Ipomoea jujuyensis 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

289. Ipomoea jujuyensis O'Donell , Lilloa 14: 174. 1948. ( O’Donell 1948a: 174)

Type.

ARGENTINA. Jujuy, Dept. Capital, Lagunas de Yala, O’Donell 4835 (holotype LIL 182934, isotype P).

Description.

Twining perennial to 6 m from a tuberous rootstock, stems pubescent to subhispid. Leaves petiolate, ovate, shortly acuminate, cordate with rounded auricles, thinly adpressed pubescent; petioles 2-10 cm, pubescent. Inflorescence of pedunculate axillary cymes with up to five flowers; peduncle 5-15 cm, pubescent, stout; bracteoles 2-3 mm long, broadly lanceolate, caducous; pedicels 1-2.5 cm, thickened upwards, stout, pubescent, often deflexed at maturity; sepals slightly unequal, rounded and emarginate, usually mucronulate, the margins scarious, outer 6-8 × 5-6 mm, elliptic, obtuse, thinly pubescent, inner 7-8 × 8-9 mm, suborbicular, glabrous; corolla 6.5-9 cm long, funnel-shaped from a short basal tube, violet, glabrous or minutely puberulent on the midpetaline bands, limb 4.5-6 cm diam., undulate. Capsules 14-16 × 8-10 mm, ovoid, rostrate, the apex c. 4 mm long; glabrous; seeds 7 × 5-6 mm, blackish, tomentellous.

Illustration.

Figure 11L; O 'Donell (1959b: 169).

Distribution.

Scattered along the Andes from northern Argentina to Peru and southern Ecuador, mostly 1800 to 2500 m, but apparently absent from Bolivia.

ARGENTINA. Catamarca: Yacutula, F. Schickendantz 70 (CORD); Belén, G.E. Barboza et al. 604 (CORD, MA); ibid., 1959 (CTES); H. & O. Brücher s.n. [21/2/1949] (S). Jujuy: Laguna Yala, O’Donell 4871 (LIL, P), 5554 (LIL, P); ibid., M.A. Negritto et al. 295 (CORD, CTES); T. Meyer 16958 (LIL). Salta: Rosario de Lermo, A.M. Ciadella 354 (SI). Tucumán: Tafi, L. Castillon 355 (LIL); S. Venturi 2917 (US).

PERU. Cusco: Paruro, Mayhura, C. Vargas 855 (LIL).

ECUADOR. Loja: C.W.T. Penland & R.H. Summers 1134 (GH, US); M. Rivet 950 (P); Loja-Zamora road, G. Harling & L. Andersson 14075 (AAU, MO). Pichincha: B. Sparre 14627 (S); F. de la Puente 1299 (CIP).

Notes.

Molecular studies indicate this species is an isolated species in Clade B. It is somewhat arbitrarily placed near Ipomoea dumetorum with which it shares a strongly rostrate capsule, scarious-margined sepals and minutely tomentellous seeds. It is easily distinguished, however, by the perennial habit, pubescent leaves, larger corolla and the absence of dark spots on the sepals.

The record from Bolivia (Wood et al. 2015) was an error for Ipomoea squamosa and there is doubt about the correct identification of the plants from Ecuador and Peru.

•• Clade B2 is composed of species 290-338. Although this clade is well supported by all our sequence data, no obvious morphological feature characterises the clade.

• Species 290-311 form a clade within B2. Although there seems to be no character uniting this clade, there are obvious species clusters such as species 290-294.

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.