Ipomoea suffulta (Kunth) G. Don

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

337. Ipomoea suffulta (Kunth) G. Don , Gen. Hist. 4: 276. 1838. (Don 1838: 276)

Convolvulus suffultus Kunth , Nov. Gen. Sp. 3: 102. 1818 [pub. 1819]. (Kunth 1819: 102). Type. MEXICO. Michoacán, Vulcan de Jorullo, Humboldt & Bonpland s.n. (holotype P00670752).

Type.

Based on Convolvulus suffultus Kunth

Description.

Procumbent perennial herb with woody rootstock, stems glabrous or hispid-hirsute, up to 4 m long. Leaves petiolate, 1-6 × 1-5 cm, suborbicular to reniform, shortly acuminate, mucronate, margin entire to slightly dentate, glabrous to thinly hispid-pilose; petiole 0.5-1.6(-5.8) cm. Flowers usually solitary, bracteate, the fertile leaves (bracts) folded so forming a spathe around the flower; peduncle not differentiated from the petiole; bracteoles 1 mm, ovate to suborbicular, mucronulate, apparently persistent; pedicels 2-3 mm; sepals somewhat unequal, glabrous to thinly pubescent, outer 3 × 1.25-1.5 mm, lanceolate, obtuse, minutely mucronate, inner 4-5 × 1.5 mm, oblong-lanceolate, obtuse, margins scarious; corolla 4.5-6 cm long, gradually widened (flared) from a short narrowly cylindrical basal tube, reddish-purple, pink or white, glabrous, limb 3.5-4 cm wide. Capsules subglobose, 8-10 mm, glabrous, enclosed by bracts; seeds 6-7 mm long, rounded, blackish, puberulent.

Illustration.

Figure 10H ; McDonald JA (1987c: 84).

Distribution.

Rock outcrops in open deciduous oak or pine forest, mostly between 1000 and 1700 m in central Mexico south to Guatemala.

G UATEMALA. J. Steyermark 51602 (US).

M EXICO. Chiapas: Valley of Jiguipilas, E.W. Nelson 2920 (GH, K, US); Ocozocoautla de Espinosa, D.E. Breedlove 27543 (MO); Tzimol, A. Reyes Garcia & G. Urquijo 825 (BM, MEXU). Est. México & Dist. Fed.: Temascaltepec, Ixtapan, G.B. Hinton 1631(BM, K, MEXU); Tejupilco, G.B. Hinton 1606 (BM, K); Tejupilco, H. Vibrans 5449 (MEXU). Guerrero: Mina, G.B. Hinton 9271 (GH, K, MO); Montes de Oca, G.B. Hinton 11363 (K); Cajeles, H. Kruse 1975 (IEB). Jalisco: Tecalitlán, E. Carranza al. 6793 (IEB, MO); Tuxpan, C.R. Barnes & W. Land 323(K). Michoacán: Zitacuaro, G.B. Hinton 13188 (K, MO); Cerro Cobrero, V.W. Steinmann 5453 (ARIZ, IEB); Carácuaro, E. Carranza & P. Carrillo 6388 (IEB). Nayarit: Ixtlán to Cerro Juanacata, Y. Mexia 869 (MO), 896 (BM); Ahuacatlan, O. Téllez 9313 (MEXU). Oaxaca: C.G. Pringle 4755 (BM, E, K, MO, P, S); Santo Domingo Tonalá, A. Torres Hernández 191 (IEB); San Juan Mixtepec, E. Hunn 1854 (MEXU).

Note.

Very distinct because of the leaf-like bracts folded to form a spathe around the very small calyx and small subglobose Capsules and the suppression of the peduncle by fusion with the petiole. The flared funnel-shaped corolla is also distinct.

Figures

Figure 10. Pollen of Ipomoea species. A I. triloba (D'Arcy 317) B I. cryptica (Steinbach 6311) C I. purpurea (Parada & Rojas 2664) D I. alba (Wood et al. 27828) E I. dumosa (Hinton et al. 9479) F I. hederifolia (Queiroz 15975) G I. stans (Y. Mexia 275112) H I. suffulta (Pringle 4755). Photos by Robert Scotland.