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, K1, K3, K4, Tn, Tx, Va, W, Yates (1966a), Yates (1966c); < Uniola longifolia Scribn. – S, S13; < Uniola sessiliflora Poir. – F, G, HC, RAB
Links to other floras: < Chasmanthium sessiliflorum - FNA25
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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Horticultural Information
No horticultural data found for this taxon.