Trichophorum alpinum — Details

Trichophorum alpinum (L.) Pers.:
Japan (Asia)
North Korea (Asia)
Russian Federation (Asia)
China (Asia)

Flora of China Editorial Committee. 2010. Fl. China 23: 1–515. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis. http://www.tropicos.org/Reference/100001734

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Scirpus hudsonianus (Michx.) Fernald:
Canada (North America)
United States (North America)

Fernald, M. 1950. Manual (ed. 8) i–lxiv, 1–1632. American Book Co., New York. http://www.tropicos.org/Reference/1327
Voss, E. G. 1972. Gymnosperms and Monocots. i–xv, 1–488. In Michigan Fl. Cranbrook Institute of Science, Bloomfield Hills, Michigan. http://www.tropicos.org/Reference/1494
Gleason, H. A. & A. Cronquist. 1968. The Pteridophytoa, Gymnospermae and Monocotyledoneae. 1: 1–482. In H. A. Gleason Ill. Fl. N. U.S. (ed. 3). New York Botanical Garden, New York. http://www.tropicos.org/Reference/1495

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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: Circumboreal, extending south to Conn., Mich., Sask., nw Montana, and southern British Columbia, barely reaching the range at the head of the Kootenai Drainage (Trout Lake) in B.C.

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Physical Description

Morphology

Description

Plants densely cespitose; rhizomes arching, short. Culms trigonous, 10–40 cm, scabrous proximal to inflorescence. Leaves: basal sheaths gray-brown; distal leaf sheaths concave at mouth; blades 6–9 × 0.4–0.5 mm, much shorter than culms at flowering and fruiting. Inflorescences: spikelets 15–20-flowered, 5.4–8 × 2.2–3.5 mm; bracts equaling or shorter than spikelets, 4.5–7.8 mm, apex mucronate or awned, awn to 3 mm. Spikelets: scales yellow-brown, apex obtuse. Flowers: perianth bristles 6, white, flattened, exceeding achenes by as much as 20 times, smooth; anthers 1.1–1.6 mm. Achenes plano-convex, 1.2–1.6 × 0.5–0.8 mm. 2n = 58.

Flora of North America @ eFloras.org

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Diagnostic Description

The solitary spikelet and tuft of long bristles make this species resemble a slender Eriophorum; however, species of true cottongrass have at least 10 bristles per achene.

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Synonym

Eriophorum alpinum Linnaeus, Sp. Pl. 1: 53. 1753; E. hudsonianum Michaux; Scirpus alpinus (Linnaeus) Dalla Torre & Sarntheim 1906, not Schleicher ex Gaudin 1828; S. hudsonianus (Michaux) Fernald; Trichophorum alpinum var. hudsonianum (Michaux) Persoon

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Ecology

Habitat

Comments: Sphagnum bogs and other very wet places.

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Habitat & Distribution

Fruiting summer (Jun–Aug). Open or shaded, wet, peaty or gravelly fens, bogs, sheltered banks of lakes, ponds, and streams, tending to occur on lime-rich substrates; 0–1400 m; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut; Ont., Que., Sask., Yukon; Alaska, Conn., Maine, Mass., Mich., Minn., Mont., N.H., N.J., N.Y., Vt., Wis.; Europe; c Asia (Kamchatka).

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Associations

Foodplant / feeds on
adult of Plateumaris discolor feeds on pollen? of Trichophorum alpinum
Remarks: season: (3-)6(-12)

Source: BioImages - the Virtual Fieldguide (UK)

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Trichophorum alpinum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Species: 3
Species With Barcodes: 1

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Source: Barcode of Life Data Systems (BOLD)

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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Trichophorum alpinum

Trichophorum alpinum is a species of flowering plant in the sedge family known by the common name alpine bulrush. It has a circumboreal distribution, occurring throughout the northern latitudes of the Northern Hemisphere. It is present in Europe, Asia, and northern North America.^[1]

This sedge produces stems up to 40 centimeters tall from a short rhizome. The leaves are no more than a centimeter long. The flowers have cottony white bristles that may extend 2 centimeters past the spikelet.^[1]^[2]

This plant grows in bogs and calcareous mountain meadows.^[1]

References

^ ^a ^b ^c Williams, Tara Y. 1990. Trichophorum alpinum. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.
^ Trichophorum alpinum. Flora of North America.

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