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Trichophorum alpinum Pers.

Alpine bulrush (en), Scirpe de Hudson (fr), Trichophore des Alpes (fr), Linaigrette des Alpes (fr), Scirpe des Alpes (fr)

Species

Angiosperms > Poales > Cyperaceae > Trichophorum

Characteristics

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.
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Rhizomes creeping, branched. Culms densely tufted, 20-30 cm tall, 3-angled, slightly scabrous, clothed at base with bladeless leaf sheaths. Leaf blade of apical leaf ca. 1 cm × 0.3 mm. Involucral bracts glumelike, basalmost awned. Inflorescences reduced to a single terminal spikelet, oblong, 4.5-5 × ca. 3 mm, few flowered. Glumes yellowish brown, oblong to narrowly ovate, ca. 3.5 × 0.9 mm, 1-veined, apex obtuse. Perianth bristles 4-6, white, to 2 cm in fruit, flattened, smooth, silky, eventually ± crinkled. Stigmas 3. Nutlet dark brown, oblong-obovoid, 1-1.5 mm, apex shortly pointed. Fl. and fr. Jun-Aug.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality
Pollination anemogamy
Spread anemochory
Mature width (meter) -
Mature height (meter) 0.1 - 0.25
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Flower

Trichophorum alpinum flower picture by franco (cc-by-sa)
Trichophorum alpinum flower picture by cornelia bischoff (cc-by-sa)
Trichophorum alpinum flower picture by cornelia bischoff (cc-by-sa)

Fruit

Trichophorum alpinum fruit picture by hilde decuypere hilde decuypere (cc-by-sa)

Distribution

Trichophorum alpinum world distribution map, present in Austria, Belarus, Canada, Switzerland, China, Czech Republic, Germany, Denmark, Spain, Finland, France, Micronesia (Federated States of), Hungary, Italy, Japan, Malaysia, Norway, Poland, Korea (Democratic People's Republic of), Romania, Sweden, and United States of America

Conservation status

Trichophorum alpinum threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:315459-1
WFO ID wfo-0000591713
COL ID 58GZM
BDTFX ID 68930
INPN ID 127191
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Baeothryon alpinum Baeothryon hudsonianum Eriophorella alpina Limnochloa alpina Linagrostis alpina Trichophorum alpinum Trichophorum hudsonianum Eriophorum alpinum Eriophorum hudsonianum Leucocoma alpina Scirpus trichophorum Scirpus hudsonianus Eleocharis alpina Scirpus alpinus Trichophorum husonianum Plumaria alpina Trichophorum alpinum var. hudsonianum
WorldFloraDB 2024