TY - JOUR T1 - Cyperus eragrostis (Cyperaceae): historiek en huidige status in België JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 7 EP - 11 AB - Cyperus eragrostis (Cyperaceae): history and current status in Belgium. Cyperus eragrostis Lam., once a rare South American ephemeral alien in Belgium, seems to have recently become naturalised. After recurring records of, often, long-persisting individuals (especially from the 199O's onwards), a large and apparently naturalised colony was discovered in 2002 in Evergem, north of Ghent (province of East-Flanders). The species' history in Belgium is drawn and special attention is paid to recent records. Ecological data (incl. a phytosociological relevé) and original illustrations, based on herbarium specimens, are included. VL - 89 ER - TY - JOUR T1 - Twee nieuwe stadsgrassen in België: Bromus madritensis en Polypogon viridis JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 24 EP - 26 VL - 90 ER - TY - JOUR T1 - Catalogue of Neophytes in Belgium (1800-2005) JF - Scripta Botanica Belgica Y1 - 2006 A1 - Filip Verloove SP - 3 EP - 89 AB - Catalogue of neophytes in Belgium (1800-2005). A catalogue of Belgian neophytes has been compiled for the first time on the basis of a thorough and critical revision of the main public and some smaller but nevertheless relevant Belgian herbaria. All non-native vascular plant species, recorded in Belgium since 1800, are included regardless of degree of naturalization (including occasional garden escapes and casual aliens as well as invasive taxa). Taxa that were already naturalized in Belgium in pre-Columbian times, are excluded. The following data are provided for each taxon: scientific name, synonym, family, mode of introduction (accidental/deliberate), date of the first collection (except if earlier reliable records are available), date of the most recent record, native geographic area, presence or absence in Flanders, Brussels Capital Region and Wallonia (the three main political units), degree of naturalization and (main) vector(s) of introduction. 1,969 taxa are included. More than 20 % appears to be “new” for the Belgian flora. On the other hand, at least 30 taxa were erroneously included in the presentday Flora and need to be omitted in a future edition. Assessing the exact status of many taxa of the “Belgian” flora proved to be problematic. On the one hand, the distinction between native and non-native turned out to be often critical (for instance: interpretation of natural range extensions). On the other hand, assessing archaeophytic or neophytic status for (presumed) non-native taxa turned out not to be always obvious. Similarly, the assessment of the degree of naturalization (measurement of a taxon’s success) was not always straightforward. In practice, and despite numerous recent international papers on this subject, the distinction between “naturalized” and “invasive” regularly proved to be arbitrary. The Belgian non-native vascular flora is remarkably wealthy and diverse: no less than 139 families are represented but most families count for only (very) few taxa. Poaceae and Asteraceae are the largest families and represent more than a quarter of the total number of alien taxa in Belgium. A huge number of the aliens were initially introduced deliberately, primarily for horticultural reasons. Among the naturalized and/or invasive taxa the proportion of deliberate introductions is even more important (ca. 60 %). Introductions from Europe and temperate Asia are most common. To a lesser extent, Africa (especially North-Africa) and America (especially North-America) are also important sources. As expected, the number of introductions from Australia, tropical Asia and the (sub-) tropics as a whole is limited. A large majority, at least 75 %, of the introductions remains strictly casual. At most 20 % is able to become naturalized, locally as well as widespread. At present, the number of invasive taxa (spreading fast in more or less natural habitats) and noxious taxa (harmful in terms of biodiversity, public health or for economic reasons) is limited. Currently, the main vector for plant introductions appears to be horticulture (garden escapes). Until the 1960’s woolimportation was chiefly responsible for the occurrence of accidental aliens. Nowadays, accidental aliens are usually brought in with cereals and grains. The number of new introductions has much increased in the course of the past decades. Similarly, the number of newly naturalized taxa has increased. PB - National Botanical Garden Belgium CY - Meise, Belgium VL - 39 SN - 90-72619-71-4 ER - TY - JOUR T1 - Chenopodium berlandieri, een in Vlaanderen miskende neofyt JF - Dumortiera Y1 - 2006 A1 - Filip Verloove A1 - Ward Vercruysse A1 - Geert Heyneman SP - 20 EP - 26 VL - 88 ER - TY - JOUR T1 - Aubrieta columnae, sinds tientallen jaren standhoudend op een oude muur in Brugge (West-Vlaanderen, België) JF - Dumortiera Y1 - 2006 A1 - Filip Verloove A1 - Wouter Van Landuyt SP - 27 VL - 88 ER - TY - JOUR T1 - Minuartia mediterranea, een nieuwe urbane neofyt in België JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 15 EP - 18 AB - Minuartia mediterranea, a new urban neophyte in Belgium. In the summer of 2004 a small population of the mediterranean Minuartia mediterranea was discovered on pavement and an old brick stone quay in the city of Ghent (prov. East-Flanders, Belgium). In 2005 numerous additional records were made the vicinity. It is believed to have recently naturalised. A description (incl. a scan of a herbarium specimen) and some remarks about locality, growing conditions and origin are presented. VL - 90 ER - TY - JOUR T1 - Een nieuw gazononkruid in België: Pratia pedunculata (Lobeliaceae) JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 23 EP - 24 VL - 89 ER - TY - JOUR T1 - Atriplex micrantha, een nieuwe neofyt langs belangrijke verkeerswegen in België JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 15 EP - 20 VL - 88 ER - TY - JOUR T1 - Graanadventieven nieuw voor de Belgische flora, hoofdzakelijk in de periode 2001-2003 JF - Dumortiera Y1 - 2006 A1 - Filip Verloove SP - 1 EP - 6 AB - New grain aliens in the Belgian flora, primarily over the period 2001-2003. Further research on the adventitious flora related to grain importation in Belgium yielded eight new taxa for the Belgian flora: Aeschynomene americana, Alternanthem tenella, Chamaesyce glyptospenna, Linaria chalepensis, Ornithogalum narbonense, Setaria spliacelata, Trigonella corniculata and Vicia narbonense subsp. sermtifolia (this last taxon has been mentioned before in Belgium but was erroneously omitted in recent editions of the Belgian flora). The present paper describes the new taxa and provides details about their origin, mode of introduction, and references to other European records. The African Setaria sphacelata is probably recorded for the first time in Europe. VL - 88 ER - TY - JOUR T1 - Eupatorium maculatum, nieuw voor Europa, ingeburgerd in Sint-Martens-Latem (Oost-Vlaanderen, België) JF - Dumortiera Y1 - 2006 A1 - Filip Verloove A1 - Wim Slabbaert SP - 12 EP - 15 VL - 88 ER -