Convolvulus dregeanus Choisy, Prodr. [A.P. de Candolle] 9: 411. 1845. (Choisy 1845: 411).

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 : 71-72

28. Convolvulus dregeanus Choisy, Prodr. [A.P. de Candolle] 9: 411. 1845. (Choisy 1845: 411). Figure 6, t. 23-31

Convolvulus liniformis Rendle, J. Bot. 39: 61. 1901. ( Rendle 1901: 61). Type. SOUTH AFRICA, Zeyher 1220 (lectotype BM000930471!, designated here; isolectotype P!).

Type.

SOUTH AFRICA, Northern Cape, Drège 7828 (holotype G; isotypes BM!, L, P!).

Description.

Completely glabrous perennial herb with decumbent to ascending stems to 30 cm long from a central taproot. Leaves shortly petiolate, 1-2 (-3) cm long, very variable in form on the same plant and between plants, sometimes linear with a hastate base and minute auricles (Zeyher 1220), more commonly dimorphic, the basal leaves ovate, weakly cordate and apically obtuse with coarsely serrate margins, becoming pinnatifid upwards, the upper leaves 5-fid with a long, linear central lobe and shorter basal lobes ( Drège 7828); petioles 1-5 mm (shorter in linear-leaved plants). Flowers solitary, pedunculate; peduncles 0.5-3 cm long, pedicels 1- 5 mm, bracteoles 1-2 mm, linear-lanceolate to spathulate; outer sepals 4-5.5(-7) × 2.5-3 mm, obovate, rounded, rounded and mucronate or fimbriate; corolla 1-1.4 (-2) cm, white to pale pink, midpetalline bands glabrous; ovary glabrous; style glabrous, divided 6-9 mm above base, stigmas 1.5 mm, slightly widened upwards. Capsule glabrous; seeds glabrous, rugose. [ Meeuse 1958: 671; Meeuse and Welman 2000: 41 (map)]

Distribution.

South Africa except KwaZulu-Natal (Gemmell 4976, Acocks 20833, Hutchinson 3100, Verdoorn 899), Lesotho (Christol s.n. [1907-8]).

Notes.

Distinct for being completely glabrous with small, delicate leaves and short obovate, rounded to slightly fimbriate sepals.