Ipomoea rubriflora 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

323. Ipomoea rubriflora O'Donell , Lilloa 29: 79. 1959. ( O’Donell 1959a: 79)

Type.

ARGENTINA. Cordoba, Dept. San Alberto, entre Mina Clavero y Nono, O'Donell & Rodriguez 708 (holotype LIL, n.v., isotype NY00319220).

Description.

Similar to I. hederifolia in habit, variability of leaf shape and general features of the inflorescence but more robust, the stems distinctly angled, glabrous except at nodes. Leaves usually glabrous or nearly so; sepals unequal, glabrous or pubescent, outer sepals oblong-obovate, 3-4 × 2-2.5 mm; inner sepals 5-6 × 3-4 mm; corolla limb 2-3 cm diam., stamens very shortly exserted. Capsules strongly rostrate terminating in a persistent mucro 3-5 mm long, the fruiting pedicel erect; seeds tomentose with hairs unequal in length those bordering the central groove longer.

Illustration.

Figures 8H , 156 ; O’Donell (1959b: 234).

Distribution.

Endemic to scrubby banks in the dry inter-Andean valleys of Bolivia and northern Argentina, mostly growing between 1500 and 2700 m.

ARGENTINA. Córdoba: P.G. Lorentz 61 (BM. P). Catamarca: La Puntilla, M. Villafane 1240 (LIL, RB); Ancasti, J. Brizuela 1048 (LIL, P). La Rioja: Castellamos s.n. [4/2/140] (LIL). Jujuy: Capital, S. Venturi 8702 (BM, L, NY, S, SI); Cochinoca, Abra Pampa, S. Venturi 9372 (BM, LIL, SI). Salta: Cachi, L.J. Novara 6066 (G); R. de Lerma, L.J. Novara 6296 (G), 7883 (G, S), 9675 (S). Santiago del Estero: Cuezzo 2441 (LIL). San Luis: A. Vignati 494 (LIL, LP, NY). Tucumán: Cerro del Campo, S. Venturi 10438 (S); Tafí, R. Rocha 808 (CTES, LIL).

BOLIVIA. Chuquisaca: Azurduy, Com. San Pedro, R. Lozano et al. 3173 (MO, OXF); Boeto, Nuevo Mundo, J.R.I. Wood et al. 27657 (OXF, K, LPB); Oropeza, M. Cardenas 575 (NY); Tomina, Padilla, J.R.I. Wood 8306 (K, LPB). Cochabamba: Capinota, M. Mercado & A. Haigh s.n. (K); Mizque, W.J. Eyerdam 25205 (F, K). La Paz: Sud Yungas, Plazuela-Lambate, J.R.I. Wood et al. 29191 (LPB, USZ). Santa Cruz: Caballero, Pulquina, Com. Anamal, M. Garvizu & Muñoz 1089 (USZ, K); Vallegrande, L. Arroyo et al. 5214 (MO, USZ). Tarija: Arce, Padcaya, S.G. Beck et al. 26166 (LPB); Cercado, E. Bastian 827 (LPB, USZ); O’Connor, Serranía Nogal, M. Serrano & J. Villalobos 7436 (LPB).

Note.

Ipomoea rubriflora is most easily distinguished from similar species by the erect, rostrate fruiting capsule combined with the lobed leaves and slightly longer sepals. However, some specimens such as Hieronymus s.n. [10/1879] (BM); D.O. King 731 (BM) have erect muticous capsules although the sepals are too large for Ipomoea hederifolia so presumably belong to Ipomoea rubriflora .

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 156. Ipomoea rubriflora. A habit B adaxial leaf surface C abaxial leaf surface D outer sepals E inner sepals, middle at bottom F calyx and corolla G corolla opened up to show stamens H corolla mouth showing position of anthers. Drawn by Eliana Calzadilla A-C, G, H from Wood et al. 27678; D-F from Wood et al. 27657.