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Chasmanthium sessiliflorum (Poiret) Yates var. sessiliflorum. Common name: Longleaf Spikegrass. Phenology: Aug-Oct. Habitat: Moist to dryish hardwood forests, swamps, other moist habitats. Distribution: Se. VA, n. TN, n. AR, and e. OK south to sc. peninsular FL and ec. TX.

Origin/Endemic status: Endemic

Taxonomy Comments: This species and C. laxum are morphologically somewhat similar, but their treatment as infrataxa of a single species is completely unwarranted. They frequently co-occur (especially on the Gulf Coastal Plain), growing side by side, and show no sign of intergradation.

Synonymy ⓘ: < Chasmanthium laxum (L.) Yates ssp. sessiliflorum (Poir.) L.G.Clark — Mo1; < Chasmanthium laxum (L.) Yates var. sessiliflorum (Poir.) L.G.Clark — NcTx, WH3, Wipff & Jones (1994); < Chasmanthium sessiliflorum (Poir.) Yates — Ar, C, FlGr, FNA25, GW1, K4, NS, POWO, Tn, Tx, Va, W, Yates (1966a), Yates (1966c); < Uniola longifolia Scribn. — S, S13; < Uniola sessiliflora Poir. — F, G, HC, RAB. Basionym: Uniola sessiliflora Poir. 1808

Links to other floras: < Chasmanthium sessiliflorum - FNA25

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FAC (name change)
  • Great Plains: FAC (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 4

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Armin Weise | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Armin Weise | Original Image ⭷
image of plant© Armin Weise | Original Image ⭷

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Horticultural Information

No horticultural data found for this taxon.