Ipomoea lobata (Cerv.) Thell., Viertel

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

319. Ipomoea lobata (Cerv.) Thell., Viertel , Nat. Ges. Zurich 64: 775. 1919. (Thellung 1919: 775)

Mina lobata Cerv. , Nov. Veg. Descrip. 3. 1824. (Cervantes 1824: 3). Type. Cultivated plant from Mexico (holotype G, n.v.).

Quamoclit lobata (Cerv.) House , Bull. Torrey Bot. Club 36: 602. 1909. (House 1909b: 602).

Quamoclit mina G. Don , Gen. Hist. 4: 259, 1838. (Don 1838: 259). Type. Based on Mina lobata Cerv.

Ipomoea mina (G. Don) Voss., Vilm. Blumengaertn. , ed. 3: 710. 1895. (Voss 1894-6: 710)

Ipomoea versicolor Meisn. in Martius et al. , Fl. Brasil. 7: 220. 1869, (Meisner 1869: 220), nom. superfl. Type. Based on Mina lobata Cerv.

Convolvulus mina (G. Don) Kuntze , Revis. Gen. Pl. 3: 215. 1898. (Kuntze 1898: 215).

Type.

Based on Mina lobata Cerv.

Description.

Annual twining herb, stem usually glabrous. Leaves petiolate, 3-12 × 2.5-10, ovate or, more commonly 3-lobed to about half way, base cordate with rounded auricles, apex shortly acuminate, obtuse and mucronate, near glabrous but sometimes puberulent on the veins beneath, abaxially paler; petioles 2-5 cm. Inflorescence of long-pedunculate axillary cymes appearing to form an elongate bifurcate secund raceme; peduncles (5-)10-16(-30)cm; rhachis above branching point, (2-)8-12 cm; bracteoles 1-2 mm, linear-lanceolate, moderately persistent; pedicels slender, 2-6 mm, longer below; sepals dissimilar, glabrous or, occasionally, thinly pilose, outer oblong-ovate, 2-3 × 1.5 mm with terminal awn 2-4 mm long, inner sepals with broader base, elliptic, 3-3.5 × 2 mm and awn 2-4 mm long; corolla tubular, curved, suburceolate,1.8-2.5 cm long, yellow, red or orange, limb formed of 5 small tooth-like lobes; stamens strongly exserted; style exserted. Capsules subglobose, 7 mm diam., glabrous; seeds 4 mm long, pubescent with hairs in patches.

Illustration.

Figure 136B ; Deroin (2001: 161) as Mina lobata .

Distribution.

This species is probably of Mexican origin but is widely cultivated and occasionally naturalised in the Americas. It is perhaps native in deciduous forest in south-central Mexico in and near the state of Guerrero. The following citations mostly represent cultivated plants-it is rarely naturalised.

BRAZIL. Reported from São Paulo, Rio de Janeiro, Minas Gerais and Pará in Flora do Brasil 2020.

BOLIVIA. La Paz: Prov. Nor Yungas, Coroico, pie de Uchumachi, S.G. Beck 29599 (LPB).

PERU. La Libertad: Pacasmayo, H.O. Forbes (BM).

COLOMBIA. Cundinamarca: H. Garcia 10978 (COL).

VENEZUELA. Mérida: L.E. Ruiz-Terán 1115 (MO).

HONDURAS. P.C. Standley 13347 (F).

GUATEMALA. J. Steyermark 52164 (F).

MEXICO. Chiapas: Esquintla, Monte Ovando, T. Croat 47530 (MO). Est. México & Dist. Fed.: Temascaltepec, G.B. Hinton 5070 (K, S); ibid., Ixtapan, ibid., G.B. Hinton 2248 (K); ibid., Platanal, G.B. Hinton 7092 (BM, K); ibid., Ixtapan, G.B. Hinton 2248 (BM, K); Tejupilco, V.W. Steinmann et al. 4136 (IEB). Guerrero: W of Suriana, Y. Mexia 8807 (F, K, MO, S, US); Mun. de Iguala y Buenavista. Cañón de La Mano, entre Los Amates y El Naranjo, C. Catalán et al. 439 (MO); Amatitlán, R. Cruz Duran & M.E. Garcia 459. Michoacán: Tacupa, Huetamo, G.B. Hinton 5631 (BM, K); Zitacuaro, G.B. Hinton 13258 (K); Morelia, G. Arsène 3277 (K, P); Huacana, V.W. Steinmann & E. Carranza 3150 (IEB). Oaxaca: C.L. Smith 900 (MO). Puebla: Father Nicolas s.n. (P). San Luis Potosí: J.G. Schaffner 111 (K), 355 (BM, NY). Veracruz: Orizabi, M. Botteri 954 (K).

UNITED STATES. North Carolina: J.W. Hardin & A. Russell s.n. (NCSC). Utah: M.B. Piep 13087 (UTC).

Note.

Quite unlike other species of Ipomoea except I. gloverae on account of its raceme-like inflorescence combined with aristate sepals and tubular corolla, the limb replaced with five small teeth.

Figures

Figure 136. Photographs of Ipomoea species A I. retropilosa subsp. cundinamarcana B I. lobata C I. quamoclit D I. hederifolia. A Jhon Infante-Betancourt B Alamy Ltd. C Ramona Oviedo D Amed Pupo.