Trichophorum planifolium |
Trichophorum cespitosum |
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bashful bulrush, bashful clubsedge |
trichophore cespiteux, tuft bulrush, tuft clubrush, tuft clubsedge |
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Habit | Plants densely cespitose; rhizomes absent. | Plants densely cespitose; rhizomes absent. |
Culms | trigonous, 10–40 cm, scabrous proximal to inflorescence. |
grooved, terete, 5–45 cm, smooth. |
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 brown; distal leaf sheaths concave at mouth; blades 1.5–8 × 0.3–0.4 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 3–9-flowered, 3.3–7 × 1.2–3 mm; bracts equaling spikelets, 3.3–4.5 mm, apex with awn less than 1 mm. |
Spikelets | scales orange-brown to dark brown, midribs excurrent, apex mucronate. |
scales reddish brown to dark brown, apex mucronate to acute. |
Flowers | perianth bristles 3–6, brown, terete, nearly equaling achenes, scabrous; anthers 1–1.5 mm. |
perianth bristles 6, brown, terete, equaling or exceeding achenes, smooth to scabrous; anthers 1.5–2.6 mm. |
Achenes | compressed trigonous, 1.5–2 × 0.7–1.1 mm. |
compressed trigonous, 1.4–1.7 × 0.6–0.9 mm. |
2n | = 104. |
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Trichophorum planifolium |
Trichophorum cespitosum |
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Phenology | Fruiting summer (Jun–Jul). | Fruiting summer (May–Aug). |
Habitat | Mesic to dry hardwood forests, usually with oak component, often on hillsides | Open, wet, rocky or peaty meadows, fens, bogs, shores |
Elevation | 50–900 m (200–3000 ft) | 0–2100 m (0–6900 ft) |
Distribution |
CT; DC; DE; IL; MA; MD; MO; NJ; NY; OH; PA; RI; VA; VT; WV; ON
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AK; ID; ME; MT; NC; NH; NY; OR; SC; TN; UT; VT; WA; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; montane c Asia; Greenland; Europe; boreal w Asia
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Discussion | Segregates defined on the basis of characters such as the number of flowers per spike and distal leaf sheath morphology have been recognized at varietal or subspecific ranks in North America and Europe. In North America, at least, these characters are variable within populations and appear to have no geographic integrity. North American plants of Trichophorum cespitosum appear to be identical to subsp. cespitosum (cf. R. A. DeFilipps 1980). No cytological differences have been detected between European and North American populations; all counted plants have 2n = 104 or n = 52. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 23, p. 31. | FNA vol. 23, p. 29. |
Parent taxa | Cyperaceae > Trichophorum | Cyperaceae > Trichophorum |
Sibling taxa | ||
Synonyms | Isolepis planifolia, Baeothryon planifolium, Baeothryon verecundum, Eleocharis planifolia, Scirpus planifolius, Scirpus verecundus | Scirpus cespitosus, Baeothryon cespitosum, Scirpus bracteatus, Scirpus cespitosus var. callosus, Scirpus cespitosus var. delicatulus |
Name authority | (Sprengel) Palla: Oesterr. Bot. Z. 63: 402. (1913) | (Linnaeus) Schur: Verh. Mitth. Siebenbürg. Vereins Naturwiss. Hermannstadt 4: 78. (1853) |
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