Marshallia angustifolia (Michaux) Pursh. Common name: Gulf Coast Barbara's-buttons. Phenology: Late Jun-Sep. Habitat: Pine savannas, seepage bogs. Distribution: E. GA south to c. peninsular FL, west to e. TX; historically disjunct on (likely) the eastern Highland Rim (where mapped here) or Cumberland Plateau of e. TN (Michaux's type came from TN).

Origin/Endemic status: Endemic

Taxonomy Comments: We disagree with Channell's dismissal of the TN record by Michaux as a mislabeling and his identification of the Michaux specimen as representing M. graminifolia of the Atlantic Coastal Plain.

Synonymy ⓘ: = Marshallia graminifolia (Walter) Small — S, misapplied; = Marshallia graminifolia (Walter) Small ssp. tenuifolia (Raf.) L.Watson — Watson & Estes (1990); = Marshallia graminifolia (Walter) Small var. cynanthera (Elliott) Beadle & F.E.Boynton — K4, Beadle & Boynton (1901); = Marshallia tenuifolia Raf. — GW2, SE1, Channell (1957); < Marshallia graminifolia (Walter) Small — Fl7, FNA21, WH3; Persoonia angustifolia Michaux. Basionym: Persoonia angustifolia Michx. 1803

Links to other floras: < Marshallia graminifolia - FNA21

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Wetland Indicator Status:

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

Heliophily ⓘ: 9