Ipomoea huayllae

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

300. Ipomoea huayllae J.R.I. Wood & Scotland, Kew Bull. 70 (31): 108. 2015. (Wood et al. 2015: 108)

Type.

BOLIVIA. La Paz, Prov. Tamayo, ANMI Apolobamba, camino Pelechuco-Apolo, entre Puente Coronara y Hac. Corapara, A. Fuentes & H. Huaylla 12939 (holotype LPB; isotypes MO, OXF, K).

Description.

Twining herb, possibly annual, stems thinly pubescent with spreading hairs when young, glabrescent when older. Leaves petiolate, 6-10 × 3-7 cm, ovate, acute and finely mucronate, base cordate with rounded auricles, margin entire to slightly undulate; petioles 1-7 cm, pubescent. Inflorescence of solitary axillary flowers (rarely a second, non-developing flower present); peduncle, 3-5.5 cm, pubescent, penetrating leaf sinus; bracteoles 1 × 0.25 mm, deltoid, obtuse, green with white margins; pedicels 6-12 mm, thickened upwards, pubescent; sepals slightly unequal, outer 6 × 2.5 mm, acute, green, pubescent, the hairs with swollen bases, margins scarious, glabrous, inner sepals 7-9 × 4 mm, broadly oblong-elliptic, minutely mucronate, only the middle green and pilose, the margins and apex scarious, glabrous; corolla glabrous, c. 4 cm long, funnel-shaped with the rim of the limb recurved, pale blue with whitish tube and midpetaline bands, limb c. 4 cm diam., unlobed, midpetaline bands ending in a point. Capsules glabrous, ovoid, 14-15 × 11 mm; seeds 7 × 6 mm, flattened-ovoid, dark brown, superficially glabrous but minutely pilosellous under a microscope.

Illustration.

Figure 147 .

Distribution.

Endemic to Bolivia and only known from Yungas cloud forest with secondary vegetation between 2100-2300 m in the ANMI Apolobamba.

BOLIVIA. La Paz: Prov. Tamayo, ANMI Apolobamba, camino Pelechuco-Apolo, H. Huaylla et al. 2754 (MO, OXF).

Note.

Closely related to Ipomoea aristolochiifolia as apparent from the peculiar placement of the peduncle in the leaf sinus but immediately distinguished by the larger corolla c. 4 cm long (not 1.5-2.5 cm), the pubescent sepals and the larger leaves, pubescent beneath.

Figures

Figure 147. Ipomoea huayllae. A habit B inflorescence showing position of peduncle C outer sepal D inner sepal E corolla opened out to show stamens F capsule G seed. Drawn by Rosemary Wise A, G-F from Fuentes et al. 12939; B-E from Huaylla et al. 2754.