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Trichophorum
See list of 4 species in this genusReference: Crins (2002b).
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1a. Stems terete, smooth
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1b. Stems trigonous, usually scabrous on the angles
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2a. Perianth bristles white, flattened, 3–5 times longer than the inflorescence; spikelets with 9–20 flowers
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2b. Perianth bristles pale brown to brown, terete, much shorter than inflorescence and usually included within the subtending floral scales; spikelets with 3–8 flowers
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3a. Floral scales obtuse at apex, the upper scales with an evanescent midrib; leaves 0.5–0.8 (–1) mm wide, up to as tall as the stems at flowering, much shorter than the stems at fruiting; plants of high-pH river shore ledges
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3b. Floral scales mucronate at apex, all with an excurrent midrib; leaves 0.8–2 mm wide, equal in height or taller than the stems, even at fruiting; plants of dry-mesic to mesic deciduous forests, often with Quercus in the canopy
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Each photo represents one species in this genus.