Ipomoea campestris 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

35. Ipomoea campestris Meisn. in Martius et al. , Fl. Brasil. 7: 254. 1869. (Meisner 1869: 254)

Ipomoea virgata var. angustata Meisn. in Martius et al. , Fl. Brasil. 7: 241. 1869. (Meisner 1869: 241). Type. BRAZIL. [Minas Gerais], Serra do Cristaës, J.B. Pohl s.n. (?B†, n.v.).

Ipomoea stenophylla Meisn. in Martius et al. , Fl. Brasil. 7: 240. 1869. (Meisner 1869: 240). Type. BRAZIL. Minas Gerais, Curvello, L. Riedel 2758 (lectotype NY00319227, designated here; isolectotype LE).

? Ipomoea stenophylla var. laciniata Meisn. in Martius et al. , Fl. Brasil. 7: 249. 1869. (Meisner 1869: 249). Type. BRAZIL. São Paulo, Rio Pardo, L. Riedel [805] (lectotype LE01025981, designated here)

Type.

BRAZIL. Minas Gerais, Lagoa Santa, E. Warming s.n. (lectotype BR0000005307203, designated here; isolectotypes P, NY).

Description.

Erect or decumbent subshrub with woody xylopodium, stems somewhat woody, pubescent to pilose, eventually glabrescent. Leaves subsessile, ± imbricate, 4-10 × 0.1-1 cm, linear or oblong, acute, mucronate, base broadly cuneate, adaxially thinly pubescent to glabrous, abaxially thinly pubescent, veins somewhat prominent; petioles 1-3 mm, pubescent. Inflorescence of shortly pedunculate cymes from the upper leaf axils, these often reduced to single flowers; peduncles 2-15 mm, pubescent; bracteoles 1-2 mm, triangular, acute, caducous; pedicels 3-9 mm, thickened upwards; sepals subequal, 8-11 × 3-4 mm, oblong-ovate, finely acute, thinly pubescent, inner with scarious margins, pubescent along midrib only, strongly mucronate; corolla 3.5-6 cm long, pink, pubescent, funnel-shaped, limb c. 2 cm diam. Capsules and seeds not seen.

Distribution.

A cerrado species of central Brazil, apparently rare and with few modern collections.

BRAZIL. Dist. Fed.: Rio Belchior, G. Pereira-Silva et al. 7291 (CEN). Goiás: Cocalzinho de Goiás, H.S. Irwin 18770 (NY). Minas Gerais: G. Hatschbach 27787 (MBM, RB), P. Clausen 290 (P); A. Saint-Hilaire B1/1949 (K, P), C1-1060 (P); Lagoa Santa, Palacios et al. 3224 (LIL); Serra de Cipó, H.S. Irwin 20554 (NY); ibid., A. Duarte 2170 (RB); ibid., L.S. Kinoshita & J.C. Galvão 220 (UEC); São Roque da Minas, R. Romero 4956 (HUFU).

Typification.

In designating a lectotype of Ipomoea stenophylla , we have chosen the NY specimen as it appears to have a label in Meisner’s handwriting annotated as " Ipomoea stenophylla nob. (29./12./67.)"

Notes.

This species is distinguished by its linear to oblong, acuminate, mucronate leaves and distinctly acute sepals. The type of Ipomoea stenophylla represents a form with very narrow, linear leaves.

The type of Ipomoea stenophylla var. laciniata is very similar to Hassler 5023a (NY, P) from Río Tapiraguay ( Canindeyú, Paraguay), which was also treated as this variety by Chodat and Hassler (1905: 690), even though plants with 3-lobed leaves were mixed with plants with simple leaves. The specimens have something of the appearance of Ipomoea granulosa because of their short, erect, slightly granular stems and subsessile flowers, but differ in the 3-lobed leaves and pubescent corolla. They are included here with doubt. Unfortunately, we have seen no modern collections, which could help elucidate the status of this variety.