Juncus albescens - (Lange) Fern.
Northern White Rush
Synonym(s): Juncus triglumis ssp. albescens (Lange) Hult. ;Juncus triglumis var. albescens Lange
Taxonomic Status: Accepted
Related ITIS Name(s): Juncus albescens (Lange) Fern. (TSN 39247)
Unique Identifier: ELEMENT_GLOBAL.2.146973
Element Code: PMJUN01060
Informal Taxonomy: Plants, Vascular - Flowering Plants - Rush Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Juncales Juncaceae Juncus
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Juncus albescens
Taxonomic Comments: FNA (vol. 22, 2000) includes Juncus albescens as a variety of J. triglumis.
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 13May2016
Global Status Last Changed: 13Dec1989
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: NNR
Nation: Canada
National Status: N5 (07Mar2016)

U.S. & Canada State/Province Status
United States Alaska (SNR), Colorado (SNR), Idaho (SNR), Montana (S3), New Mexico (SNR), Oregon (S1), Utah (SNR), Wyoming (S2)
Canada Alberta (S3), British Columbia (S2S3), Labrador (S3S4), Manitoba (SNR), Newfoundland Island (S3), Northwest Territories (SNR), Nunavut (S4), Ontario (S4S5), Quebec (S3S4), Saskatchewan (S1), Yukon Territory (S5)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Alaska to Newfoundland, south to British Columbia, Montana, Utah, and Colorado.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Alaska to Newfoundland, south to British Columbia, Montana, Utah, and Colorado.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AK, CO, ID, MT, NM, OR, UT, WY
Canada AB, BC, LB, MB, NF, NT, NU, ON, QC, SK, YT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MT Flathead (30029), Glacier (30035), Park (30067), Stillwater (30095)
OR Wallowa (41063)
WY Albany (56001), Fremont (56013), Park (56029), Sublette (56035)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
09 St. Marys (09040001)+
10 Upper Yellowstone (10070002)+, Stillwater (10070005)+, Upper Wind (10080001)+, Popo Agie (10080003)+, Greybull (10080009)+, Upper North Platte (10180002)+*, Medicine Bow (10180004)+*, Upper Laramie (10180010)+
14 Upper Green (14040101)+, New Fork (14040102)+
17 Middle Fork Flathead (17010207)+, Wallowa (17060105)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Three-flowered Rush is a small, tufted, grass-like perennial with stems that are 5-15 cm high. The basal leaves are 2-10 cm long, round in cross-section, and divided internally into sections (septate). Stem leaves are lacking. 2-4 flowers are borne in a solitary, terminal cluster that is subtended by 2 brown, papery bracts which are as long as the head. Each flower is subtended by a single scale-like bract and has 6 pale brown perianth segments, or tepals, that are ca. 4 mm long with rounded tips. There are 6 stamens. The brown capsule is 3-5 mm high and is rounded on top with a short beak; it is about as long as the tepals. Each seed is 1-2 mm long with a narrow, papery wing on each end.
Diagnostic Characteristics: Of the small, high alpine rushes, JUNCUS CASTANEUS has larger flowers, and J. BIGLUMIS has only 2 flowers and capsules that are indented on top. In VAR TRIGLUMIS, the bracts are shorter than the flower head, and the mature capsules are 4-7 mm long, exserted beyond the dark brown tepals. JUNCUS is a large and difficult genus to distinguish, so a technical key should be consulted. Mature fruit is necessary for positive determination.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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Element Ecology & Life History Edition Date: 31Oct1994
Element Ecology & Life History Author(s): JM

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
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  • Andersen, M.D. and B. Heidel. 2011. HUC-based species range maps. Prepared by Wyoming Natural Diversity Database for use in the pilot WISDOM application operational from inception to yet-to-be-determined date of update of tool.

  • Brooks, R. E. and S. E. Clemants. 2000. Juncus. Pages 211-255 in Flora of North America Editorial Committee, editor. Flora of North America North of Mexico. Vol. 22 Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford University Press, New York, NY.

  • Brouillet, L., F. Coursol, M. Favreau, M. Anions, P. Bélisle and P. Desmet. 2010+ VASCAN, the Database of Vascular Plants of Canada.

  • Cody, W.J. 1996. The flora of the Yukon Territory. National Research Council of Canada Research Press, Ottawa, Canada. 643 pp.

  • Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, and P. K. Holmgren. 1977. Intermountain Flora; Vascular Plants of the Intermountain West, U.S.A. Volume 6: The Monocotyledons. Columbia University Press, New York, NY.

  • Dorn, R. D. 1977. Manual of the Vascular Plants of Wyoming. 2 volumes. Garland Publishing, Inc., New York, NY.

  • Dorn, R. D. 1988. Vascular Plants of Wyoming. Mountain West Publishing, Cheyenne, WY.

  • Dorn, R. D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY.

  • Evert, E. F. 2010. Vascular Plants of the Greater Yellowstone Area: Annotated Catalog and Atlas. Park Ridge, IL.

  • Fertig, W. 1992. A floristic survey of the west slope of the Wind River Range, Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

  • Fertig, W. 1992. Checklist of the vascular plant flora of the west slope of the Wind River Range and status report on the sensitive plant species of Bridger-Teton National Forest. Unpublished report prepared for the Bridger-Teton National Forest by the Rocky Mountain Herbarium, University of Wyoming, Laramie, WY.

  • Fertig, W. 1998. The status of rare plants on Shoshone National Forest: 1995-97 survey results. Unpublished report prepared for the Shoshone National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. 2000. Rare vascular plant species in the Wyoming portion of the Utah-Wyoming Rocky Mountains Ecoregion. Prepared for the Wyoming Nature Conservancy by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W., R. L. Hartman, and B. E. Nelson. 1991. General floristic survey of the west slope of the Wind River Range, Bridger-Teton National Forest, 1990. Unpublished report prepared for the Bridger-Teton National Forest by the Rocky Mountain Herbarium, University of Wyoming, Laramie, WY.

  • Flora of North America Editorial Committee. 2000. Flora of North America north of Mexico. Vol. 22. Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford Univ. Press, New York. xxiii + 352 pp.

  • Herbarium, Department of Botany, University of Manitoba, Winnipeg, Manitoba, Canada.

  • Herbarium, Museum of Man and Nature, 190 Rupert Avenue, Winnipeg, Manitoba.

  • Hermann, F. J. and W. A. Weber. 1977. Juncus triglumis in North America. Rhodora 79:160-162.

  • Hurd, E. G., S. Goodrich, and N. L. Shaw. 1994. Field Guide to Intermountain Rushes. General Technical Report INT-306. USDA Forest Service Intermountain Region, Ogden, UT.

  • Johnson, P. L. 1962. The occurrence of new arctic-alpine species in the Beartooth Mountains, Wyoming-Montana. Madrońo 16:229-233.

  • Jones, G. P. and W. Fertig. 1999. Ecological evaluation of the potential Arrow Mountain Research Natural Area within the Shoshone National Forest, Fremont County, Wyoming. Unpublished report prepared for the Shoshone National Forest, USDA Forest Service by the Wyoming Natural Diversity Database, Laramie, WY.

  • Kartesz, J. T. 1991. Synonym names from 1991 checklist, as extracted by Larry Morse, TNC, June 1991.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Lesica, P. & J. S. Shelly. 1991. Sensitive, Threatened and Endangered Vascular Plants of Montana. Montana Natural Heritage Program, Occ. Publ. No. 1. Helena, MT.

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