Ipomoea wolcottiana Rose

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

119. Ipomoea wolcottiana Rose , Gard. & Forest 7: 367. 1894. (Rose 1894: 367)

Ipomoea calva House , Bot. Gaz. 43: 410. 1907. (House 1907b: 410). Type. MEXICO. Guerrero, La Junta, E.W. Nelson 6992 (holotype US00111373).

Ipomoea calodendron O'Donell , Lilloa 23: 480. 1950. ( O’Donell 1950b: 480). Type. PERU. [Piura], valley of Río Quiros, Weberbauer 6396 (holotype US00111371, isotype F, NY).

Ipomoea wolcottiana subsp. calodendron ( O'Donell) McPherson , Ann. Missouri Bot. Gard. 68 (4): 544. 1981. (McPherson 1981: 544).

Type.

MEXICO. Colima, Manzanillo, E. Palmer 1342 (holotype US00111492, isotypes BM, GH, K, NY).

Description.

Tree to 13 m, the trunk up to 30 cm wide and with milky sap, stems shortly puberulent or glabrous. Leaves petiolate, 4-15 × 2.3-9 cm, ovate, acuminate, very shortly mucronate, shallowly cordate to truncate at base, adaxially thinly pubescent to glabrous, abaxially pubescent to obscurely puberulent on veins; petioles 1.5-4.5 cm, slender, glabrous. Inflorescence usually pendent of single flowers or several borne on short branches, sometimes with reduced leaves, peduncles 1-4 mm; bracteoles 2-6 mm, lanceolate, caducous; pedicels 6-24 mm; sepals subequal, 6-12(-15) × 6-7(-8) mm, elliptic, obtuse, abaxially finely puberulent to almost glabrous, adaxially pubescent, margins somewhat scarious; corolla 5-6(-9) cm long, white with dark red throat, glabrous except pubescent tips of the midpetalline bands, limb 5-5.5 cm diam.; stamens 12-30 mm long; stigma globose to elongate. Capsules ellipsoid, 20 × 10 mm, glabrous; seeds 8-10 × 3-4 mm. long-pilose on margins. Reported to be a night flowering species.

Illustration.

Figure 9B .

Distribution.

Dry, deciduous forest in scattered disjunct locations from Peru through Central America to southern Mexico at relatively low altitudes of 50-900 m,

PERU. Piura: Tondopa-Ayabaca, A. Gentry et al. 75132 (MO); Paita, O. Haught 60a (F, US); Cerro Viento, O. Haught 201 (F, US).

ECUADOR. Loja: A. Samaniengo & F. Vivar 022 (US).

EL SALVADOR. Santa Ana, Metapán, J. Monterrosa 92 (BM); La Libertad, K. Sidwell et al. 512 (BM, MO); A. Munro et al. 3676 (BM).

HONDURAS. Cox & Guzman 254 (MO), fide D.F. Austin.

GUATEMALA. H. Pittier 1859 (US), fide D.F. Austin.

MEXICO. Chiapas: A. Reyes Garcia et al. 1483 (BM, MEXU). Colima: Ixtlahuacan, M. Navarrete de la Paz 799 (MEXU). Guerrero: Papanoa, E. Langlassé 736 (GH, K, P, US); Tierra Colorada, H. Kruse 2373 (MEXU). Jalisco: Chamela, S. Bullock 905 (MEXU); La Huerta, S. Bullock 1068 (MEXU, MO); ibid., J. Calónico 7732 (MEXU). Michoacán: Águila, A. Lozano & M.A. Garcia 7099 (MEXU); El Camalote, E. Carranza & I. Silva 6690 (IEB, MEXU). Oaxaca: Tehuantepec, M. Elorsa 7781 (MEXU); Santiago Astata, Chacalapa, C.E. Hughes & M. Elorsa 1911 (FHO, MEXU). Puebla: C. Rojas-Martínez 85 (MEXU). Tabasco: fide McPherson (1981). Veracruz: Cerro Gordo, J. Dorantes et al. 01757 (MEXU); Chicuasen, S. Avendano et al. 45 (K, MEXU)

Note.

McPherson (1981) recognised two subspecies but these are poorly defined morphologically and are not recognised here.

Figures

Figure 9. Pollen of Ipomoea species. A I. hieronymi (Wood et al. 28055) B I. wolcottiana (Hughes et al. 1911) C I. bonariensis (Wood et al. 27871) D I. bahiensis (Queiroz 15975) E I. maurandioides (Krapovickas & Cristobal 1573) F I. corymbosa (Jurgensen 612) G I. sericosepala (Wood 28122) H I. tiliifolia (Beddome 5581). Photos by Robert Scotland.