Trichophorum planifolium |
Trichophorum |
|||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
bashful bulrush, bashful clubsedge |
bulrush, club-rush, deergrass, trichophore |
|||||||||||||||||||||
Habit | Plants densely cespitose; rhizomes absent. | Herbs, perennial, cespitose, rhizomatous or not. | ||||||||||||||||||||
Culms | trigonous, 10–40 cm, scabrous proximal to inflorescence. |
trigonous or terete. |
||||||||||||||||||||
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 or subbasal; sheaths bladeless or distal sheaths with blade to 5 mm, not fibrous; ligules present; blades obsolete or elongate, linear, less than 1 cm × 1 mm. |
||||||||||||||||||||
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. |
terminal; spikelets 1; involucral bracts 1, suberect, scalelike, apex mucronate or awned. |
||||||||||||||||||||
Spikelets | scales orange-brown to dark brown, midribs excurrent, apex mucronate. |
scales 3–9, spirally arranged, each subtending flower. |
||||||||||||||||||||
Flowers | perianth bristles 3–6, brown, terete, nearly equaling achenes, scabrous; anthers 1–1.5 mm. |
bisexual; perianth of 0–6 bristles, straight, shorter than to about 20 times as long as achene, smooth or scabrous; stamens 3; styles linear, 3-fid, base persistent. |
||||||||||||||||||||
Achenes | compressed trigonous, 1.5–2 × 0.7–1.1 mm. |
trigonous or plano-convex. |
||||||||||||||||||||
Trichophorum planifolium |
Trichophorum |
|||||||||||||||||||||
Phenology | Fruiting summer (Jun–Jul). | |||||||||||||||||||||
Habitat | Mesic to dry hardwood forests, usually with oak component, often on hillsides | |||||||||||||||||||||
Elevation | 50–900 m (200–3000 ft) | |||||||||||||||||||||
Distribution |
CT; DC; DE; IL; MA; MD; MO; NJ; NY; OH; PA; RI; VA; VT; WV; ON
|
North America; Circumpolar to circumboreal; Andean and tropical Southeast Asian mountains |
||||||||||||||||||||
Discussion | Species 9 (6 in the flora). The appropriate name and typification for this genus have been debated widely. Arguments for conservation of Trichophorum Persoon in the sense used here, with the conserved type, T. alpinum (Linnaeus) Persoon, were presented (M. Salmenkallio and I. Kukkonen 1989), and the proposal was accepted in the Code. The proposal to segregate T. alpinum from the rest of Trichophorum, in the genus Eriophorella (J. Holub 1984), is based on characters that do not justify generic rank. In fact, K. Tan (1985) found that T. pumilum (Vahl) Schinz & Thellung could not be considered generically distinct from T. alpinum and created a combination for it within Eriophorella. The name Baeothryon Ehrhart ex A. Dietrich, previously considered to be a synonym of Trichophorum, has been shown to apply to a section of Eleocharis R. Brown (M. Salmenkallio and I. Kukkonen 1989; M. S. González-Elizondo and P. M. Peterson 1997). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||||||||||||||||||
Key |
|
|||||||||||||||||||||
Source | FNA vol. 23, p. 31. | FNA vol. 23, p. 28. | ||||||||||||||||||||
Parent taxa | Cyperaceae > Trichophorum | Cyperaceae | ||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||
Synonyms | Isolepis planifolia, Baeothryon planifolium, Baeothryon verecundum, Eleocharis planifolia, Scirpus planifolius, Scirpus verecundus | Eriophorella | ||||||||||||||||||||
Name authority | (Sprengel) Palla: Oesterr. Bot. Z. 63: 402. (1913) | Persoon: Syn. Pl. 1: 69. (1805) | ||||||||||||||||||||
Web links |
|