Convolvulus leiocalycinus var. retrosepalus ( Sa'ad ) J.R.I.Wood & R.W.Scotland, 2015

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 105-106

70b. Convolvulus leiocalycinus var. retrosepalus ( Sa'ad) J.R.I.Wood & R.W.Scotland stat. nov. Figure 10, t. 9-14

Convolvulus retrosepalus Sa’ad, Meded. Bot. Mus. Herb. Rijks Univ. Utrecht 281: 69. 1967. ( Sa’ad 1967: 69).

Type.

AFGHANISTAN, Lindberg 317 (holotype W!).

Distinguishing features.

This differs from var. leiocalycinus by the narrowly lanceolate, reflexed sepals, c. 7 × 1 mm, the veins usually conspicuous. The leaves and ovary are glabrous.

Distribution.

Restricted to Afghanistan, Farah Province (Hedge & Ekberg 7252, Hedge et al. 7739, Grey-Wilson & Hewer 557, Carter 824).

Note.

Intermediates with var. leiocalycinus occur quite frequently (Grey-Wilson & Hewer 534, Podlech 21729, Rechinger 33380, Koie 4414). These are similar to var. retrosepalus in their lack of hairs but the sepals are obovate and spreading.