Ipomoea echinocalyx Meisn. in Martius et al.

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

409. Ipomoea echinocalyx Meisn. in Martius et al. , Fl. Brasil. 7: 223. 1869. (Meisner 1869: 223)

Type.

BRAZIL. Minas Gerais, Lagoa Santa, E. Warming (holotype BR00005307579).

Description.

Twining perennial herb reaching 4 m; stems thinly to densely pubescent. Leaves petiolate, 7-20 × 6-15 cm, ovate, cordate with rounded auricles, shortly acuminate, both surfaces pubescent but abaxially more densely so and paler; petioles 5-18 cm, pubescent. Inflorescence of 1-3-flowered, axillary cymes; peduncles 0-4 mm; bracteoles deltoid, up to 8 mm long; pedicels 15-40 mm, unequal in length, thinly pilose; sepals unequal, outer 15-25 × 3-4 mm, lanceolate or narrowly ovate, acuminate, covered in soft spines, which diminish towards the apex, thinly pilose with white hairs, inner sepals 12-16 mm, lanceolate, terminating in a long mucro, thinly pilose but nearly spineless, margins scarious; corolla c. 7 cm long, funnel-shaped, cream or white, glabrous outside, limb slightly lobed, c. 5 cm diam. Capsules and seeds unknown.

Illustration.

Figure 190F .

Distribution.

Central Brazil and Bolivia, apparently infrequent in both countries.

BRAZIL. Minas Gerais: Viçosa, Y. Mexia 4428 (F, K, MO, NY, S); São Pedro do Suaçuí, G. Davidse et al. 11483 (MO).

BOLIVIA. La Paz: Caranavi-Alto Beni, J.R.I. Wood & T. F. Daniel 18388 (HSB, K, LPB); Sud Yungas, G. Quintana et al. 1124 (LPB). Santa Cruz: Amboró Park, Río San Rafael, I. G. Vargas et al. 2132 (OXF, MO, NY).

Note.

Obviously related to Ipomoea crinicalyx but distinguished by the near absence of peduncles, much longer outer sepals and white or cream flowers. Additionally I. echinocalyx is a much more hirsute plant with fewer flowers in each cyme.

Figures

Figure 190. Photographs of Ipomoea species. A I. tiliifolia B I. rubens C I. corymbosa D I. ochracea E I. peruviana F I. echinocalyx. A http: // tropical. theferns. info / B John Pink C John Wood D Starr Environmental E Maira Martinez F John Wood.