Rudbeckia hirta var. angustifolia
Rhodora 59: 296. 1958.
Annuals, biennials, or perennials. Stems branched mostly at or near mid heights, leafy toward bases. Leaves: basal blades oblanceolate, 0.5–2.5 cm wide; cauline narrowly elliptic (smaller distally); margins entire or serrate; faces hispid to ± sericeous. Peduncles at least 1/2 plant heights. 2n = 38.
Phenology: Flowering spring–summer.
Habitat: Meadows, pastures, old fields, roadsides
Elevation: 20–80 m
Ala., Fla., Ga., La., Miss., S.C., Tex.
Variety angustifolia grows along the Gulf coastal plain.