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bashful bulrush, bashful clubsedge

alpine bulrush, alpine clubsedge, Hudson bay clubrush, silken clubrush

Habit Plants densely cespitose; rhizomes absent. Plants densely cespitose; rhizomes arching, short.
Culms

trigonous, 10–40 cm, scabrous proximal to inflorescence.

trigonous, 10–40 cm, scabrous proximal to inflorescence.

Leaves

basal sheaths brown;

distal leaf sheaths concave at mouth;

blades 10–400 × 0.8–2 mm, equaling or exceeding culms at flowering and fruiting.

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 3–8-flowered, 4.1–5.2 × 1.5–2.1 mm;

bracts equaling spikelets, 3.7–6 mm, apex awned, awn to 3 mm.

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 orange-brown to dark brown, midribs excurrent, apex mucronate.

scales yellow-brown, apex obtuse.

Flowers

perianth bristles 3–6, brown, terete, nearly equaling achenes, scabrous;

anthers 1–1.5 mm.

perianth bristles 6, white, flattened, exceeding achenes by as much as 20 times, smooth;

anthers 1.1–1.6 mm.

Achenes

compressed trigonous, 1.5–2 × 0.7–1.1 mm.

plano-convex, 1.2–1.6 × 0.5–0.8 mm.

2n

= 58.

Trichophorum planifolium

Trichophorum alpinum

Phenology Fruiting summer (Jun–Jul). Fruiting summer (Jun–Aug).
Habitat Mesic to dry hardwood forests, usually with oak component, often on hillsides Open or shaded, wet, peaty or gravelly fens, bogs, sheltered banks of lakes, ponds, and streams, tending to occur on lime-rich substrates
Elevation 50–900 m [200–3000 ft] 0–1400 m [0–4600 ft]
Distribution
from FNA
CT; DC; DE; IL; MA; MD; MO; NJ; NY; OH; PA; RI; VA; VT; WV; ON
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CT; MA; ME; MI; MN; MT; NH; NJ; NY; VT; WI; AB; BC; MB; NB; NL; NS; NT; NU; ON; QC; SK; YT; Europe; c Asia (Kamchatka)
[WildflowerSearch map]
[BONAP county map]
Parent taxa Cyperaceae > Trichophorum Cyperaceae > Trichophorum
Sibling taxa
T. alpinum, T. cespitosum, T. clementis, T. clintonii, T. pumilum
T. cespitosum, T. clementis, T. clintonii, T. planifolium, T. pumilum
Synonyms Isolepis planifolia, Baeothryon planifolium, Baeothryon verecundum, Eleocharis planifolia, Scirpus planifolius, Scirpus verecundus Eriophorum alpinum, Eriophorum hudsonianum, Scirpus alpinus, Scirpus hudsonianus, T. alpinum var. hudsonianum
Name authority (Sprengel) Palla: Oesterr. Bot. Z. 63: 402. (1913) (Linnaeus) Persoon: Syn. Pl. 1: 70. (1805)
Source Flora of North America vol. 23, p. 31. Flora of North America vol. 23, p. 31.
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