Dipsacus strigosus Willd. ex Roem. et Schult. (syn.: Virga strigosa (Willd. ex Roem. et Schult.) Holub) (Russia, Ukraine) – An exceptional alien but possibly overlooked. A small but apparently well-established population was discovered in 2012 in the Koning Boudewijnpark in Jette (Brussel). For additional information, see: http://alienplantsbelgium.be/content/dipsacus-strigosus-found-belgium-and-possibly-overlooked. By now it turned out to be recorded already in 2010 (http://waarnemingen.be/waarneming/view/48969122). In 2013 also seen (a single plant) on the verge of a railway yard in Gent (Sint-Pieters).
Dipsacus strigosus is widely naturalised in several parts of Europe (see for instance Poelt 1970, Leslie 1980, Helfrich & Lohwasser 1990, Walter 2004, Ahrens 2007, Ahrens 2008, …), much increasing lately and possibly overlooked in Belgium. It is a look-alike of native Dipsacus pilosus with larger heads (30-40 mm versus 15-25 mm) and pale yellow corollas (versus whitish corollas). Especially records of Dipsacus pilosus from unusual habitats (wasteland, …) or disjunct areas are possibly suspect and require further investigation.
|
|
 |
Selected literature:
Ahrens W. (2007) Zur Unterscheidung von Dipsacus pilosus L. und Dipsacus strigosus Willdenow ex Roemer et Schultes. Mitt. Florist. Kart. Sachsen-Anhalt 12: 71-75.
Ahrens W. (2008) Dipsacus strigosus Willdenow ex Roemer et Schultes 1818. Eine neue Sippe in Niedersachsen. Braunschw. Geobot. Arb. 9: 21-41. [available online at: http://rzbl04.biblio.etc.tu-bs.de:8080/docportal/servlets/MCRFileNodeServlet/DocPortal_derivate_00012649/Ahrens_Dipsacus_strigosus.pdf]
Helfrich T. & Lohwasser W. (1990) Zur Verbreitung der Behaarten Karde (Dipsacus pilosus L.) und der Schlanken Karde (Dipsacus strigosus Willd. ex Roemer et Schultes) in Oberfranken. Ber. Naturforsch. Ges. Bamberg 65: 25-61.
Leslie A.C. (1980) Further records of Dipsacus strigosus Willd. in Cambridgeshire. Watsonia 13: 126-128.
Poelt J. (1970) Dipsacus pilosus und sein verkannter Doppelgänger Dipsacus strigosus in Südbayern. Ber. Bayer. Bot. Ges. 42: 203-206.
Walter E. (2004) Über die Ausbreitung der schlanken Karde (Dipsacus strigosus Willd. ex Roemer et Schultes) in Oberfranken. Flor. Rundbr. 38(1-2): 81-86.