Ipomoea ternifolia subsp. leptotoma (Torr.)

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

334b. Ipomoea ternifolia subsp. leptotoma (Torr.) J.R.I. Wood & Scotland, comb. & stat. nov

urn:lsid:ipni.org:names:

Ipomoea leptotoma Torr., in Emory, Rep. U.S. Mex. Bound. 2(1): 150. 1859. (Torrey 1859: 150). Type. MEXICO. Sonora, Thurber 977 (lectotype GH00267279, designated by House (1908b: 235), isolectotype NY).

Pharbitis leptotoma (Torr.) Peter Nat. Pflanzenfam. IV (3a): 31. 1891 [dated 1897]. (Peter 1891: 31).

Ipomoea ternifolia var. leptotoma (Torrey) J.A. McDonald, Harvard Pap. Bot. 6: 120. 1995. (McDonald 1995: 120).

Ipomoea radiatifolia Kellogg , Proc. Calif. Acad. Sci. 7: 163. 1876 [pub. 1877]. (Kellogg 1877: 163). Type. [MEXICO. Sonoro], Gulf of California, Ajiabampo, W.J. Fisher s.n. (whereabouts unknown).

Ipomoea leptotoma var. wootonii E.H. Kelso , Rhodora 39: 151. 1937. (Kelso 1937: 151). Type. UNITED STATES. Arizona, Santa Rita Mountains, E.O. Wooton s.n. (holotype US00390627).

Ipomoea leptotoma forma wootonii (E.H. Kelso) Wiggins, Contr. Dudley Herb. 4: 21. 1950. (Wiggins 1950: 21).

Ipomoea divergens House , Muhlenbergia 3: 40. 1907. (House 1907a: 40). MEXICO. Sonora, Guaymas, E. Palmer 231 (holotype US00390633, isotypes C, GH, K, NDG, NY YU).

Type.

Based on Ipomoea leptotoma Torr.

Diagnosis. Plants relatively robust, initially suberect, eventually decumbent or twining. Longest leaf segments on mature branches 4-7 cm long; sepals lanceolate usually 9-14 mm long, rarely less; corolla 2.5-4.5 cm long.

Distribution.

Essentially a plant of the Sonora Desert region of Arizona and NW Mexico with a few records from outside this area.

MEXICO. Baja California Sur: Bahía de Concepción, I.L. Wiggins 11421 (US); A. Carter 4969 (MEXU); Cerro de la Giganta, A. Carter & L. Kellogg 3136 (BM); Arroyo del Rancho de la Presa, J.L. León de la Paz 9807 (IEB). Chihuahua: Batopilillas, 2624 (CAS, F, GH, K, MEXU, S, US). Est. México & Dist. Fed.: Temascaltepec, Chorrera, G.B. Hinton 1822 (K), ibid., Plaza de Gallos 5176 (BM, K), ibid., 8499 (GH, NY); Guerrero: Mezcala, A.A. Monroy 685 (MEXU); Coyuca, G.B. Hinton 5459 (BM, K), ibid., 6471 (BM, K). Puebla: Jolalpan, SW of San Pedro Las Palmas, R. Razo & R. Garcia 8 (IEB); Jolalpán, E. Guizar 1410 (MEXU). Sinaloa: Imala, E. Palmer 1705 (F, GH, NY, S, US); San Ignacio, R. Vega & J.A. Gutiérrez 9415 (MEXU); ibid., J. González Ortega 583 (K), H.S. Gentry 9483 (CAS, GH, NY); Choix, El Potrerilos, J. González Ortega 872 (K). Sonora: I.L. Wiggins & Rollins 280 (CAS, GH, MO, NY, US); Tecolote road, F.W. Reichenbacher 1038 (ARIZ); W of El Sabino, P. Tenorio et al. 4609 (IEB, MEXU); Mun. Cucurpe, T.R. Van Devender 90-477 (ARIZ); Cajón de los Guerrijos, C. E. Lloyd 431 (GH, K); Oputo, C.V. Hartman 195 (CAS, GH, K, US).

UNITED STATES. Arizona: J.G. Lemmon 3039 (BM, CAS, F, US); Gooding 2436 (CAS, GH, S); Cochise County (probably), C. Wright 1614 (BM, GH, K, MO, NY, US); ibid., E. Makings 868 (ASU); Pima Co., D.F. & S. Austin 7595 (ARIZ). New Mexico fide Austin (1991b).