Schwalbea americana Linnaeus. Common name: Chaffseed. Phenology: (Late Apr-) May-Jun; Aug. Habitat: Pine savannas, sandhill-pocosin ecotones (in the uphill portions), mesic loamy-soil slopes or swales in longleaf pine and hills, fire-maintained interior woodlands and barrens. Distribution: Formerly rather widespread in e. North America, primarily in the Coastal Plain, from e. MA, south to c. peninsular FL and west to TX, and disjunct in the Cumberland Mountains of KY and TN. The species is now limited to a few scattered sites in MA, NJ, NC, SC, GA, FL, AL, and LA, a small portion of its former distribution. It appears to require high fire frequency, especially during the growing season, perhaps related to its establishment ecology.

Origin/Endemic status: Native

Taxonomy Comments: Ward (2012a) defended the recognition of two varieties, albeit without much detail or discussion.

Other Comments: The tiny seeds are hyaline-winged.

Synonymy ⓘ: = C, F, Fl7, FNA17, G, GW2, NE, NY, RAB, Tat, Tn, Tx, Va, WH3; > Schwalbea americana L. — Pennell (1935); > Schwalbea americana L. var. americana — K4, Ward (2012a); > Schwalbea americana L. var. australis (Pennell) Reveal & C.R.Broome — K4, Ward (2012a); > Schwalbea australis Pennell — S, Pennell (1935); Schwalbea americana L. Basionym: Schwalbea americana L. 1753

Links to other floras: = Schwalbea americana - FNA17

Show in key(s)

Show parent genus | Show parent in key(s)

Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC
• Eastern Mountains and Piedmont: FACU
• Northcentral & Northeast: FACU

Heliophily ⓘ: 9