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 104c. Convolvulus hystrix subsp. inermis (Chiov.) J.R.I.Wood & R.W.Scotland stat. nov. Convolvulus hystrix forma inermis Chiov., Fl. Somala 1: 230. 1929. ( Chiovenda 1929 : 230). Type. SOMALIA, Nogol, Puccioni & Stefanini 942 (holotype FT!). Type. Based on Convolvulus hystrix forma inermis Chiov. Distinguishing features. Plant virtually unarmed, the side branches long, relatively slender, spinescent when old, short lateral branchlets absent or, when present, neither rigid nor spine-like. Indumentum and flower heads similar to subsp. hystrix . Distribution. Bari and Nogol regions of NE Somalia ( Hansen & Heemstra 6297, Becket 687, Nugent 33, Hemming 1866). Notes. Occasional specimens intermediate with subspecies hystrix are known from the same region ( Lavranos & Carter 24645, Bally & Melville 15450). Two other specimens from NE Somalia ( Beckett 42, Thulin et al . 9488) are close to both Convolvulus hystrix subsp. inermis and Convolvulus scopulatus . They are similar in habit to both species but the stems and leaves are sericeous, the leaves oblong-lanceolate and the bracteoles similar to the leaves but acuminate to a fine point. They may represent an undescribed species or a form of Convolvulus hystrix or Convolvulus scopulatus .