Convolvulus bonariensis Cav., Icon. 5: 54, pl. 480(2). 1799. (Cavanilles 1799: 54).

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 87

45. Convolvulus bonariensis Cav., Icon. 5: 54, pl. 480(2). 1799. (Cavanilles 1799: 54).

Aniseia diversifolia Walpers, Nov. Act. Acad, Caes. Leop. Carol. Nat. Cur. 367. 1843. ( Walpers 1843: 367). Type. CHILE, Valparaiso, Meyen s.n. (holotype B?†).

Convolvulus triflorus Phil., Linnaea 33: 183. 1864, nom. illeg., non Convolvulus triflorus Vahl (1794). ( Phillipi 1864: 183). Type. CHILE, Santiago, Philippi s.n. (whereabouts unknown).

Ipomoea cordobana Peter, Nat. Pflanzenfam. [Engler & Prantl] 4(3a): 36. 1891. ( Peter 1891: 36). Type. ARGENTINA, Cordoba, Lorentz 130 (lectotype GOET005724, designated by Staples et al. 2012: 676).

Convolvulus bonariensis var. multiflorus Phil., Anal. Univ. Santiago 90: 222. 1895. ( Phillipi 1895: 222). Type. CHILE, Santiago, Quinta Normal, Phillipi s.n. (SGO, not seen).

Convolvulus dissectus var. diversifolius (Kunze ex Walp.) Reiche, Anal. Univ. Chile 120: 827. 1907. ( Reiche 1907: 827). Type. Based on Aniseia diversifolia Walpers

Type.

ARGENTINA, Pampas de Buenos Aires, Née s.n. (lectotype MA-475568!, sheet with location "pampas de Buenos Ayres" and determination by O’Donell, designated here).

Description.

Finely adpressed-pubescent herb from a thick rootstock, sometimes sericeous on young parts; stems trailing, up to 2 m long, 1-3 mm in diameter. Leaves petiolate, 3-6 (-11) × 1.2-3 (-6) cm, very variable in shape but usually oblong-lanceolate or strap-shaped with pronounced (rarely bifurcate) auricles, occasionally ovate-deltoid, characteristically 5 times as long as broad, apex usually obtuse, mucronate, margin undulate to crenate or serrate, base hastate to cordate; petiole 5-40 mm. Flowers (1-) 2-5 in axillary, pedunculate cymes; peduncles 0.6-4 (-6) cm; bracteoles 2-4 mm, narrowly lanceolate; pedicels 3-12 mm; outer sepals 6-8 × 3-5 mm, elliptic, acute; corolla 1-1.5 cm long, pink, shallowly lobed, midpetaline bands pubescent terminating in teeth; ovary glabrous, style divided 3-6 mm above base; stigmas c. 1.5 mm, narrowly ellipsoid. Capsule glabrous; seeds smooth to indistinctly tuberculate. [ O’Donell 1957: 159-160 (Figure 5); O’Donell 1959: 267-270 (Figure 44)]

Distribution.

Argentina (Hieronymus 916, Grisebach 130, Pedersen 8251); Uruguay (King s.n.); Chile (Gay s.n., Phillipi s.n.). 0-1950 m. Records from Bolivia are errors.

Notes.

The adpressed pubescent, lanceolate to strap-shaped leaves combined with the small corolla are characteristic. Flower size and usually leaf shape serve to distinguish it from Convolvulus chilensis , with which it sometimes grows in Chile. It is morphologically extraordinarily similar to Convolvulus aschersonii from South Africa which differs in its paler, more deeply lobed corollas and usually shorter sepals.