3. Mirabilis nyctaginea (Michx.) MacMill. (wild four-o’clock, heart-leaved umbrellawort)

Oxybaphus nyctagineus (Michx.) Sweet

Pl. 459 i; Map 2088

Stems 30–120 cm long, glabrous or sparsely hairy, sometimes slightly glaucous. Leaves (except the uppermost ones) with petioles 1–5 cm long. Leaf blades 3–15 cm long, oblong-ovate to triangular-ovate, broadly rounded to more commonly truncate or cordate at the base, narrowed or abruptly tapered to a bluntly or sharply pointed tip, glabrous or nearly so. Inflorescences terminal. Involucres 5–6 mm long at flowering, becoming enlarged to 10–15 mm long at fruiting, glabrous or sparsely hairy on the surfaces, densely hairy along the margins, with 3–6 flowers. Perianth 8–10 mm long, pink to reddish purple. Fruits (including the hardened perianth tube) 4–6 mm long, densely hairy and roughened or finely warty on the sides and ribs, grayish brown to less commonly nearly black. 2n=58. May–October.

Scattered nearly throughout the state (eastern U.S. and adjacent Canada west to Montana, Colorado, and New Mexico; Mexico). Upland prairies and banks of streams and rivers; also pastures, roadsides, railroads, and disturbed areas.