Ipomoea odontophylla

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

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

Type.

BOLIVIA. Santa Cruz, Prov. Florida, bajando c. 3 km de La Yunga de Mairana, hacia el puesto de los guardeparques, J.R.I. Wood, M. Mendoza & C. Antezana 21431 (holotype USZ, isotypes K, LPB).

Description.

Twining perennial reaching 5 m in height, stems glabrous, pale brown. Leaves petiolate, 6-13 × 4-10 cm, ovate, deeply cordate with rounded auricles, apex acute to shortly acuminate, mucronate, margin denticulate with acute teeth, adaxially pubescent on the veins with scattered hairs on the intercostal areas, abaxially pubescent, veins prominent; petioles 3-8 cm, sparsely pubescent but the widened base strongly pubescent. Inflorescence of 1-5-flowered, pedunculate axillary cymes; peduncles 2.5-6 cm long, glabrous; bracteoles 1-2 × 0.5 mm, very narrowly lanceolate; pedicels 10-25 mm, notably thickened upwards and differing somewhat in texture from the peduncles, glabrous or with a few hairs at base of calyx; sepals subequal, outer 7 × 3-4 mm, lanceolate to ovate, acute or subacute, glabrous, margin scarious, inner sepals slightly larger, 8 × 4-5 mm, ovate to suborbicular, rounded, scarious except near base; corolla 4-5.5 cm long, funnel-shaped, glabrous, tube white, limb blue, drying pink, c. 3.5 cm diam., shallowly lobed; stamens included. Capsules 16 × 13 mm, ovoid, glabrous, rostrate, the mucro c. 3 mm long; seeds 9 × 4 mm, oblong in outline, brown, glabrous.

Illustration.

Figure 146 .

Distribution.

A narrowly endemic species known only from the Yunga de Mairana in the Parque Nacional Amboró near Santa Cruz, Bolivia, where it grows in somewhat disturbed cloud forest around 2200-2300 m.

BOLIVIA. Santa Cruz: Prov. Florida, La Yunga de Mairana, M. Nee et al. 52029 (K, NY, USZ); ibid., J.R.I. Wood et al. 19636 (K, LPB, USZ); ibid., J.R.I. Wood 28111 (LPB, OXF, USZ)

Note.

Readily distinguished from Ipomoea aristolochiifolia by its relatively large denticulate leaves 4-5 cm in length, larger corolla and by the peduncle that does not pass through the leaf sinus.

Figures

Figure 146. Ipomoea odontophylla. A habit B flowering shoot C stem D adaxial leaf surface E abaxial leaf surface F outer sepal G middle sepal H inner sepal J corolla opened out to show stamens K stamen L ovary and style M capsule N seed. Drawn by Rosemary Wise A-L from Wood et al. 21431; M, N from Nee et al. 52029.