Description ³

Plants densely to loosely cespitose; rhizomes black, short to ± elongate in old clumps. Culms 30–100 cm; vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked. Leaves: sheath summits with adaxial hyaline band, truncate to rounded, sometimes prolonged beyond collar; distal ligules to 5 mm; blades 3–5 per fertile culm, 13–40 cm × 2.5–5 mm. Inflorescences densely to usually open, at least proximally, silvery white, 2.5–6 cm × 10–25 mm; proximal internode (4–)8–11 mm; 2d internode 4–8 mm; proximal bracts bristlelike to 5 cm. Spikes 2–4(–5), distant, distinct, ovoid to globose-ovoid, 11–18 × 8–13 mm, base attenuate on terminal spike, rounded on lateral spikes, apex rounded. Pistillate scales white-hyaline with light brown 1–3-veined midstripe, lanceolate to ovate, 4–6 mm, as long as and narrower than perignyia. apex acuminate with subulate tip or awnlike, awn of at least proximate staminate scales and sometimes proximal pistillate scales 0.1–0.9(–2.4) mm, scabrous. Perigynia 15–80 in larger spikes, ascending, white with light green margins, veinless over achene on each face, orbiculate or little wider than long, flat, 5.5–8(–8.7) × 3.5–6.3 mm, 0.4–0.5 mm thick, margin flat, including wing 1–2 mm wide, smooth; beak pale brown to reddish at tip, flat, (1.4–)1.6–2.5(–3.4) mm, ciliate-serrulate, abaxial suture inconspicuous or brown, distance from beak tip to achene 2.5–4 mm. Achenes oblong-elliptic, 2.5–3 × 1.5–2 mm, 0.4–0.5 mm thick. n = 30+III. 2n = 64, 66.

Flowering/fruiting ⁴

Fruiting spring.

Sources and Credits

1. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
2. (c) Smithsonian Institution, National Museum of Natural History, Department of Botany, some rights reserved (CC BY-NC-SA), https://collections.nmnh.si.edu/services/media.php?env=botany&irn=10497206
3. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/4938613
4. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/19889675

More Info

• iNat taxon page
• Biodiversity Heritage Library
• BOLD Systems BIN search
• eFloras.org
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• NatureServe Explorer 2.0
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• World Flora Online

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