A foundation monograph of Convolvulus L. (Convolvulaceae) Author Wood, John R. I. Department of Plant Sciences, South Parks Road, University of Oxford, OX 1 3 RB, UK & Honorary Research Associate, Royal Botanic Gardens, Kew Author Williams, Bethany R. M. Department of Plant Sciences, South Parks Road, University of Oxford, OX 1 3 RB, UK & Department of Life Sciences, Natural History Museum, Cromwell Road, London SW 7 5 BD, UK Author Mitchell, Thomas C. Plant Biodiversity Research, Technische Universitaet Muenchen, Maximus-von-Imhof Forum 2, 85354 Freising, Germany Author Carine, Mark A. Department of Life Sciences, Natural History Museum, Cromwell Road, London SW 7 5 BD, UK Author Harris, David J. https://orcid.org/0000-0002-6801-2484 Royal Botanic Garden Edinburgh, 20 A Inverleith Row, Edinburgh EH 3 5 LR, UK Author Scotland, Robert W. Department of Plant Sciences, South Parks Road, University of Oxford, OX 1 3 RB, UK robert.scotland@plants.ox.ac.uk text PhytoKeys 2015 2015-06-18 51 1 282 http://dx.doi.org/10.3897/phytokeys.51.7104 journal article http://dx.doi.org/10.3897/phytokeys.51.7104 1314-2003-51-1 E76E3938E216FF804849B803C469FE14 576310 13 . Convolvulus cassius Sam. ex Rech.f., Ark. Bot., a.s., 1: 314. 1950. (Rechinger 1950: 314). Figure 4, t. 10-16. Type . SYRIA, Dinsmore 10127 (holotype S; isotype K!). Description. Twining perennial herb, stems angled, glabrous. Leaves petiolate, 3-4 x 2-2.5 cm, ovate-deltoid, obtuse, margin undulate to crenate or weakly lobed, ciliate, base cordate and attenuate onto the petiole, beneath thinly pubescent. Flowers 1-3 in pedunculate axillary cymes; peduncles 4-14 cm, glabrous; bracteoles linear, acute, 6-8 x 1 mm, ciliate; pedicels 0.8-1 cm, thinly pilose with stiff spreading hairs; outer sepals 9-10 x 5-6 mm, oblong-obovate, slightly pandurate, abruptly constricted at apex into a mucro, the apical portion dark-coloured, pilose with stiff brown hairs; inner sepals glabrous, membranous; corolla 3.2 cm, yellow, unlobed, midpetaline bands thinly pilose towards the apex; filaments glandular below; ovary pilose; style thinly pilose, divided 5 mm above the base; stigmas 2 mm. Capsule and seeds not seen. [ Sa'ad 1967 : 222] Distribution. A rare and very local species of the Syrian border with Turkey, known from a handful of collections: Turkey (?); Syria ( "Latakia" fide Parris 1978 : 216; Samuelson 5265). Notes. Resembling Convolvulus betonicifolius and similar species but leaves glabrous except for the ciliate margins, which are crenate up to the apex.