5a. Callirhoe involucrata (Torrey & A. Gray) A. Gray var. involucrata
Purple or low poppy mallow, buffalo rose Purple or low poppy mallow, buffalo rose
Callirhoe involucrata var. novomexicana Baker f.
Stems decumbent, 0.7–7.5 dm. Leaves: stipules 5–15(–23) × (3.5–)5.5–10(–15) mm; blade (1–)2–8.5 × 1.5–9.5 cm, sinuses between lobes of cauline leaves extending to within 5–15 mm of petiole. Involucellar bractlets 6–17.5 × 1.5–3.5 mm. Petals usually reddish purple with white basal spot, rarely white, (1.5–)1.9–3.2 cm (male sterile 0.8–2 cm). Mericarps hairy, hairs simple. 2n = 30, 60.
Flowering spring–early fall. Plains, prairies, waste places, along roads; 200–1500 m; Ariz., Ark., Colo., Ill., Ind., Iowa, Kans., Minn., Mo., Nebr., N.Mex., Okla., Oreg., Pa., Tex., Va., Wyo.
Variety involucrata is introduced in Arizona, central Arkansas, Illinois, Indiana, eastern Iowa, eastern Missouri, Oregon, Pennsylvania, and Virginia.