Convolvulus calvertii Boiss., Diagn. Pl. Orient., ser. 2, 3: 124. 1856. (Boissier 1856: 124).

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 : 162

151. Convolvulus calvertii Boiss., Diagn. Pl. Orient., ser. 2, 3: 124. 1856. (Boissier 1856: 124).

Type.

TURKEY, Calvert & Zohrab 1282 (holotype G; isotypes E!, OXF!).

Description.

Variable woody based perennial with thick woody taproot, sometimes cushion-forming, with several ascending stems in a loose tuft to c. 20 cm in height, stems and all vegetative parts with long spreading hairs. Basal leaves 4-8 × 0.3-0.8 cm, oblong or oblanceolate, acute, entire, narrowed to a long petiole-like base; stem leaves sessile, 3-5 × 0.6-0.9 cm, oblong-elliptic, acute, entire, cuneate at the base. Flowers in many-flowered terminal heads, occasionally also 1-2 flowers in the axil of the uppermost leaf; bracts 1.3-3 × 0.1-0.6 cm, linear-oblong or lanceolate, acute, pilose; bracteoles 11-16 × 0.5-1 mm, linear, pilose; pedicels 0-3 mm; outer sepals 6-10 × 1.5-2 mm, lanceolate, long acuminate, pilose; inner sepals abruptly narrowed around the middle with a caudate apex; corolla 1.5-2 cm, white or pink, not lobed, midpetaline bands pilose, darker; ovary pilose; style pilose, divided c. 3 mm above base, stigmas 3-5 mm. Capsule pilose; seeds pubescent. [ Sa’ad 1967: 114]

Notes.

We recognise two subspecies: