Trichophorum pumilum - (Vahl) Schinz & Thellung
Rolland's Leafless-bulrush
Other English Common Names: Rolland's Bulrush
Other Common Names: Rolland's bulrush
Synonym(s): Scirpus pumilus Vahl. ;Trichophorum pumilum var. rollandii (Fern.) Hultén
Taxonomic Status: Accepted
Related ITIS Name(s): Trichophorum pumilum (Vahl) Schinz & Thellung (TSN 507803)
Unique Identifier: ELEMENT_GLOBAL.2.144925
Element Code: PMCYP0Q250
Informal Taxonomy: Plants, Vascular - Flowering Plants - Sedge Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Cyperales Cyperaceae Trichophorum
Check this box to expand all report sections:
Concept Reference
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Concept Reference: Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Concept Reference Code: B99KAR01HQUS
Name Used in Concept Reference: Scirpus pumilus
Taxonomic Comments: As treated here (following Kartesz, 1999), Trichophorum pumilum (=Scirpus pumilus) includes plants from Eurasia (see map in Hulten, Flora of Alaska, 1968) as well as those in North America previously treated as Scirpus rollandii (e.g., by Kartesz 1994). Kartesz (1999) treats the plants under the name Trichophorum pumilum, with 'rollandii' as a synonym.
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 25Aug2016
Global Status Last Changed: 23Oct1997
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Reasons: Occurs in widely scattered sites across most of Canada and in mountainous areas of the western United States (where it is probably a glacial relict). Most documented populations are in British Columbia, where it is considered to be rare, as it is in most or all of its remaining range. These plants are also treated as within the Eurasian Trichophorum pumilum (synonym Scirpus pusillus), or as a New World subspecies or variety of that species.
Nation: United States
National Status: NNR
Nation: Canada
National Status: N4 (29Jun2016)

U.S. & Canada State/Province Status
United States Alaska (S1), California (S1), Colorado (S2), Idaho (S1), Montana (S3), Wyoming (S2)
Canada Alberta (S3), British Columbia (S3S4), Northwest Territories (SNR), Quebec (S2), Saskatchewan (SNR), Yukon Territory (S2)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Circumboreal, reaching southward to Alta., MT, WY, CO, and California (Kartesz 1999).

Other NatureServe Conservation Status Information

Distribution
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Global Range: Circumboreal, reaching southward to Alta., MT, WY, CO, and California (Kartesz 1999).

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

U.S. & Canada State/Province Distribution
United States AK, CA, CO, ID, MT, WY
Canada AB, BC, NT, QC, SK, YT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA Inyo (06027), Mono (06051)
CO Gunnison (08051), Park (08093)
ID Clark (16033), Custer (16037)
MT Glacier (30035), Teton (30099)
WY Albany (56001), Park (56029), Sublette (56035), Teton (56039)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Cut Bank (10030202)+, Teton (10030205)+, Clarks Fork Yellowstone (10070006)+, Upper Laramie (10180010)+, South Platte Headwaters (10190001)+
14 East-Taylor (14020001)+, Upper Green (14040101)+
16 Fish Lake-Soda Spring Valleys (16060010)+
17 Gros Ventre (17040102)+, Greys-Hobock (17040103)+, Birch (17040216)+, Little Lost (17040217)+
18 Crowley Lake (18090102)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A tuft-forming perrenial, up to 1.7 dm tall. Stems are unbranched and leafless, topped with a single slightly pointed spikelet of 3-5 flowers. The whole plant has the general appearance of a green match stick.
General Description: Small Clubrush is a glabrous, grass-like perennial with loosely tufted, slender stems that are 5-12 cm high and arising from slender rhizomes that are clothed in the remains of dead culms and of persistent leaf bases. The leaves have slender blades that are 5-15 mm long above but consist only of sheaths near the base. A solitary globose spikelet, 2-3 mm long, of 3-5 flowers is borne on the stem tip and subtended by a brown, blunt-tipped bract. Each flower consists of a brown scale with thin, white margins subtending 3 stamens and an ovary. The scales fall as the ovaries mature into smooth, blackish achenes that are 1-2 mm long.

From CNHP Wetland Guide 2012: Growth Habit: loosely cespitose, rhizomes long and slender. Culms: grooved, terete, 5-14 cm, smooth.
Leaves: basal sheaths brown, distal leaf sheaths truncate to concave at mouth, blades 2-8.4 x 0.4-0.5 mm, much shorter than culms at flowering.
Spikelets: 3-6 floweerd, bracts shorter than spikelets, apex mucronate
Scales :brown, apex obtuse
Perianth Bristles: absent
Flowers:
Achenes: compressed trigonous to plan-convex, 1.4-1.9 x 0.8-1.2 mm.

Diagnostic Characteristics: After mid-summer, this species looks like a tiny stick with a few little black eggs glued on top. It is most likely confused with species of Eleocharis, but in these species, the base of the style is enlarged, and the scales are persistent. Scirpus cespitosus is a larger plant that forms distinctive tussocks. A hand lens will be necessary for positive identification.

From CNHP Wetland Guide 2012: Main Characteristics:
·Looks similar to spike rush, but no stylopodium and has leaves
·

Habitat Comments: Calcareous ledges, gravels, shores, seepage areas, mires and bogs.
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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NatureServe Conservation Status Factors Edition Date: 26Jun1996
NatureServe Conservation Status Factors Author: W. Fertig/K. Maybury, 6/96; rev. B. MacBryde, 9/2000.

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).

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