Ipomoea amnicola subsp. chiliantha

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

340b. Ipomoea amnicola subsp. chiliantha (Hallier f.) J.R.I. Wood & Scotland, comb. & stat. nov

urn:lsid:ipni.org:names:

Ipomoea chiliantha Hallier f., Bull. Herb. Boiss. 7 (5), append. 1: 50. 1899. (Hallier 1899c: 50). Type. PARAGUAY. "Villa occidental", Lorentz s.n. (holotype B†, lectotype GOET, designated by Wood et al. 2015: 29).

Type.

Based on Ipomoea chiliantha Hallier f.

Diagnosis. Inflorescence of usually long pedunculate, axillary cymes, sometimes compounded; peduncles 5-13 cm; outer sepals c. 6 × 4 mm long, inner c. 7 × 5 mm; corolla 4-5.5 cm long, pink, darker in the centre, limb 3-3.5 cm diam.; seeds 7 × 4 mm.

Illustration.

Figure 163 ; O’Donell (1959b: 147) as Ipomoea chiliantha .

Distribution.

This subspecies seems to prefer seasonally flooded swampy ground both in Bolivia, Paraguay and the Brazilian Pantanal.

ARGENTINA. Misiones: T.M. Pedersen 5497 (C, S). Chaco: Isla Anequera, A. Krapovickas & C. Cristóbal 12733 (CTES), A. G. Schulz 2059 (CTES, LIL). Formosa: Dept. Pilcomayo, C. Cristóbal et al. 2146 (CTES), Santa Fe: Pensiero & Tivano 3212 (CTES). Corrientes: Dept. Capital, S.G. Tressens et al. 769 (CTES, MO).

PARAGUAY. Alto Paraguay: Est. Cerrito, F. Mereles 7006 (FCQ). Central: Ypacaraí, E. Hassler 11582 (BM, K), 12532 (BM). Concepción: San Luis: K. Fiebrig 4485A (BM, K, MO). Cordillera: E. Hassler 1856 (K); E. Zardini & U. Velázquez (MO). Presidente Hayes: Est. Santa Maria del 12, M. Peña-Chocarro et al. 2565 (BM, FCQ); km 130, Ruta Transchaco, F. Mereles 2244 (CTES), Puente Remanso, F. Mereles 4460 (FCQ); km 58, Ruta Transchaco, A. Krapovickas & C. Cristóbal 43220 (CTES, F, FCQ, K). San Pedro: abundant in plain west of Com. 25 de Diciembre, J.R.I. Wood & G. González 28473 (FCQ); between Río Apa y Río Aquidaban, K. Fiebrig 4483 (BM).

BRAZIL. Mato Grosso do Sul: Puerto Murtinho, Robert 885 (K).

BOLIVIA. Beni: Cercado, Puerto Varodor, Maldonado et al. 58 (LPB). Santa Cruz: Chiquitos, El Tinto-Quimome, J.R.I. Wood & B. Williams (OXF, K, LPB, USZ); Germán Busch: Yacuses, J.R.I. Wood & D. Villarroel 25541 (K, LPB, UB, USZ); Ñuflo de Chávez J.R. Abbott 16966 (BOLV, HSB, LPB, MO, USZ); Puente San Miguelito, J.R.I. Wood et al. 27743 (OXF, K, LPB, USZ).

Note.

Subsp. chiliantha has the appearance of a large-flowered subsp. amnicola and intermediates occur particularly in the Corumbá region. Parada et al. 947 (USZ, MO, OXF) from Carmen Rivero Tórrez and Wood & Pozo 26078 (K, LPB, UB, USZ) from San José de Chiquitos are examples from Bolivia but intermediates appear more commonly in the Brazilian Pantanal.

• Species 341-343 comprise a small clade with distinctive ribbed sepals

Figures

Figure 163. Ipomoea amnicola subsp. chiliantha. A habit B outer sepal C inner sepal D corolla opened out to show stamens E ovary and style F fruiting cyme G fruiting calyx and capsule. Drawn by Rosemary Wise A E from Mereles 162; B-D from Petersen 5497; F, G from Mereles 2550.