Description from Flora of China Convolvulus repens Vahl; Ipomoea
repens Roth; I. reptans Poiret; I. subdentata Miquel. Herbs
annual, terrestrial and repent or floating; axial parts
glabrous. Stems terete, thick, hollow, rooting at nodes. Petiole
3-14 cm, glabrous; leaf blade variable, ovate, ovate-lanceolate,
oblong, or lanceolate, 3.5-17 X 0.9-8.5 cm, glabrous or rarely
pilose, base cordate, sagittate or hastate, occasionally
truncate, margin entire or undulate, apex acute or acuminate.
Inflorescences 1-3(-5)-flowered; peduncle 1.5-9 cm, base
pubescent; bracts squamiform, 1.5-2 mm. Pedicel 1.5-5 cm. Sepals
subequal, glabrous; outer 2 ovate-oblong, 7-8 mm, margin
whitish, thin, apex obtuse, mucronulate; inner 3 ovate-elliptic,
ca. 8 mm. Corolla white, pink, or lilac, with a darker center,
funnelform, 3.5-5 cm, glabrous. Stamens unequal, included.
Pistil included; ovary conical, glabrous. Stigma 2-lobed.
Capsule ovoid to globose, ca. 1 cm in diam., woody, tardily
dehiscent or ?indehiscent. Seeds densely grayis