Ipomoea minutiflora (M. Martens & Galeotti) 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

336. Ipomoea minutiflora (M. Martens & Galeotti) House , Muhlenbergia 5: 71. 1909. (House 1909a: 71)

Convolvulus minutiflorus M. Martens & Galeotti , Bull. Acad. Roy. Sci. Bruxelles 12: 262. 1845. (Martens and Galeotti 1845: 262). Type. MEXICO. Oaxaca, H. Galeotti 1372 (holotype BR0006973018, isotypes BR, G, K, P).

Ipomoea filipes Benth. ex Meisn. in Martius et al. , Fl. Brasil. 7: 274. 1869. (Meisner 1869: 274).Type. BRAZIL. Pará, Santarém, R. Spruce s.n. (holotype M0185021, probable isotypes K, NY, OXF, TCD).

Ipomoea gracillima Peter , Nat. Pflanzenfam. 4 (3a): 30. 1897 [pub. 1891], (Peter 1891: 30). Type. VENEZUELA. A. Fendler 2089 (lectotype GOET005720, designated by Staples et al. 2012: 675, isolectotypes K, MO).

Type.

Based on Convolvulus minutiflorus M. Martens & Galeotti

Description.

Annual herb; stems trailing, spreading from a central rootstock, pilose with white bulbous based whitish hairs, sometimes glabrescent. Leaves petiolate, 0.5-2.7 × 2.5, broadly ovate to subreniform, abruptly and shortly acuminate, base cordate with rounded auricles, margins ciliate, both surfaces thinly pilose to glabrous; petioles 2-17 mm, pilose. Inflorescence of solitary axillary flowers or few-flowered cymes often appearing to form apparently terminal panicles at the branch tips; peduncles 1-3 cm, filiform, usually straight, often arising through the sinus at the base of the leaf, thinly pilose; bracteoles c. 1 × 0.25 mm, linear-lanceolate, glabrous; secondary peduncles, if present, 2-2.5 cm, glabrous; pedicels 1.5-6 mm, often recurved or bent at an angle to the peduncle, glabrous; sepals subequal, 2-3 × 1 mm, accrescent to 3.5-4 mm in fruit, lanceolate, acuminate, pilose, margins narrow, white; corolla 4.5-5 mm long, pale yellow, campanulate, glabrous. Capsules globose, muticous, c. 3 mm. glabrous; seeds 2 × 1.5 mm, rounded-trigonous, minutely puberulent.

Illustration.

Austin (1975b: 208); Figures 11N , 159 .

Distribution.

Deciduous tropical forest in northern South America to northern Mexico, usually at low altitudes except in Mexico where it reaches 1600 m. Widespread but very scattered and rather uncommon.

BRAZIL. Dist. Fed.: E.P. Heringer 3810 (MO). Pará: Carajás, F.D. Gontijo 183 (RB).

COLOMBIA. La Guajira: T. Saravia 2899 (COL). Magdalena: Santa Marta, H.H. Smith 1589 (BM, COL, K, MO, P, S); Tucarinca, C. Romero 577 (COL).

VENEZUELA. Aragua: H. Pittier 15639 (US, VEN). Bolívar: T. Sprague s.n. (K). Carabobo: Barbula, Valencia-La Entrada, A.H.G. Alston 5628 (BM). Guárico: Est. Biol. Calabozo, L. Aristeguieta & F. Tamayo 4394 (MO, VEN). Monagas: Ezequiel Zamora, A. Fernández 10184 (COL). Also Barinas and Yaracuy fide Austin (1982b).

PANAMA. W.H. Lewis et al. 3004 (MO, RB).

COSTA RICA. Nicoya, A. Tonduz 13669 (BM, K); Puntoarenas, P.N. Corcovado, R. Aguilar 3777 (BM, INB, K, MO); ibid., B. Hammel 18761 (CR, F, MO); ibid., Aguirre, A. Estrada et al. 2641 (CR, K).

NICARAGUA. P.N. Volcán Masaya, D. Neill 2812 (BM, MO); Chontales, W.D. Stevens & O.M. Montiel 26592 (BM, MO).

EL SALVADOR. Morazán, Montecristo, J.M. Tucker 438 (K); Sonsonate, D. Rodríguez & J. Trejo 00139 (B, BM, LAGU, MO, W).

HONDURAS. A. Molina 18392 (F); Comayagua, C.H. Nelson et al. 6074 (MO).

BELIZE. Stann Creek, W.A. Schipp 740 (BM, K, MO, S).

GUATEMALA. Santa Rosa, Chupadero, W.C. Shannon 4026 (K).

MEXICO. Baja California Sur: Los Cabos, R. Domínguez Cadena 2455 (MEXU). Campeche: Chan 6156 (CICY). Chiapas: Tonala, C.A. Purpus 6909 (BM, MO, NY). Chihuahua: Río Moris junction with Río Agua Caliente, P.D. Jenkins 91-79-A (ARIZ). Colima: C.R. Orcutt 4536 (BM, MEXU, MO). Est. México & Dist. Fed.: Temascaltepec, G.B. Hinton 5002 (GBH, K). Guerrero: Galeana, San Luis, G.B. & J.C. Hinton 10864 (GBH, K, MO); Acapulco, E. Palmer 109 (K). Jalisco: La Huerta, M.G. Ayala 1023 (K). Michoacán: Huetamo, Tacupa, G.B. Hinton 7119 (K). Morelos: Ixtla, R. Ramírez et al. 3924 (MEXU). Nayarit: San Blas, G. Flores & R. Ramírez 2479 (MEXU). Oaxaca: Tehuantepec, E. Martínez & M. Elorsa 32727 (MEXU); Pochutla, A. Sánchez Martínez & A. Nava 357 (MEXU). Puebla: Acatlan, R. Miranda 2461 (MEXU). Sinaloa: Imala, E. Palmer 1674 (S, US); Las Mesas, Sierra Surotato, H.S. Gentry 6665 (DES); Sonora: Pinal, Río Mayo, H.S. Gentry 1687 (K, MEXU, S); Mun. Alamos, Arroyo Huirotal, T.R. van Devender 94-935 (ARIZ). Veracruz: Palmilla, F. Ventura 2690 (ASU, MEXU).

Note.

Very distinctive because of the small yellow corolla and tiny sepals.

Figures

Figure 11. Seeds of Ipomoea A I. peteri B I. murucoides C I. carolina D I. eggersiana E I. longibarbis (with and without marginal hairs) F I. clavata G I. violacea H I. acanthocarpa J I. parvibracteolata K I. meyeri L I. jujuyensis M I. cholulensis N I. minutiflora P I. tiliacea. A from Wallnoefer & Tut-Tesucun 9662; B from Pringle 6066; C from Gillis 12906; D from Urote 35; E from Killeen et al. 4199; F from Fuentes & Miranda 10895; G from Stearn 322; H from Wurdack & Monachino 39830; J from Silva et al. 18; K from Smith 1573; L from Rose et al. 23251; M from Hinton 11166; N from Stevens & Montiel 26592; P from Curtiss 249. Drawn by Rosemary Wise.

Figure 159. Ipomoea minutiflora. A habit B outer sepal C inner sepal D corolla opened out to show stamens E ovary and style F calyx and capsule G seed. Drawn by Rosemary Wise A from Neill 2812; B-G from Tonduz 13669.