Convolvulus lanjouwii Sa'ad , Meded. Bot. Mus. Herb. Rijks Univ. Utrecht 281: 232. 1967. ( Sa'ad 1967: 232).

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 : 107-108

74. Convolvulus lanjouwii Sa'ad, Meded. Bot. Mus. Herb. Rijks Univ. Utrecht 281: 232. 1967. ( Sa'ad 1967: 232). Figure 10, t. 37-45

Type.

AFGHANISTAN, Griffith 678/K.D. 5872 (holotype K!; isotype P!).

Description.

Trailing or scrambling herb, probably branched at base with stems to at least 40 cm, all vegetative parts densely pubescent to tomentose. Leaves petiolate, 2.2-3.5 × 0.7-1.5 cm, ovate-deltoid, apex acute, margin entire, base truncate; petioles 4-5 mm. Flowers up to 3 in pedunculate, axillary cymes, but often reduced to 1-2; peduncles 2.5-5 cm; bracteoles 2-3 mm, linear-lanceolate; pedicels 3-6 mm; outer sepals 9-10 × 4-4.5 mm, broadly oblong-rectangular, obtuse to truncate and mucronate, inner sepals scarious-margined and subglabrous; corolla 2.5-2.7 cm, colour unknown, unlobed, midpetaline bands thin, pilose; filaments glandular near base; ovary glabrous; style glabrous, divided c. 6 mm above base, stigmas 2 mm, relatively stout. Capsule glabrous, seeds minutely hirsute.

Distribution.

Afghanistan-only known from the type collected at "Seh Baba".

Notes.

This species and Convolvulus rectangularis have unique, distinct, broadly oblong-rectangular sepals.