Ipomoea chodatiana O'Donell

Wood, John R. I., Munoz-Rodriguez, Pablo, Williams, Bethany R. M. & Scotland, Robert W., 2020, A foundation monograph of Ipomoea (Convolvulaceae) in the New World, PhytoKeys 143, pp. 1-823 : 1

23. Ipomoea chodatiana O'Donell , Lilloa 23: 484. 1950. ( O’Donell 1950b: 484)

Ipomoea uruguayensis var. glabrata Chodat & Hassl. , Bull. Herb. Boiss. Ser. 2: 5: 693. 1905. (Chodat and Hassler 1905: 693). Type. PARAGUAY. Canindeyú, Yeruti, E. Hassler 5747 (? holotype G n.v., isotype BM).

Ipomoea uruguayensis forma retusa Chodat & Hassl., Bull. Herb. Boiss. Ser. 2: 5: 693. 1905. (Chodat and Hassler 1905: 693). Type. PARAGUAY. Canindeyú, Ygatimí, E. Hassler 4681 (? holotype G n.v., isotypes BM, F, GH, K, P).

Ipomoea uruguayensis var. sericea Chodat & Hassl. , Bull. Herb. Boiss. Ser. 2: 5: 693. 1905. (Chodat and Hassler 1905: 693). Type. PARAGUAY. Canindeyú, Curuguaty, E. Hassler 4667 (? holotype G n.v. isotypes BM, K, NY).

Ipomoea uruguayensis var. elliptica Chodat & Hassl. , Bull. Herb. Boiss. Ser. 2: 5: 693. 1905. (Chodat and Hassler 1905: 693). Type. PARAGUAY. Canindeyú, Ygatimí, E. Hassler 4667a (? holotype G n.v.).

Ipomoea polymorpha var. discolor Hassl., Fedde , Repert. Spec. Nov. Regni Veg.9: 155. 1911. (Hassler 1911: 155). Type. PARAGUAY. Canindeyú, Yeruti, E. Hassler 5747 (G, BM) and E. Hassler 4681 (G, BM, F, K, NY, P), syntypes.

Ipomoea polymorpha forma canescens Hassl. [as var. discolor forma canescens], Fedde, Repert. Spec. Nov. Regni Veg.9: 155. 1911. (Hassler 1911: 155). Type. PARAGUAY. E. Hassler 5747 (G, BM) and E. Hassler 4681 (G, BM, F, K, P), syntypes.

Ipomoea polymorpha forma argentea Hassl. [as var. discolor forma argentea ], Fedde, Repert. Spec. Nov. Regni Veg.9: 155. 1911. (Hassler 1911: 155). Type. PARAGUAY. E. Hassler 4667 (BM, G, K, NY) and E. Hassler 4667a (G), syntypes.

Ipomoea polymorpha subforma elliptica (Chodat & Hassl.) Hassl. [as var. discolor forma argentea subforma elliptica], Fedde, Repert. Spec. Nov. Regni Veg.9: 155. 1911. (Hassler 1911: 155). Type. Based on Ipomoea uruguayensis var. elliptica Chodat & Hassl.

Ipomoea polymorpha subforma sericea (Chodat & Hassl.) Hassl. [as var. discolor forma argentea subforma sericea ], Fedde, Repert. Spec. Nov. Regni Veg.9: 156. 1911. (Hassler 1911: 156). Type. Based on Ipomoea uruguayensis var. sericea Chodat & Hassl.

Type.

PARAGUAY. Canindeyú, Ygatimí, E. Hassler 4681 (isotypes BM, F, G, GH, K, P).

Description.

Trailing or climbing perennial; stems 1-2 m long, pubescent. Leaves shortly petiolate, 3.5-10 × 1.5-7 cm, ovate, obtuse to retuse, mucronate, base rounded to weakly cordate, adaxially green, pubescent, abaxially white-sericeous with long hairs, the veins prominent and mostly without hairs; petioles 3-23 mm, densely pubescent. Flowers solitary, axillary, pedunculate; peduncles (0.5-)3-8 cm, thinly pubescent; bracteoles 2 mm, lanceolate, pubescent, caducous; pedicels 4-13 mm, densely pubescent; sepals subequal, 9-12 mm, ovate or ovate-elliptic, subacute, mucronate, sericeous, base with a conspicuous gland, inner sepals more densely hairy centrally but margin scarious and nearly glabrous; corolla 6-7 cm long, pink, funnel-shaped, midpetaline bands sericeous; limb 4-4.5 cm diam., somewhat lobed. Capsules and seeds not seen.

Distribution.

Apparently endemic to Canindeyú in eastern Paraguay, where it appears to be very rare:

PARAGUAY. Canindeyú: Col. Ita Poty, I. Basualdo 5609 (FCQ).

Typification.

We have not seen specimens of the type or of the infraspecific taxa at Geneva, so have not made any lectotypification. The Geneva specimens may, in fact, serve as holotypes.

Note.

Resembles Ipomoea nitida but the flowers are solitary and the leaves strongly discolorous and abaxially silvery.