Convolvulus spinosus Burm.f., Fl. Ind. (N.L. Burman) Prodr. Fl. Cap. 47. 1768. (Burman 1768: 47).

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 : 157

140. Convolvulus spinosus Burm.f., Fl. Ind. (N.L. Burman) Prodr. Fl. Cap. 47. 1768. (Burman 1768: 47). Figure 18, t. 27-33

Convolvulus genistoides Jaub. & Spach, Ill. Pl. Orient. 4: 107. 1852. ( Jaubert and Spach 1852: 107). Type. IRAN, Aucher-Eloy 4933 (holotype P!).

Convolvulus affghanus Vatke, Österr. Bot. Z. 25: 168. 1875. ( Vatke 1875: 168). Type. AFGHANISTAN, Griffith 5857 (holotype W!; isotypes C, GOET, K!).

Type.

IRAN, Garzin s.n. (holotype G).

Description.

Intricately branched spiny undershrub to 60 cm, stems finely adpressed pubescent, branches spinescent and with some stem spines near branch tips formed from old peduncles. Leaves sessile, 0.5-1.2 × 0.3-0.4 cm, oblong to oblanceolate, obtuse, margin entire, base attenuate, adpressed-pubescent. Flowers axillary, usually solitary, sometimes up to 3 in a diachasial cyme; peduncles 4-8 mm, woody, spinescent, bent at apex; bracteoles 1-1.5 mm, scale-like; pedicels c. 1 mm; outer sepals 3 × 2 mm, oblong to elliptic, obtuse and mucronate, convex, pubescent with spreading hairs; inner sepals 4.5-5 × 3 mm, pubescent with spreading hairs; corolla 1.3-1.6 cm long, white, midpetaline bands adpressed pilose; ovary pubescent; style pubescent, divided c. 4 mm above base, stigmas 3 mm; capsule comose; seeds smooth, glabrous. [ Sa’ad 1967: 70; Austin and Ghazanfar 1979: 12; Nowroozi 2002: 27 (plate), 100 (map)]

Distribution.

Iran (Parris 75.477, Faroughi 10731, Ruenemark et al. 22367, Aucher-Eloy 1279); Afghanistan (Breckle 1074); Pakistan: Balochistan (Lamond 1224, Ghafoor & Goodman 4994, Rechinger 28121, 29401). Most common in Balochistan.

Notes.

The inner sepals are noticeably longer than the outer sepals.