Ipomoea mucronatoproducta

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

359. Ipomoea mucronatoproducta J.R.I. Wood & Scotland, Kew Bull. 70 (31): 34. 2015. (Wood et al. 2015: 34)

Type.

BOLIVIA. Santa Cruz, Prov. Germán Busch, Rincón del Tigre, portón de la entrada a la Misión, sobre el camino hacia Carmen Rivero Tórrez, J.R.I. Wood & D. Villarroel 25474 (holotype USZ; isotypes K, LPB, UB).

Description.

Glabrous trailing herb, probably perennial, stems to 1.5 m long. Leaves petiolate, narrowly deltoid, 1.5-3.2 × 0.4-1 cm (measured above intersection with petiole), apex obtuse and minutely mucronate, base strongly sagittate, the auricles deltoid, lanceolate, acute, basally asymmetric, 1-2.5 × 0.2-0.6 cm so leaves sometimes appearing 3-lobed, both surfaces glabrous; petioles 1.1-2.7 cm. Inflorescence of solitary or paired, axillary, pedunculate flowers; peduncles 2.6-4 cm; bracteoles 2-3 × 1 mm, ovate, acuminate, caducous; secondary peduncles (when present) 10 mm; pedicels 6-16 mm, thickened upwards; sepals unequal, oblong-lanceolate, acuminate to a fine aristate point, outer shorter, 11-12 × 2-2.5 mm, inner 15-16 mm; corolla 7-8 cm long, narrowly funnel-shaped with a long narrow basal tube, glabrous, tube deep pink inside, limb 5-6 cm diam., pale pink, unlobed, the midpetaline bands terminating in a fine point 5-6 mm long; Capsules (immature) ovoid, 7 × 6 mm, glabrous; seeds not known.

Illustration.

Figures 8R , 173A-G .

Distribution.

A characteristic species of seasonally flooded campo around the Pantanal with several records from Mato Grosso do Sul and eastern Bolivia.

BRAZIL. Mato Grosso: 68 km W of Jardim, A. Krapovickas & A. Schinini 327519 (FTG). Mato Grosso do Sul: Mun. Corumbá, Porto Esperança, B. Lutz s.n. (R); Mun. Corumbá, Faz. Acurizal, A. Pott et al. 3642 (CPAP); Mun. Miranda, Est. Caiman, A. Pott et al. 7944 (CPAP); Mun. Bonito, Lagoa das Pedras, V.J. Pott et al. 4156 (CPAP); Mun. Bela Vista, G. Hatschbach et al. 74293 (MBM).

BOLIVIA. Germán Busch: Rincón del Tigre, J.R.I. Wood et al. 27242 (K, LPB, USZ); M. Atahuachi et al. 1887(LPB); 30 km S. of Rincón del Tigre, J.R.I. Wood et al. 28824 (USZ).

Note.

Ipomoea mucronatoproducta sometimes grows with and is similar in habit and leaf shape to I. maurandioides . In the field it is readily distinguished by the corolla lobes which terminate in a long fine point 5-6 mm in length. Herbarium specimens are best identified by the finely acuminate sepals, the inner ones reaching 15 mm in length.

Figures

Figure 8. Corollas showing variations in form (side view), size, limb lobing and stamen exsertion. A Ipomoea argentea B I. repanda C I. neei D I. electrina E I. habeliana F I. santillanii G I. nationis H I. rubriflora J I. longistaminea K I. megapotamica L I. megalantha M I. neriifolia N I. syringifolia P I. ramosissima Q I. elongata R I. mucronatoproducta. A from Wood et al. 25639 and photo; B from Whitefoord 5244; C from Skutch 2043; D from Breedlove 27626; E from Bentley 203; F from Bourgeau 3024; G from Saunders 987; H from Wood et al. 27678; J from Pastore et al. 2678; K from Wood et al. 28060; L from Hassler 9114; M from Rezende et al. 1011; N from Stutz 1426 and photo; P from Bang 2246; Q from Purpus 3904; R from Wood & Villarroel 25474. Drawn by Rosemary Wise.

Figure 173. A-G Ipomoea mucronatoproducta. A habit B outer sepal C inner sepal D corolla opened out to show stamens E ovary and style F. shoot with your fruiting inflorescence G calyx with young fruit. Drawn by Rosemary Wise from Wood & Villarroel 25474.