Convolvulus subsericeus Schrenk, Enum. Pl. Nov. [F.E.L. Fischer & C.A. Meyer] 1: 19. 1841. (Fischer and Meyer 1841: 19).

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 : 145

122. Convolvulus subsericeus Schrenk, Enum. Pl. Nov. [F.E.L. Fischer & C.A. Meyer] 1: 19. 1841. (Fischer and Meyer 1841: 19).

Convolvulus cantabrica subsp. subsericeus (Schrenk) Choisy, Prodr. [A.P. de Candolle] 9: 402. 1845. ( Choisy 1845: 402). Type. Based on Convolvulus subsericeus Schrenk

Convolvulus neglectus Palib., Russk. Bot. Zhurn. 1913(3): 24. 1915. ( Palibine 1915: 24). Type. “TURKESTAN”, various collections cited (LE).

Type.

KAZAKHSTAN, Balkash, Schrenk s.n. (lectotype LE!, sheet annotated “Typus” by Grigoriev, designated here; isolectotypes BM001035795!, K!, LE!, OXF!, W!).

Description.

Branched (often divaricately) undershrub to at least 50 cm, stems sericeous to adpressed puberulent, somewhat zigzag, branches arising at an acute angle. Basal leaves unknown, stem leaves sessile, 1-3 × 0.1-0.3 cm, linear-lanceolate, acute, entire, base cuneate, sericeous, Flowers up to 3 in pedunculate, cymes but commonly reduced to solitary flowers; peduncles 2.5-6 cm, characteristically long and slender, often bent at transition to pedicel; bracteoles 2 × 0.5 cm, deltoid-lanceolate, caducous; pedicels very short, 1-2 mm; sepals 5-7 × 2 mm, narrowly ovate, shortly acuminate, pubescent; corolla 1.1-1.5 cm, white, shallowly lobed, the midpetaline bands, pilose, terminating in teeth; ovary pilose; style glabrous, divided c. 5 mm above base, stigmas 2 mm. capsule pilose at apex; seeds pubescent.

Distribution.

Kazakhstan (Karolin & Kiriloff 1720, Sokolov s.n. [11/6/1908], Schipczinsky 305, Dubiansky & Basilevskaja s.n. [9/8/1927], Chaffanjon 660). Apparently rare and limited to sandy desert in the area around Lake Balkash.

Notes.

Convolvulus subsericeus is sometimes confused with Convolvulus divaricatus from which it is distinguished by the subsericeous stems, the narrow, linear-lanceolate stem leaves and the long slender branches branches arising at an acute angle.