Ipomoea ciervensis Painter in House

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

131. Ipomoea ciervensis Painter in House , Bot. Gaz. 43: 408. 1907. (House 1907b: 408)

Type.

MEXICO. Querétaro, Hac. Ciervo, Rose & Painter 9660 (holotype US00036708, isotypes MEXU00025165, NY00319080).

Description.

Erect perennial subshrub to 80 cm from a tuberous rootstock, stem densely tomentose, often much branched from base. Leaves imbricate, shortly petiolate, 4-10 × 2-5 cm, elliptic, apex acute or obtuse, base cuneate, densely white-tomentose on both surfaces but paler beneath; petioles 3-5 mm. Inflorescence of solitary axillary flowers; peduncles 1.5-2 cm, densely pubescent; bracteoles 14-16 mm long, linear spathulate, tomentose; pedicels 4-9 mm; sepals subequal, 15-23 mm, lanceolate, attenuate, white-tomentose; corolla 4.5-6 cm long, funnel-shaped, white, pubescent, limb entire to undulate. Capsules 8-10 × 6-8 mm, conical, glabrous; seeds glabrous except for white marginal hairs c. 3 mm long.

Illustration.

Carranza (2007: 69).

Distribution.

Dry spiny xerophytic scrub at 2000-2250 m. Endemic to central Mexico.

MEXICO. Guanajuato: Mun. Cortazar, SE of El Zapote, E. Carranza & R.M. Garcia 5322 (IEB, MEXU, MICH, TEX); cerca de El Zapote, E. Carranza 5348 (IEB). Querétaro: del Ciervo al Cerro de la Mesa, F. Altimirano 1557 (US); SE de La Trinidad, R. Hernández 12059 (IEB); W of El Tejocote, J. Rzedowski 48839 (IEB).

Note.

Resembles Ipomoea durangensis but differs in the white corolla, greyer tomentose indumentum, larger, more imbricate leaves and the longer peduncles.