Ipomoea pinifolia 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

364. Ipomoea pinifolia Meisn. in Martius et al. , Fl. Brasil. 7: 250. 1869. (Meisner 1869: 250)

Type.

BRAZIL. W.J. Burchell 6700-7 (lectotype BR0000005837731, designated by Wood et al. 2015: 35, isolectotype K!).

Description.

Wiry perennial of cerrado, occasionally leafless, rootstock a xylopodium, stems glabrous, woody, often simple and erect to 1.5 m but sometimes branched and then branches spreading or twining apically. Leaves sessile, very variable in length 2-14 × 0.1-0.3 cm, linear-filiform, acute, glabrous. Inflorescence of 1(-5)-flowered axillary cymes from the upper leaf axils, sometimes clustered apically but more commonly forming a long narrow raceme-like inflorescence up to 30 cm long; peduncles 0-8(-21) mm; bracteoles caducous, scale-like, secondary peduncles (if present) up to 4 mm; pedicels 7-10(-15) mm; sepals coriaceous, convex, very unequal, glabrous, outermost 2-6 mm, elliptic to suborbicular, obtuse to rounded, often minutely mucronate, inner 7-12 mm, oblong to elliptic, obtuse to rounded, margins broad, scarious; corolla 3-4.5 mm long, glabrous, pink, gradually widened from base, the limb 3-3.5 cm diam., undulate, the midpetaline bands ending in teeth. Capsules glabrous; seeds reported to be pilose.

Illustration.

Figure 176 .

Distribution.

A characteristic species of the cerrado, which is locally common in central Brazil extending to a single area in Bolivia.

BRAZIL. Dist. Fed.: J.F. Pastore 307 (CEN); Rio Descoberto, H.S. Irwin 11050 (NY). Goiás: Serra Dourada, B.R. Silva et al. 1172 (F, RB, SPF); Niquelândia, R.D. Reeves 3006 (CEN); Alto Paraíso, C. Proença & M.A. Silva 1177 (UB); ibid., T.B. Cavalcanti et al. 38 (MBM, K, SPF), Minacu, T.B. Cavalcanti 1129 (CEN, RB). Mato Grosso: São José da Serra, G. Hatschbach 32025 (MBM, NY, S); Serra de Ricardo Franco, M.F. Simon 2195 (RB); Buriti, Malme s.n. [8 June 1903] (S); Sangradura, A. Krapovickas et al. 40235 (CTES, CEN); Chapada de Guimaraes, A. Dubs 1201 (K, Z). Mato Grosso do Sul: Rio Verde, Campo Grande-Cuiabá, G. Hatschbach 31952 (K, MBM, NY, RB). Tocantins: Serra das Ararais, G. Gardner 5033 p.p. (BM, K, W); Palmeiropolis, G. Pereira-Silva 13444 (CEN).

BOLIVIA. Santa Cruz: Velasco, P. N. Noel Kempff Mercado, B. Mostacedo et al. 1858 (MO, USZ); S. Jiménez & E. Gutiérrez 1385 (FTG, MO).

Note.

In habit, very unequal sepals and the form of its inflorescence resembling a linear-leaved form of Ipomoea squamisepala but differing additionally in the larger pink corolla and larger inner sepals.

Figures

Figure 176. Ipomoea pinifolia. A inflorescence with leaves B calyx C outer sepals D inner sepals E corolla opened out to show stamens F ovary and style. Drawn by Rosemary Wise from Azevedo et al. 1172.