1. Sabatia angularis (L.) Pursh (rose-pink)

Pl. 421 a–d; Map 1876

Stems (10–)30–80 cm long, nearly square in cross-section and winged, at least in the lower half, the branches mostly opposite. Leaves of stems ovate, widest near the rounded to cordate, clasping bases, 3–7-nerved, 15–40 mm long. Calyces deeply lobed, not or inconspicuously ribbed, 8–20 mm long, the lobes linear or rarely somewhat oblong, 9–18 mm long. Corollas pink to white, with a yellow spot at the base of each lobe, the lobes spathulate to elliptic, 10–22 mm long, 3–5 times as long as the short tube. 2n=38. June–September.

Scattered in the southern half and northeastern quarter of the state (New York to Florida west to Kansas and Texas). Glades, openings of mesic to dry upland forests, banks of streams and rivers, bottomland prairies, moist depressions of upland prairies, and fens; also pastures, old fields, fallow fields, quarries, cemeteries, ditches, railroads, and roadsides.

Uncommonly encountered plants with white corollas have been called f. albiflora Raf. ex House. Steyermark (1963) remarked that the flowers of this species have a pleasant fragrance similar to that of Prenanthes aspera Michx. (Asteraceae).