Ipomoea chrysocalyx D.F. Austin

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

110. Ipomoea chrysocalyx D.F. Austin , Flora of Ecuador 15: 45. 1982. (Austin 1982a: 45)

Type.

ECUADOR. El Oro, below Zaruma, Asplund 15851 (holotype S07-4785, isotype GB).

Description.

Twining perennial; stems relatively stout, thinly pilose with pale hairs, latex white. Leaves petiolate, 10-17 × 7-13 cm, ovate, acute to shortly acuminate, cordate, both surfaces appressed pubescent to ± glabrous, the venation spreading at a wide angle, prominent; petioles 4-11 cm. Inflorescence of shortly pedunculate compact axillary cymes with up to 9 flowers; peduncles 2-3.7 cm; bracteoles 7-15 mm, oblong-oblanceolate, relatively persistent; secondary peduncles 8-10 mm; pedicels 3-5 mm, puberulent to pilose; sepals 11-14 × 4-5 mm, subequal, oblong-ovate, obtuse to subacute, densely pubescent; corolla 4-5.5 cm long, funnel-shaped from a very short greenish basal tube, glabrous, white, limb angled but not lobed, 3.5 cm diam. Capsules and seeds unknown.

Illustration.

Figure 73 .

Distribution.

A rare species of Ecuador and northern Peru growing in thickets and on rocky slopes between 600 and 1800 m.

PERU. Amazonas: Prov. Bongará, 21 km N of Pedro Ruíz, T. Croat 58306 (FTG, MO, OXF).

ECUADOR. El Oro: Porto Velo-Lourde trail to Salatí, G. Harling & L. Andersson 14306 (GB, MO). Loja: Chaguarpampa, F. de la Puente 1260 (CIP); N. of Macará, G. Harling & L. Andersson 18286 (GB); Alamor-Zaderos, G. Harling & L. Andersson 17814 (GB).

Note.

The placement of this species is provisional. The pubescent corolla and calyx strongly support its placement in Clade A but a final decision cannot be made until this species has been successfully sequenced.

Figures

Figure 73. Ipomoea chrysocalyx. A habit B abaxial leaf surface C outer sepal D middle sepal E inner sepal F corolla open out to show stamens G ovary and style. Drawn by Rosemary Wise A from T. Croat 58306; B-G from G. Harling & L. Andersson 14306.