Ipomoea paludosa O'Donell

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

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Ipomoea paludosa O'Donell


9. Ipomoea paludosa O'Donell   , Lilloa 23: 495. 1950. ( O’Donell 1950b: 495)

Ipomoea malvaeoides var. integrifolia Chodat & Hassl.   , Bull. Herb. Boiss. Ser. 2, 5: 690. 1905. (Chodat and Hassler 1905: 690). Type. PARAGUAY. Canindeyú, Río Jezuí Guazú, E. Hassler 5734 (lectotype G00175132, designated here; isolectotypes BM, G, GH, K, MPU, P).

Ipomoea malvaeoides forma apiculata Chodat & Hassl.   [as var. uliginosa   forma apiculata   ], Bull. Herb. Boiss., ser. 2, 5: 691. 1905. (Chodat and Hassler 1905: 691). Type. PARAGUAY. Cordillera, Tobatí, E. Hassler 6274 (?G, n.v.).

Ipomoea malvaeoides var. uliginosa Chodat & Hassl.   , Bull. Herb. Boiss. Ser. 2, 5: 691. 1905. (Chodat and Hassler 1905: 691). Type. PARAGUAY. Cordillera, Tobatí, E. Hassler 6405 (lectotype G, n.v., designated by O’Donell (1953a: 373), isolectotype BM000089442).

Ipomoea paludosa var. uliginosa (Chodat & Hassl.) O'Donell   , Lilloa 26: 373. 1953. ( O’Donell 1953a: 373). Type. Based on Ipomoea malvaeoides var. uliginosa Chodat & Hassl.  


ARGENTINA. Misiones, Dept. San Ignacio, Gob. Roca, G. J. Schwarz 5283 (lectotype LIL001271, designated here; isolectotypes CTES, LIL).


Erect undershrub 0.5-1.5 m from a woody rhizome, stems glabrous or with a few scattered hairs, sparingly branched, often simple. Leaves shortly petiolate, 2.5-11 × 0.6-2.2 cm, oblanceolate, acute or rounded and strongly apiculate, cuneate at base, adaxially glabrous to thinly adpressed pilose, abaxially adpressed pilose, veins prominent on both surfaces, esp. abaxially; petioles 0.5-1 cm long, thinly pubescent. Inflorescence long, terminal, raceme-like, formed of mostly2-3-flowered cymes, commonly reduced to single flowers; bracts leaf-like but diminishing in size upwards; peduncles 0.2-3 cm long; bracteoles 3-4 mm, lanceolate, caducous; pedicels 2-10 mm, pubescent; sepals 5-8 mm, ovate, acute to obtuse and apiculate, sericeous to pubescent, inner sepals similar but obtuse and with glabrous, scarious margins; corolla 3.5-5.5 cm long, pink, funnel-shaped, sericeous on midpetaline bands, limb 2-2.5 cm diam., undulate. Capsules c. 8 × 6 mm, ovoid, glabrous; seeds long-pilose.


O’Donell (1959b: 213); Figure 15C View Figure 15 .


Flooded plain in the Paraná basin in Argentina, Brazil and Paraguay. ARGENTINA. Misiones: San Ignacio, F.O. Zuloaga & M. Kostlin 9948 (SI); Candelaria, H. Keller & Paredes 10563 (CTES); Bonpland, E.L. Ekman 1432 (K, S); Capital, T.M. Pedersen 13661 (C, CTES).

PARAGUAY. Alto Paraná: Est. Río Bonito, E. Zardini & Vieira 41978 (FTG, PY). Amambay: Est. Carmen de la Sierra, N. Soria 4725 (CTES, FCQ). Caaguazú: Coronel Oviedo, A. Krapovickas et al. 13848 (CTES). Caazapá: Enramadita, I. Basualdo 001902 (FCQ, MO, FTG). Canindeyú: Reserva Mbaracuyú, B. Jiménez & G. Marín 1962 (BM, MA). Central: A. Schinini 5717 (CTES). Concepción: Est. Ybyraty, F. Mereles 8580 (CTES, FCQ). Cordillera: Peribebuy, B. Balansa 4392 (P); Tobatí, R.O. Vanni et al. 185 (CTES, PY). Guairá: Cordillera de Ybyturuzú, F. Mereles 3724 (FCQ). Itapúa: Yacyreta Island Reserve, E. Zardini & Gamarra 55715 (ARIZ); Trinidad, M. Ortiz 850 (FCQ). Paraguarí: 3 km antes de Caballero, Calviño et al. 3774 (FCQ). San Pedro: Est. San Antonio, N. Soria 5363 (CTES, FCQ).

BRAZIL. Mato Grosso do Sul: Faz. Campo Alto, Corumbá, A. Pott et al. 5576 (CPAP, CTES); Hatschbach et al. 76514 (MBM).


Plants from Argentina are relatively uniform but in Paraguay they are more variable, the leaves sometimes strongly apiculate and/or the inflorescence rather lax and few-flowered.