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
22.
Convolvulus althaeoides L., Sp. Pl. 156. 1753. (Linnaeus 1753: 156).
Figure 5, t. 23-30
Type.
Southern Europe, (lectotype LINN 218.26!, designated by
Sa'ad
1967
: 210).
Description.
Trailing or twining perennial herb with slender creeping rootstock; stems terete, to 2 m long; vegetative parts thinly pilose to densely sericeous-tomentose. Leaves petiolate, strongly dimorphic; lower leaves 2-4
x
1-3 cm, ovate-deltoid, apex apiculate, acute or obtuse, margin irregularly crenate, base cordate and shortly cuneate; upper leaves slightly larger, to 6
x
6 cm, similar in outline but deeply sinuate-lobed to 3-5-partite with narrowly oblong, entire to coarsely dentate segments; petioles 1-5 cm long. Flowers axillary, pedunculate, solitary or in a dichasial cyme with up to 4 flowers; peduncles 3-10 cm; bracteoles 3-12 mm, filiform, linear to narrowly linear-lanceolate; pedicels 5-13 mm; outer sepals 5-9
x
4-6 mm, variable in shape, elliptic to obovate, acute to obtuse, glabrous to hirsute, margin often scarious, undulate, inner sepals slightly broader with broad scarious margins, often basally auriculate; corolla (1.6-)1.8-4.5 cm long (very variable in size), pink (rarely white), very weakly lobed, midpetaline bands darker, shortly pubescent; filaments glandular below; ovary glabrous; style glabrous, divided 5-10 mm above base; stigmas 2. 5-5 mm, relatively stout. Capsule glabrous; seeds glabrous, obscurely tuberculate. [
Sa'ad
1967
: 210]
Notes.
A very variable species in indumentum, sepal form and flower size, this reflected in the extensive synonymy below. Two subspecies, sometimes treated as separate species, can usually be distinguished although intermediates occur occasionally, for example
Fitz
74/1978 (W) from Tunisia,
Dubuis
8549 (BM) from Algeria,
Pampanini 3729
(FI), the type of
var. angustisectus
from Libya or
Faure
s.n. (MPU) the type of
var. dissectus
, from Algeria, all of which have the distinct linear leaf lobes of
subsp. tenuissimus
without the softly sericeous indumentum.