex sect. Phacocystis +
species +
, +  and staminate +
plant +  and not cespitose +