Convolvulus krauseanus Regel & Schmahl., Trudy Imp. S.-Peterburgsk. Bot. Sada 6: 339. 1879. (Regel 1879: 339).

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 : 153-154

135. Convolvulus krauseanus Regel & Schmahl., Trudy Imp. S.-Peterburgsk. Bot. Sada 6: 339. 1879. (Regel 1879: 339).

Type.

"near Tashkent", Krause s.n. (syntypes LE!, 2 sheets).

Description.

Densely grey canescent undershrub with thick woody base, up to 1.5 cm in diameter, from which arise numerous, erect, straight, rigid but not spinescent woody stems to 40 cm, these near leafless upwards and somewhat scape-like. Leaves mostly on lower part of stem, numerous, sessile, 5-25 × 0.5 mm, linear to very narrowly linear-oblanceolate, obtuse. Flowers subsessile, 1-5 grouped at the apex of the stem, sometimes with a single flower on the stem below the apical cluster; bracts and peduncles absent; bracteoles 1-2 mm, linear-lanceolate, obtuse; pedicels 1-2 mm; sepals 4-6 × 2.5-3 mm, broadly ovate to suborbiculate, shortly apiculate, margins scarious, densely silky-pubescent; corolla 1.3-1.5 cm long, white, unlobed but with pilose border, midpetaline bands densely pilose, terminating in teeth; ovary densely pilose; style pilose, divided c. 8 mm above base; stigmas 3 mm. Capsule pilose apically. [ Petrov 1935: 139 (plate)]

Distribution.

Endemic to Kyrgyzstan (Knorring & Minkwitz s.n. [24/7/1924], Gudenov s.n. [19/8/1958], Botchantsov 78, Kamelin et al. 9090, Lazkov s.n. [4/5/2005]).

Notes.

Very distinct because of the dense grey-canescent indumentum, the plentiful linear leaves and the long, scape-like stem with subsessile flowers at or near the apex

The cited type locality is thought to be an error as this species has never subsequently been found near Tashkent (Uzbekistan).