@article {6901, title = {Natural hybridization in Ipomoea (Convolvulaceae)}, journal = {Amer. J. Bot.}, volume = {60}, year = {1973}, month = {1973///}, pages = {33 - 34}, author = {Abel, W.E. and Austin, D.F.} } @article {dum4638, title = {Cuscuta epilinum (vlaswarkruid) voor het eerst sinds 1938 weer waargenomen in Belgi{\"e}, nu als neofyt}, journal = {Dumortiera}, volume = {101}, year = {2012}, month = {10/2012}, pages = {48-49}, chapter = {48}, url = {http://www.br.fgov.be/DUMORTIERA/DUM_101/Dum\%20101_48-49_Cuscuta_epilinum_Barendse.pdf}, author = {Rutger Barendse} } @article {dum4452, title = {Drie slecht gekende taxa van het genus Calystegia(Convolvulaceae) in Belgi{\"e}}, journal = {Dumortiera}, volume = {100}, year = {2012}, month = {04/2012}, pages = {25-29}, chapter = {25}, abstract = {Three little-known taxa of the genus Calystegia (Convolvulaceae) in Belgium. Recent fieldwork and a thorough herbarium revision have resolved some taxonomic problems within the genus Calystegia in Belgium. The enigmatic and non-native Calystegia silvatica is reliably reported for the first time. It is probably often overlooked and seems well-naturalised locally. Several additional records (including a recent one) are provided for non-native Calystegia pulchra. Finally, we ascribe pink- flowered forms of native Calystegia sepium to subsp. sepium f. colorata. A key for the identification of all Belgian taxa of the genus Calystegia is provided.}, author = {Filip Verloove} }