Overview

Distribution

National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Herbs, perennial, tufted, 2--6 dm. Rhizomes densely branching. Culms 1--10. Cataphylls 1--3. Leaves basal, 1--2(--3); auricles whitish or purplish tinged, 0.2--0.4(--0.6) mm, scarious; blade flat, 5--15 cm x 0.5--1.1 mm, margins entire. Inflorescences usually somewhat compact, 1.5--7 cm; primary bract usually shorter than inflorescence. Flowers: bracteoles 2; tepals greenish, lanceolate, 3.3--4.4 mm, apex acuminate; stamens 6, filaments 0.5--0.9 mm, anthers 0.4--0.6 mm; style 0.1--0.2 mm. Capsules light tan or darker, 1-locular to pseudo-3-locular, ellipsoid to nearly globose, (3.3--)3.8--4.7 mm, nearly equal to or longer than tepals. Seeds tan, ellipsoid to lunate, 0.436--0.73 mm, not tailed. 2n = 80.
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Diagnostic Description

Synonym

Juncus arizonicus Wiegand; J. interior var. arizonicus (Wiegand) F. J. Hermann; J. interior var. neomexicanus (Wiegand) F. J. Hermann; J. monostichus Bartlett; J. neomexicanus Wiegand
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Type Information

Holotype for Juncus neomexicanus Wiegand
Catalog Number: US 26829
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. Palmer
Year Collected: 1890
Locality: Huachuca., Arizona, United States, North America
  • Holotype: Wiegand, K. M. 1903. Bull. Torrey Bot. Club. 30: 447.
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Ecology

Habitat

Habitat & Distribution

Flowering and fruiting late spring--early summer. Dry, often upland sites in prairies, exposed disturbed sites, and ditches in sandy or clayey soils; Alta., Man., Ont., Que., Sask.; Ariz., Ark., Colo., Ill., Ind., Iowa, Kans., Ky., La., Minn., Mont., Mo., Nebr., N.Mex., N.Dak., Ohio, Okla., S.Dak., Tenn., Tex.as, Utah, Wis., Wyo.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Juncus interior

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

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: TNR - Not Yet Ranked

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: T4 - Apparently Secure

Reasons: Juncus interior var arizonicus occurs from south-central Arizona to northern Mexico in Sonora.

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National NatureServe Conservation Status

United States

Rounded National Status Rank: N3 - Vulnerable

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NatureServe Conservation Status

Rounded Global Status Rank: T3 - Vulnerable

Reasons: Juncus interior var arizonicus occurs in south-central Arizona and southern Sonora, Mexico, where its distribution and abundance is unknown.

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Wikipedia

Juncus interior

Juncus interior is a species of rush. It is known by the common name Interior Rush, and in its native range also as "Soft Rush" (which generally refers to J. effusus outside North America).

It is native to the central inlands of North America where it grows in moist areas such as meadows and spring prairies. It can also be found in drier areas.

This is a perennial herb with tufted roots. It has long, flat, narrow leaves with rounded auricles. The flowers are located along the ascending branchlets. They are green with very narrow, pointed sepals and petals and six stamens. The fruits are pale brown capsules which are eaten by waterfowl.

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Names and Taxonomy

Taxonomy

Comments: Not accepted as distinct in FNA (2000, vol. 22).

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Comments: Juncus interior var. arizonicus and var. neomexicanus are not recognized as distinct from the typical J. interior by FNA (2000, vol. 22).

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Comments: Not accepted as distinct in FNA (2000, vol. 22).

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Comments: Kartesz (1999) accepted three varieties of Juncus interior (var. interior, var. arizonicus, and var. neomexicanus) which are not recognized as distinct in FNA (2000, vol. 22) or Jepson (2012).

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