Convolvulus crenatifolius Ruiz & Pav., Fl. Peruv. 2: 10. 1799. (Ruiz and Pavon 1799: 10, tab. 118).

52. Convolvulus crenatifolius Ruiz & Pav., Fl. Peruv. 2: 10. 1799. (Ruiz and Pavon 1799: 10, tab. 118).

Type.

PERU, Huanuco Ruiz & Pavón s.n. s.n. (lectotype MA-814634, designated here; isolectotypes MA 814632, 814633).

Description.

Pubescent to densely hirsute herb; stems twining up to 3 m high. Leaves petiolate, 3-8 × 1-4 cm, ovate-deltoid, strongly auriculate, usually large, apex usually obtuse and mucronate, margin undulate to sinuate, base broadly cordate to hastate with midrib area cuneate onto petiole; petioles 7-15 mm. Flowers (1-) 3-7 in compact axillary, pedunculate umbellate cymes; peduncles 1.5-12 cm; bracteoles 2-5 mm, narrowly lanceolate; pedicels 2-12 mm, apparently accrescent after anthesis; outer sepals 6-6.5 × 3.5-5 cm, elliptic, obtuse or acute; corolla 1.1-1.5 cm long, white to pink, deeply lobed, midpetaline bands brownish, pilose, terminating in a mucro; ovary glabrous; style divided c. 7 mm above base; stigmas 3 mm, more or less included. Capsule glabrous; seeds smooth. [ O’Donell 1959: 271 p. p., Carranza (2008: 4ff.)]

Notes.

We recognise two subspecies, which are distinct through most of their range, but intergrade in parts of northern Argentina ( Morel 5885 from Formosa, Schwarz 6391 from Misiones and Risso 30 from Santiago de Estero are examples) and in the São Paulo area of Brazil ( Hoehne 265), mostly at altitudes of around 1000 m.