Ipomoea fiebrigii Hassl. ex 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

16. Ipomoea fiebrigii Hassl. ex O'Donell , Lilloa 14: 169. 1948. ( O’Donell 1948a: 169)

Type.

PARAGUAY. Río Alto Paraná, Ñucañy, Feb. 1908, K. Fiebrig 5675 (holotype LIL001244, isotypes SI, US).

Description.

Perennial from a xylopodium, stems erect, 30-60 cm high, pilose. Leaves with very short internodes, subsessile, divided into 5-7 segments, segments 2-4.5 × 0.1-0.3 cm, linear, acute, pilose, strongly inrolled; petioles 0-1 mm. Inflorescence of solitary, shortly pedunculate, axillary flowers, peduncles 2-3 mm; bracteoles 4 mm, lanceolate, caducous; pedicels 3-7 mm; sepals slightly unequal, outer 9-11 × 4-4.5 mm, oblong-lanceolate, acute, pubescent with white hairs, inner sepals c. 5 mm wide, oblong-ovate, obtuse, densely white-piloset, the margins slightly scarious; corolla 4.5-5.5 cm long, funnel-shaped, pink, tomentose with long white hairs outside, limb 4.5 cm diam., unlobed. Capsules ovoid, c. 10 mm wide, glabrous; seeds glabrous.

Illustration.

Figure 19 .

Distribution.

A rare species endemic to eastern Paraguay.

PARAGUAY. Alto Paraná: Itakyry, K. Fiebrig 6706 (LIL); Reserva Tatí Yupí, Itaipú Binacional 1081 (MO).

Note.

This species is distinguished by its linear, almost filiform leaf segments, shortly pedunculate axillary flowers and the white-pilose indumentum of the corolla and inner sepals.

Figures

Figure 19. Ipomoea fiebrigii. A habit B leaf C outer sepal D inner sepal E corolla opened out F ovary and style. Drawn by Rosemary Wise from Itaipu Binacional 1081.