Ipomoea dasycarpa

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

43. Ipomoea dasycarpa J.R.I. Wood & Scotland, Phytokeys 88: 12. 2017. (Wood et al. 2017d: 12)

Type.

BRAZIL. Goiás, P.N. Chapada dos Veadeiros, ca. 1100 m, perto da sede do parque, J.R. Pirani, R.M. Harley, B.L. Stannard, A. Furlan & C. Kameyama 1715 (holotype SPF00049438, isotype K).

Description.

Erect perennial subshrub to 1 m, rootstock unknown, presumably a xylopodium, stem densely tomentose with white hairs. Leaves very shortly petiolate, 2.5-11 × 1-3.5 cm, oblong to narrowly-oblong-elliptic, margin entire, base cuneate, apex acute, mucronate, the mucro often bent, adaxially green, tomentose, abaxially whitish, tomentose, veins prominent; petioles 2-5 mm, tomentose. Inflorescence terminal formed of shortly pedunculate, 3-flowered cymes arising in the axils of the reduced uppermost leaves; peduncles 1-5.5 cm, grey-tomentose; lower bracteoles 15-20 × 4-7 mm, foliose, elliptic, acuminate to a fine point and ± mucronate, tomentose, persistent; upper bracteoles similar, but slightly smaller; pedicels 0-11 mm, tomentose; sepals subequal, outer 15-18 × 6-8 mm, ovate, acuminate, submucronate, tomentose, inner 14-15 × 5-7 mm, tomentose with broad glabrous margins; corolla 4.5-5 cm long, funnel-shaped, pink, tomentose in bud, limb c. 4 cm diam., entire. Capsules 9 × 5 mm, ovoid, muticous, comose with shaggy, somewhat deciduous hairs; seeds 6 × 3 mm, glabrous apart from the fine white marginal hairs c. 5-6 mm long.

Illustration.

Figure 31 .

Distribution.

Endemic to relatively high altitudes between 1000 and 1250 m in the Chapada dos Veadeiros in Goiás, Brazil, apparently growing in rocky cerrado.

BRAZIL. Goiás: Chapada dos Veadeiros, c. 20 km W of Veadeiros, H.S. Irwin et al. 12407 (FTG114226); 10 km S of Alto do Paraíso, H.S. Irwin et al. 24946a (FTG114228); 18 km N of Alto do Paraíso, H.S. Irwin et al. 32875 (FTG114227); perto da sede do Parque, J.R. Pirani et al. 1715 (K, SPF).

Note.

Ipomoea dasycarpa appears close to Ipomoea verbasciformis but is distinguished by the larger dimensions of the leaves, bracteoles and sepals, by the strongly mucronate leaves, acuminate, submucronate (not obtuse) sepals and the comose (not glabrous) ovary. Hirsute capsules are rare in Ipomoea and found outside the Batatas Clade in only a few species such as the unrelated I. sidifolia and I. velutinifolia .

Figures

Figure 31. Ipomoea dasycarpa. A habit B leaves and stem C adaxial leaf surface D abaxial leaf surface E outer sepal F inner sepal G fruiting inflorescence with fallen bracteoles H apex of capsule J seed. Drawn by Rosemary Wise A-D from J. R. Pirani et al. 1715; E, F, H J from H. S. Irwin et al. 32875; G from H. S. Irwin et al. 24946.