Lonicera sempervirens L. (U.S.A.) – A very rare escape from cultivation. Recorded on rocks in 1952 in Vierves (sub Lonicera xbrownii (Regel) Carr.) and on waste land in Bois-de-Breux (Liège) in 1953 (as L. etrusca Santi). With its united upper pair of leaves Lonicera sempervirens superficially resembles L. caprifolium and might pass unrecorded. However, it is much rarer in cultivation. From Lonicera caprifolium (and L. etrusca) it is distinguished in having a corolla with five short lobes (not deeply two-lipped). Lonicera xbrownii (a putative hybrid of L. sempervirens and L. hirsuta Eaton) is very similar but has a glandular hairy corolla, a feature of L. hirsuta.
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