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
102
.
Convolvulus oppositifolius Alfarhan, Bot. J. Linn. Soc. 106: 259. 1991. (Alfarhan 1991: 259).
Figure 14, t. 1-7
Type.
OMAN,
Gallagher
6763/2 (holotype E00285430!).
Description.
Low undershrub from a woody base reaching c. 30 cm; stems densely tomentellous with white, spreading hairs, becoming stiff and rather woody when old and said to form a candelabra-shaped plant. Leaves alternate below but mostly opposite upwards, subsessile, 5-13
x
2-5 mm, elliptic or oblong-elliptic, apex acute to rounded, margin entire, base cuneate to truncate, glandular and hirsute with short spreading hairs on both surfaces; petioles 0-1 mm. Flowers 1-2 in small sessile, axillary clusters near the branch tips; peduncles and pedicels absent or nearly so; bracteoles 6
x
2 mm, oblong, acute; outer sepals 7-8
x
1.8-2 mm, lanceolate, acute, green near apex but membranous below, sericeous; inner sepals narrower (1.5-1.8 mm wide) with membranous margin; corolla 11-13 mm long, pinkish or "pale blue", midpetaline bands villous; ovary glabrous; style glabrous, divided c. 6 mm above base, stigmas short, clavate. Capsule glabrous, seeds minutely rugulose.
Distribution.
Endemic to Oman (
Miller
6492;
Miller & Nyberg
9462,
McLeish
3263;
Hughes & Gallagher
7895/15,
Popov
68/35, 68/46).
Notes.
Very distinct because of the short clavate stigmas and small, tomentose leaves arranged oppositely towards the branch tips. Some plants have very reduced leaves giving the plant a somewhat different facies (e.g.,
Popov
68/23, BM) and have been confused with
Convolvulus hystrix
.