A global revision of Convolvulus L. is presented, Calystegia R.Br. being excluded on pragmatic grounds. One hundred and ninety species are recognised with the greatest diversity in the Irano-Turanian region. All recognised species are described and the majority are illustrated. Distribution details, keys to species identification and taxonomic notes are provided. Four new species, Convolvulus
austroafricanus J.R.I.Wood & R.W.Scotland, sp. nov., Convolvulus
iranicus J.R.I.Wood & R.W.Scotland, sp. nov., Convolvulus
peninsularis J.R.I.Wood & R.W.Scotland, sp. nov. and Convolvulus
xanthopotamicus J.R.I.Wood & R.W.Scotland, sp. nov., one new subspecies Convolvulus
chinensis
subsp.
triangularis J.R.I.Wood & R.W.Scotland, subsp. nov., and two new varieties Convolvulus
equitans
var.
lindheimeri J.R.I.Wood & R.W.Scotland, var. nov., Convolvulus
glomeratus
var.
sachalitarum J.R.I.Wood & R.W.Scotland, var. nov. are described. Convolvulus
incisodentatus J.R.I.Wood & R.W.Scotland, nom. nov., is provided as a replacement name for the illegitimate Convolvulus
incisus Choisy. Several species treated as synonyms of other species in recent publications are reinstated including Convolvulus
chinensis Ker-Gawl., Convolvulus
spinifer M.Popov., Convolvulus
randii Rendle and Convolvulus
aschersonii Engl. Ten taxa are given new status and recognised at new ranks: Convolvulus
namaquensis (Schltr. ex. A.Meeuse) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
hermanniae
subsp.
erosus (Desr.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
crenatifolius
subsp.
montevidensis (Spreng.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
fruticulosus
subsp.
glandulosus (Webb) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
capituliferus
subsp.
foliaceus (Verdc.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
hystrix
subsp.
ruspolii (Dammer ex Hallier f.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
hystrix
subsp.
inermis (Chiov.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
rottlerianus
subsp.
stocksii (Boiss.) J.R.I.Wood & R.W.Scotland, comb. et stat. nov., Convolvulus
calvertii
subsp.
ruprechtii (Boiss.) J.R.I.Wood & R.W.Scotland, stat. nov., Convolvulus
cephalopodus
subsp.
bushiricus (Bornm.) J.R.I.Wood & R.W.Scotland, stat. nov. The status of various infraspecific taxa is clarified and numerous taxa are lectotypified. This account represents a new initiative in terms of taxonomic monography, being an attempt to bring together the global approach of the traditional monograph with the more pragmatic and identification-focussed approach of most current floras while at the same time being informed by insights from molecular systematics.