Convolvulus sericocephalus Juz., Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk. S.S.S.R. 12: 219. 1950. (Juzepczuk 1950: 219).

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 : 164

152. Convolvulus sericocephalus Juz., Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk. S.S.S.R. 12: 219. 1950. (Juzepczuk 1950: 219). Figure 20, t. 1-7

Type.

CRIMEA, Yanata & Doych 27/5/1913 (lectotype LE, designated here).

Description.

Perennial herb with leaves arranged in a basal rosette, from which arise erect stems 30-40 cm high; stems adpressed pilose. Leaves sessile, mostly basal, 2-5 × 0.3-0. 5 cm, linear to oblanceolate, acute, tapered at the base to a pseudopetiole, adpressed pilose to subsericeous. Flowers congested at the top of the stem forming a headlike inflorescence with a single head arising from the uppermost leaf axil; bracts resembling linear-lanceolate reduced leaves, erect, slightly exceeding the inflorescence; peduncles of lateral capitula 2-22 mm, bracteoles filiform, pedicels 0-3 mm, sepals 14-15 × 5-6 mm, obovate, strongly cuspidate, adpressed pubescent and with a few spreading hairs, the inner sepals smaller; corolla 1.8-2 cm long, pink, midpetaline bands pilose; ovary hirsute; style pilose, divided 5 mm above the base; stigmas 4 mm. Capsule not seen.

Distribution.

Crimea (Lindemann s.n.).

Notes.

This species appears to be almost certainly the hybrid between Convolvulus holosericeus and Convolvulus calvertii , resembling the former in habit, leaf shape and indumentum but the latter in the presence of some spreading hairs on the sepals and the less saccate calyx. Unlike Convolvulus calvertii the sparse indumentum makes the sepals clearly visible.

Juzepczuk (1950) did not indicate type specimens for Convolvulus sericocephalus and a lectotype was incorrectly proposed by Smolyaninonova (1981) with the location as "Zapadnaya storona Fyeodosiskovo shosse" but without specimen citation. This appears to refer to Yanata & Doych s.n. [27/5/1913], designated as lectotype above and, incidentally, the only specimen of this taxon seen by Sa’ad. Sa’ad’s citation of Juzepczuk s.n. as the type is an inexplicable error as Juzepczuk does not cite any of his own collections.