Hedera pastuchovii G. Voronov
As remarked above under H. helix, the common ivy in its eastern forms seems to have leaves less lobed than in the west. The present species, a native of the Caucasus and the Caspian forests of the USSR and Iran, also has obscurely lobed leaves, but these differ from H. helix in their more elongate shape and are also sometimes slightly toothed, as in some forms of H. nepalensis.
Other species in the genus
Some names used by Bean have now been superseded and are no longer familiar. To ensure that all plants can be easily found, under any name, we have cross-referenced to The Plant List, a collaboration between RBG Kew, Missouri Botanical Gardens and other organisations, which aims to provide a currently accepted name for any plant. Not all taxonomists will agree with all Plant List nomenclature, but it provides a baseline to compare names. For each species above, clicking on the Modern Name will link to the entry for that name on The Plant List website.