Chamaenerion dodonaei (Vill.) Schur (syn.: Epilobium dodonaei Vill., E. rosmarinifolium Haenke, Chamerion dodonaei (Vill.) Holub) (C- and SE-Eur., SW-As.) – A very rare but apparently slightly increasing, locally naturalized alien. Discovered in 1992 in a small, abandoned chalk pit in Jemelle near Rochefort. This population appears to be well-established (+ 100 plants by 2008) but slightly decreased lately as a result of renewed industrial activities. Jacob & Remacle (2001) subsequently added two new localities: a small but stable population on rough ground (steel scrap) in Aubange (since 1998) and a second locality in Jemelle (near an industrial plant, about 600 m away from the known locality). In Aubange Chamaenerion dodonaei was still present in 2012 (comm. A. Remacle) but does not seem to expand. In Jemelle, on the contrary, this new population very likely originated from the oldest known Belgian population and seems to indicate a slight, local expansion. Moreover, in 2011 a third population was discovered in the very same area (http://waarnemingen.be/waarneming/view/55289051).
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Selected literature:
Bailly L. & Gosseries A. (1995) Epilobium dodonaei récemment découvert à Jemelle (Rochefort, province de Namur, Belgique): une espèce en expansion vers le nord-ouest, nouvelle pour la flore belge. Nat. Mosana 48(1): 8-13.
Horák J. & Horák J. (1978) Výskyt vrbky rozmarýnolisté - Chamerion dodonaei (Vill.) Holub v Podkrkonoší. (Occurrence of Chamerion dodonaei (Vill.) Holub in the foothills of the Krkonose Mts.) Zpravy Česk. Bot. Spol. CSAV 13(3): 179-181.
Jacob J.-P. & Remacle A. (2001) Epilobium dodonaei Villars en Belgique. Nat. Mosana 54: 1-12.
Klemm G. (2010) Zwei Neuankömmlinge in Brandenburg (Epilobium brachycarpum, E. dodonaei). Verhandlungen des Botanischen Vereins von Berlin und Brandenburg. 143: 243-246.
Remacle A. (2009) Contribution des anciennes carrières à la biodiversité wallonne. Convention "Les carrières en Région wallonne: inventaire et intérêt biologique" (C45). Service public de Wallonie, Direction générale opérationnelle de l'Agriculture, des Ressources naturelles et de l'Environnement, Direction de la Nature, rapport non publié, 129 pages.
Slavík B. (1978) Epilobio dodonaei-Melilotetum albi, eine neue Pflanzenassoziation. Folia Geobot. Phytotax. 13: 381-395.
Slavík B. (1986) Epilobium dodonaei Vill. in der Tschechoslowakei. Preslia 58(4): 307-338.
Theurillat J.P. (1979) Etude biosystématique d'Epilobium dodonaei Vill. et d'E. fleischeri Hochst. (Onagraceae). Bull. Soc. Neuchâtel. Sci. Nat. 102: 105-128.