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FNA | Family List | FNA Vol. 14 | Convolvulaceae | Calystegia

9. Calystegia pubescens Lindley, J. Hort. Soc. London. 1: 70, fig. [p. 71]. 1846.
[I W]

Perennials. Herbage sparsely hairy or glabrous. Stems trailing to twining-climbing, to 100 cm. Leaves: blade oblong-hastate to narrowly triangular, to 60+ mm, margins ± parallel at mid blade, base lobed, lobes abruptly spreading, ± triangular, apex acute to obtuse. Bracts immedi­ately subtending sepals, lance-ovate, 15–21(–24) × 8–14 mm. Flowers: sepals 8–12+ mm; corolla usually pink, sometimes red or white, 40–67 mm, horticultural doubles, limb multilobed; margins entire; stamens and ovaries absent. 2n = 22.

Flowering Jun–Sep. Abandoned plantings, disturbed sites; introduced; Ont., Que.; Conn., Del., D.C., Ill., Kans., Maine, Mass., Mich., Mo., N.H., N.J., N.Y., Pa., Tenn., Vt.; Asia; introduced also in Europe.

The nomenclatural type of Calystegia pubescens may prove to be conspecific with the type of Convolvulus japonicus Thunberg. Plants are sterile; reproduction is by rhizomes.


 

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