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 136. Convolvulus tragacanthoides Turcz., Bull. Soc. Imp. Naturalistes Moscou 5: 201. 1832. (Turczaninow 1832: 201). Figure 18, t. 10-15 Type . MONGOLIA, Tzagan-Balgassu, Turczaninow s.n. (holotype KW!). Description. Low grey-sericeous undershrub with woody rootstock, often more or less cushion-forming; branches short, woody, spinescent when old. Leaves sessile, 1-2.8 x 0.1-0.3 cm, linear to narrowly linear-oblanceolate, obtuse, entire, tapering at the base. Flowers in clusters of 1-4 in the axils of the leaves towards the tips of the branches; peduncles absent; bracteoles c. 2 mm long, filiform or linear; pedicels 1-2 mm; outer sepals 4-6 x 3.5 mm, obovate, rounded to truncate and slightly fimbriate, pilose abaxially; inner sepals broader, 4-4.5 mm wide, glabrous to thinly pilose; corolla 1.5-2.5 cm long, pink, unlobed, midpetaline bands pubescent; ovary pilose; style thinly pilose, divided c. 4.5 mm above base, stigmas c. 3 mm. Capsule pubescent; seeds glabrous. [ Sa'ad 1967 : 77] Figure 18. 1-9 Convolvulus fruticosus 1 shoot showing bract (leaf) and flower 2 bracteole 3 outer sepals (two forms) 4 middle sepal 5 inner sepal 6 stamen 7 ovary and style 8 capsule 9 seed 1 from Borissova 3768a (C) 2-7 from Paulson 303 (C) 8-9 from Rechinger 5502 (W) 10-15 Convolvulus tragacanthoides 10 shoot showing spines 11 leaf 12 outer sepal 13 inner sepal 14 stamen 15 ovary and style. From Cowdry 1382 (K) 16-20 Convolvulus spinifer 16 bract (leaf) 17 outer sepal 18 middle sepal 19 inner sepal 20 ovary and style. From Regel s.n. (W) 21-26 Convolvulus gortschakovii 21 leaf 22 outer sepal 23 middle sepal 24 inner sepal 25 stamen 26 ovary and style. From Karelin & Kiriloff 326 (K) 27-33 Convolvulus spinosus 27, 28 leaves 29 outer sepal 30 middle sepal 31 inner sepal 32 stamen 33 ovary and style. From Griffith 5857 (GOET) 34-41 Convolvulus argyracanthus 34, 35 leaves 36 bracteole 37 outer sepal 38 middle sepal 39 inner sepal 40 stamen 41 ovary and style 34-36 From Rechinger et al. 3228 (W) 37-41 from Rechinger et al. 3234 (W). Distribution. Widespread in central Asia: China ( Chung 127, Wilson 288, Farrer & Purdom 99, Bodinier s.n., Popov 133); Mongolia ( Pipe-Wolferstan & Phillips 37, Petrov s.n. [10/6/1958], David 2641); Kyrgyzstan ( Botchantsov s.n. [29/7/1974], Minkwitz 506); Uzbekistan ( Kamelin 36, Ismatova 233). Notes. Convolvulus tragacanthoides has the appearance of a spiny Convolvulus ammannii , with which it is sometimes confused, but flowers sessile and clustered.