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33. Ipomoea cardiophylla A. Gray in A. Gray et al., Syn. Fl. N. Amer. 2(1): 213. 1878.
Heart-leaf morning glory
Annuals. Stems twining. Leaf blades cordate, 20–60 × 14–38 mm, base cordate, surfaces glabrous. Peduncles glabrous. Flowers: sepals triangular, 6 × 3–4 mm, chartaceous to coriaceous, apex acute; corolla blue (drying pink or purple), funnelform, 26–27 mm, limb 30–35 mm diam.
Flowering Aug–Oct. Desert scrub; 700–1700 m; Ariz., N.Mex., Tex.; Mexico.
The name Ipomoea aristolochiifolia G. Don has been misapplied to plants of I. cardiophylla.
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