Ipomoea chenopodiifolia (M. Martens & Galeotti) Hemsl.

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

266. Ipomoea chenopodiifolia (M. Martens & Galeotti) Hemsl. , Biol. Cent.-Amer., Bot., 2: 385. 1882 (Hemsley 1882: 385)

Calonyction chenopodiifolium M. Martens & Galeotti , Bull. Acad. Roy. Sci. Bruxelles 12: 269. 1845. (Martens and Galeotti 1845: 269). Type. MEXICO. Oaxaca, Yavezia, H. Galeotti 1375 (holotype BR00006972929).

Type.

Based on Calonyction chenopodiifolium M. Martens & Galeotti

Description.

Trailing or scrambling liana, 2-4 m high, stems woody, glabrous or thinly pubescent. Leaves petiolate, 3-12 × 2-10.5 cm, ovate, acute to shortly acuminate, shallowly cordate, thinly pubescent to glabrous on both surfaces, abaxially prominently veined; petioles 3-5 cm, pubescent or glabrous. Inflorescence of few-flowered, pedunculate, axillary cymes; peduncles stout, woody, 6-18 cm long, bifariously pubescent; bracteoles caducous, not seen; secondary peduncles 1-1.7 cm; pedicels 15-25 mm, slightly thickened upwards, glabrous to pubescent; sepals unequal, outer 7-9 × 2-3 mm, lanceolate, acute, glabrous, inner 10-12 × 4-5 mm, oblong-ovate, obtuse to rounded, the margins broad, scarious; corolla variable in shape from hypocrateriform to funnel-shaped, the tube 3.5-4.5 cm long, c. 7-8 mm wide, limb 3.5-4.5 cm wide, unlobed, deep pink or magenta, stamens included to shortly exserted. Capsules 10-13 mm, conical, glabrous, rostrate; seeds 7-8 mm, shortly pubescent.

Illustration.

Figure 137 .

Variation.

This species can be divided into three subspecies based on corolla shape, exsertion of stamens and geographical distribution:

Figures

Figure 137. Ipomoea chenopodiifolia subsp. chenopodiifolia A habit showing corolla shape and exsertion of stamens and style. Subsp. signata B habit showing corolla shape and exsertion of stamens and style. Subsp. bellator C habit showing included stamens and style D outer sepal E inner sepal. Drawn by Rosemary Wise A from Olazo 1132; B from from Martinez & Garcia 22197; C from Nunez 11826; D, E from de Avila 143.