Ipomoea asplundii 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

166. Ipomoea asplundii O'Donell , Arq. Mus. Paranaense 9: 211. 1952. ( O’Donell 1952: 211)

Type.

BRAZIL. Mato Grosso, Santa Cruz da Barra, banks of Río Paraguay, C.A.M. Lindman 3197 (holotype S07-43711, isotype S09-37459).

Description.

Vigorous twining perennial of unknown height but reaching at least 50 cm, stems pubescent. Leaves petiolate, 2-7 × 1.3-5.5 cm, ovate-cordate (sometimes shallowly 3-lobed or repand), obtuse and strongly mucronate, base subcordate or truncate and briefly cuneate onto the petiole, adaxially green-tomentose with long hairs, abaxially densely silvery-sericeous-tomentose with dense long whitish hairs; petioles 6-22 mm, pubescent, the base often with filiform pseudo-stipules. Inflorescence of lax, axillary, pedunculate cymes, these sometimes paired; peduncles 0.7-8 cm, pubescent; bracteoles 3-11 mm, linear-filiform, pubescent, tardily deciduous; secondary and tertiary peduncles (if present) 7-23 mm; pedicels 0.3-1.2 cm, pubescent; sepals subequal, coriaceous, convex, outer 6-8 × 3-4 mm, elliptic, acute or obtuse, thinly pilose; inner sepals c. 1 mm longer and wider, obovate-elliptic, broader and rounded, glabrous; corolla 4-6 cm long, funnel-shaped, pink, glabrous, limb 2.5-4 cm diam., unlobed. Capsules 7 × 5 mm, ellipsoid, glabrous, slender, persistent style 2-2.5 mm; seeds (immature) oblong, 5 mm, angles long pilose with dirty white hairs.

Illustration.

Figure 97 .

Distribution.

Endemic to Amazonian Brazil, growing in cerrado and on rocks in forest: BRAZIL. Sine loc., W.J. Burchell 858A (K). Mato Grosso: Novo Mundo, P. Est. do Cristalino, G. Henicka et al. 25 (K); Alta Floresta, P. Est. do Cristolino, D. Sasaki et al. 1355 (K); Santa Cruz do Xingu, D.C. Zappi et al. 3062 (K, RB). Tocantins: Mun. Pres. Kennedy, Faz. Primavera, T. Plowman et al. 8128 (FTG, MG); P.N. do Araguaia, Ilha da Bananal, R.C. Mendonça et al. 3951 (IBGE, OXF, US). Pará: Araguaia, 20 km W of Redenção, T. Plowman et al. 8625 (FTG, MG); Marabá, Serra Norte de Carajas, R.S. Secco et al. 442 (MG, MO). Also recorded for Goiás in Flora do Brasil 2020 under construction.

Note.

Rather distinct because of its densely pubescent indumentum with long weakly appressed hairs, persistent linear bracteoles and generally compact inflorescence. The type is atypical in the sense that it has a relatively long, compound inflorescence.

Figures

Figure 97. Ipomoea asplundii. A habit B habit C outer sepal D middle sepal E inner sepal F corolla opened out to show stamens G ovary and style. Drawn by Rosemary Wise A from Plowman et al. 8128; B-G from Secco et al. 442.