Calystegia atriplicifolia

Perennials, rhizomatous. Herb­age glabrous. Stems ascending-decumbent, erect, suberect, or trailing, to 10–50 cm or almost absent. Leaves: blade rounded-deltate or triangular-hastate, 20–40(–60) mm wide, base cuneate or lobed, lobes at right angles to midrib or slightly retrorse, apex acute to obtuse. Bracts immediately subtending sepals, elliptic, ovate, or suborbiculate, 8–19 × 3–18 mm, proximally flat or saccate, scarcely to closely enfolding sepals, apex acute, emarginate, obtuse, or rounded. Flowers: sepals 10–15 mm; corolla white, sometimes pink or purple-striped, 31–73 mm.

Distribution

w United States.

Discussion

Subspecies 2 (2 in flora).

Selected References

None.

Lower Taxa

Calystegia atriplicifolia subsp. atriplicifolia, Calystegia atriplicifolia subsp. buttensis

Key

1	Stems usually suberect or trailing, to 35 cm, sometimes almost absent; leaf blades mostly 40–60 mm wide; bracts 14–19 × 9–18 mm, proximally saccate, apex emarginate to rounded; corollas 40–73 mm.	Calystegia atriplicifolia subsp. atriplicifolia
1	Stems ascending-decumbent to erect, 10–50 cm; leaf blades mostly 20–40 mm wide; bracts 8–12 × 3–9 mm, proximally flat, apex acute to obtuse; corollas 31–44 mm.	Calystegia atriplicifolia subsp. buttensis