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 107. Convolvulus semhaensis (R.R.Mill) J.A.Luna & Carine, Phytotaxa 156(1): 51. 2014. (Luna et al. 2014). Seddera semhaensis R.R.Mill, Kew Bull. 64: 231. 2009. (Sebsebe et al. 2009: 231). Type. SOCOTRA, Semha Island, Miller 11461A (holotype E, not seen). Type. Based on Seddera semhaensis R.R.Mill Description. Grey undershrub to 50 cm, branches straight and rigid, densely grey canescent when young, becoming more sparsely hirsute with age and reddish-brown in colour. Leaves shortly petiolate, 2.5-8 x 0.5-1.5 mm, narrowly lanceolate, subacute, cuneate at base, densely grey-sericeous; petioles 0.5-1 mm. Flowers solitary, axillary, subsessile; peduncle absent; bracteoles 4-5 x 1.5 mm, narrowly oblong-elliptic, densely pilose; pedicels 0.5 mm; outer sepals 6-6.5 x 1.5 mm, oblong, acuminate; inner sepals shorter, scarious; corolla 7-8.5 mm long, white faintly flushed pink, midpetaline bands long-sericeous to base; filaments glandular at base; ovary pilose; style divided 4 mm above base, stigmas 0.75 mm, obovoid. Capsule pilose at apex; seeds glabrous. Distribution. Endemic to Semha Island in the Socotra islands of Yemen. Notes. Miller 12511, the only specimen we have seen of this species, has a glabrous ovary and style.The sepals are shorter and narrower than in Convolvulus kossmatii but the differences are not very great. These two species are very close and may prove to be conspecific.