Overview

Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Carex emoryi occurs from Connecticut and New York west to Ontario, Manitoba, North Dakota, and Wyoming south to New Mexico, Chihuahua and Coahuila states in Mexico, Texas, Arkansas, Illinois, Indiana, Ohio, West Virginia, and Virginia (Standley et al. 2002).

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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, Coahuila).
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Physical Description

Morphology

Description

Plants not cespitose. Culms acutely or obtusely angled, 30–115 cm, scabrous. Leaves: basal sheaths red-brown; 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 red-brown, 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.
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Diagnostic Description

Synonym

Carex millegrana T. Holm; C. stricta Lamarck var. elongata (Boeckeler) Gleason; C. stricta var. emoryi (Dewey) L. H. Bailey; C. variabilis L. H. Bailey var. elatior L. H. Bailey; C. virginiana Woods var. elongata Boeckeler
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Type Information

Isotype for Carex millegrana Holm
Catalog Number: US 85954
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): E. J. Wallace
Year Collected: 1896
Locality: Rosebud Creek., South Dakota, United States, North America
  • Isotype: Holm, H. T. 1904. Amer. J. Sci. Arts ser. 4. 17: 311.
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Ecology

Habitat

Stream banks, ditches, seeps; 0–1200m.
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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: > 300

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Life History and Behavior

Cyclicity

Flowering/Fruiting

Fruiting May–Jun.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Carex emoryi

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Carex emoryi

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 11
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

Environmental Specificity: Moderate. Generalist or community with some key requirements scarce.

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Wikipedia

Carex emoryi

Carex emoryi, the riverbank tussock sedge or Emory's sedge, is a plant species native to Canada, the United States, and the States of Chihuahua and Coahuila in northern Mexico. [1][2]

Its natural habitat consists of the banks of rivers and streams. It also occurs on sand and gravel bars in streams. It spreads by means of underground rhizomes. The species is sometimes utilized as a border along retention ponds, for erosion prevention and maintenance reduction along shorelines.[3]

References[edit]

  1. ^ Kew World Checklist of Selected Plant Families
  2. ^ Flora of North America
  3. ^ Tungesvick K., (2009, March). Field Notes: Carex emoryi. American Nurseryman,pg 78
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Notes

Comments

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.
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