Ipomoea aprica House

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

47. Ipomoea aprica House , Ann. New York Acad. Sci. 18: 243. 1908. (House 1908b: 243)

Ipomoea angustifolia Choisy in A.P. de Candolle , Prodr. 9: 355. 1845. (Choisy 1845: 355), non Ipomoea angustifolia Jacq. (1791) . Type. BRAZIL. J.B. Pohl in Herb. Mart. (holotype M0184918, isotypes BR, K).

Ipomoea angustifolia var. villosula Meisn. in Martius et al. , Fl. Brasil. 7: 249. 1869. (Meisner 1869: 249). Type. BRAZIL. Minas Gerais, near Riego, L. Riedel 1368 (lectotype NY00039151, designated here).

Type.

Based on Ipomoea angustifolia Choisy

Description.

Erect undershrub from a xylopodium to c. 75 cm, stems strigose, woody, not usually branched. Leaves sessile, rather numerous, 1.5-12 × 0.2-0.5 cm, linear to narrowly oblong, base cuneate, apex acute and mucronate, adpressed pubescent. Inflorescence terminal, usually short (c. 5 cm long) with a distinct rhachis, somewhat compact; flowers solitary from the upper leaf axils or in very shortly pedunculate cymes; peduncles 0-5 cm, pubescent; bracteoles c. 2 mm, lanceolate, fugacious; pedicels 3-10 mm, pubescence more spreading than on peduncles; sepals subequal, 4-6 mm (accrescent to 7 mm in fruit), ovate to suborbicular, obtuse to subacute, densely pubescent, the inner c. 1 mm longer than outer, rounded with wide, glabrous, scarious margins; corolla 4-4.5 cm long, funnel-shaped, pink, adpressed pilose, limb 2.5-3 cm diam. Capsules ovoid, 5-7 mm long, glabrous, shortly rostrate; seeds not seen.

Illustration.

Figure 34 .

Distribution.

A characteristic cerrado species, which is quite common in central Brazil but very localised in Paraguay and Bolivia.

PARAGUAY. Amambay: E. Zardini & Baez 52211 (ARIZ); Hahn 1707 (FTG, MO, PY), L. Bernardi 18972 (G); M.S. Ferrucci et al. 1445 (CTES, MBM); Cerro Corá, N. Soria 7386 (CTES, FCQ, MO); ibid., F. Mereles 3440 (FCQ); R. Fortunato et al. 922 (PY). Canindeyú: Reserva Natural, Bosque Mbaracayú, A. Schinini & M. Dematteis 33269 (CTES).

BRAZIL. Dist. Fed.: A.F.M. Glaziou 17710 (K); E.P. Heringer et al. 2982 (NY). Goiás: Caldas Novas, A. Macedo 3532 (NY, S); ibid., N.L. Menezes 643 (SPF, K). Serra dos Cristais, H.S. Irwin et al. 13310 (NY). Mato Grosso: Mun. Rio Brilhante, G. Hatschbach 26117 (RB). Mato Grosso do Sul: Bela Vista, Faz. Novo Recanto, A. Pott 14025 (CGMS). Minas Gerais: P. Clausen, 1840 (BM, K); B.M.T. Walter et al. 5088 (CEN); A.F. Regnell Ser. 3, 196 (S); Serra do Ouro Branco, A.M. Giulietti et al. 13766 (K, USF); Serra da Anta, H.S. Irwin et al. 26036 (NY); Niquelândia, H.S. Irwin et al. 34880 (NY).

BOLIVIA. Santa Cruz: Velasco, P.N. Noel Kempff Mercado, A. Soto et al. 415 (FTG, MO, USZ).

Typification.

We have designated the NY specimen of Riedel 1368 as lectotype of Ipomoea angustifolia var. villosula as a suitable lectotype at LE could not be found.

Note.

This species might be confused with Ipomoea schomburgkii because of its linear-oblong leaves but both the corolla and sepals are hirsute. From I. pinifolia , it is distinguished by the subequal sepals and hirsute corolla and sepals.

Figures

Figure 34. Ipomoea aprica. A habit B abaxial leaf surface C habit D abaxial leaf surface E outer sepal F inner sepal G corolla opened out to show stamens. Drawn by Rosemary Wise A, B from Pohl s. n; C, D from Heringer et al. 2982; E-G from Menezes et al. 4912.