TY - JOUR T1 - A taxonomic revision of non-native Cenchrus s.str. (Paniceae, Poaceae) in the Mediterranean area JF - Willdenowia Y1 - 2012 DO - http://dx.doi.org/10.3372/wi.42.42107 A1 - Filip Verloove A1 - Enrique Sánchez Gullón SP - 67 EP - 75 KW - GRAMINEAE; CENCHRUS ECHINATUS; CENCHRUS LONGISPINUS; CENCHRUS SPINIFEX; TAXONOMY; CHOROLOGY AB - The exact identity of non-native, naturalised populations of Cenchrus s.str. in the Mediterranean area has been critically assessed. A herbarium revision confirmed the presence of three species: Cenchrus echinatus, C. longispinus and C. spinifex (syn.: C. incertus). In the present paper C. echinatus is reported for the first time from Spain and confirmed for Egypt and Israel. C. longispinus, up to present widely confused with C. spinifex, is reported for the first time from Croatia, Greece, Israel and Morocco and furthermore confirmed for France (including Corse) and Italy. Finally, C. spinifex is confirmed for France, Italy and Spain, while records from Greece and Israel proved to be in error for C. longispinus. All three species are much alike and widely confused in the studied area. In some areas (especially in parts of Italy and Israel) two species occur sympatrically, which largely added to the confusion. Main features for their distinction are discussed and a dichotomous key for the identification of the native and non-native species of Cenchrus s.str. in the Mediterranean area is presented. VL - 41 SN - 0511-9618 UR - http://www.ingentaconnect.com/content/bgbm/will/2012/00000042/00000001/art00007 IS - 1 ER - TY - JOUR T1 - Verbena incompta (Verbenaceae), an overlooked xenophyte in Europe JF - Willdenowia Y1 - 2011 DO - 10.3372/wi.41.41104 A1 - Filip Verloove SP - 43 EP - 49 KW - Italy KW - Spain KW - taxonomy KW - Verbena ser. Pachystachyae VL - 41 ER - TY - JOUR T1 - Juncus dichotomus (Juncaceae) in northwestern Italy, a xenophyte new to Europe JF - Willdenowia Y1 - 2010 DO - doi:10.3372/wi.40.40202 A1 - Filip Verloove SP - 173 EP - 177 AB - Juncus dichotomus, a native of the Americas, is reported for the first time from Europe. It is more or less widely naturalised in northwestern Italy (provinces of Biella, Novara, Torino and Vercelli) and probably largely overlooked elsewhere as a result of confusion with J. tenuis. Diagnostic features of both species (and other members of the J. tenuis group currently found in Europe, viz. J. anthelatus and J. dudleyi) are critically assessed and an identification key is presented. Taxonomy and nomenclature of J. dichotomus are discussed, especially with regard to the status of J. platyphyllus, and notes on its present distribution in Italy and its ecology are provided. Like J. tenuis, it often grows in valuable natural and seminatural habitats and locally seems to behave like an invasive environmental weed. VL - 40 JO - Juncus dichotomus new to Europe ER - TY - JOUR T1 - Studies in the genus Paspalum (Paniceae, Poaceae) in Europe – 2. The Quadrifaria group JF - Willdenowia Y1 - 2007 A1 - Filip Verloove A1 - Marc Reynders SP - 423 EP - 430 KW - distribution. KW - Italy KW - Paspalum exaltatum KW - Paspalum quadrifarium KW - taxonomy KW - xenophyte AB - The South American Paspalum quadrifarium has been reported as a naturalized xenophyte in Tuscany and Liguria, Italy, since at least the 1960s. In the present contribution the discovery of the closely related P. exaltatum, also of South American origin, in Liguria, Italy, is reported. These are the only known occurrences in Europe of both species, which are very similar to each other and likely to be confused. In the present paper their diagnostic features are discussed and original line drawings and SEM photographs for both taxa are presented. Their current distribution in Italy is shown and some ecological remarks are added. VL - 37 ER -