TY - CONF T1 - Ornamentals and invasive plants: if you choose one you get the other as well T2 - Mini symposium on aliens and invasive species Y1 - 2013 A1 - Ivan Hoste JF - Mini symposium on aliens and invasive species PB - National Botanic Garden of Belgium CY - National Botanic Garden of Belgium, Domein van Bouchout, B-1860 Meise, Belgium ER - TY - JOUR T1 - Een sleutel voor het genus Oxalis in België, met commentaar bij de waargenomen soorten JF - Dumortiera Y1 - 2012 A1 - Ivan Hoste SP - 9 EP - 22 AB - Abstract. – An identification key for the genus Oxalis in Belgium, with comments on the observed species. In the past few decades several different species of the genus Oxalis have been recorded as new to Belgium. Horticultural activities play an important role in the introduction and local dispersal of both cultivated species (as garden escapes) and weeds. A key for the identification of twelve species is followed by brief comments. Particular attention is drawn to gaps in the present state of our knowledge: distribution and status in Belgium, morphological variation within certain species, and identification problems. VL - 101 UR - http://www.br.fgov.be/DUMORTIERA/DUM_101/Dum%20101_9-22_Oxalis_Hoste.pdf ER - TY - JOUR T1 - Mediterrane brandnetels in Gent: Urtica pilulifera en Urtica membranacea JF - Dumortiera Y1 - 2012 A1 - Wouter Van Landuyt A1 - Ivan Hoste A1 - De Rycke SP - 29 EP - 32 VL - 100 ER - TY - JOUR T1 - The Naturalisation History of Echinochloa Muricata in Belgium, With Notes on its Identity and Morphological Variation JF - Belg. Journ. Bot. Y1 - 2004 A1 - Ivan Hoste SP - 163 EP - 174 KW - aliens KW - Belgium KW - Echinochloa muricata KW - Poaceae AB - In Western Europe and North America Echinochloa muricata (P. Beauv.) Fernald (native in North America) has long been confused with Echinochloa crus-galli (L.) P. Beauv. (native in Europe). After its introduction in Europe, it took a long time before it was recognised, and later confusion lingered on, in part because the variability of E. muricata was not sufficiently taken into account in keys and descriptions. In the present paper, the difference between E. crus-galli and E. muricata is discussed, and the variability of E. muricata is illustrated. Belgian herbarium specimens labelled E. crus-galli and E. muricata have been revised. Since 1887 (year of the first collection) E. muricata var. microstachya Wiegand has gradually spread and is now locally naturalised and abundant, whereas var. muricata is only known as a rare casual. VL - 137 IS - 2 ER - TY - JOUR T1 - Invasieve en andere niet-inheemse planten JF - Groencontact Y1 - 2010 A1 - Ivan Hoste SP - 6 EP - 9 VL - 36 IS - 2 ER - TY - JOUR T1 - Een nieuw Amerikaans stadsgras in België: Muhlenbergia mexicana JF - Dumortiera Y1 - 2010 A1 - Ivan Hoste A1 - Filip Verloove SP - 10 EP - 12 AB - A new American urban grass species in Belgium: Muhlenbergia mexicana. Muhlenbergia mexicana (L.) Trin., native in North America, has been repeatedly recorded from urban habitats in Belgium since 2005. A short description and an illustration are given, and the main diagnostic features are discussed. An unintentional introduction through plant VL - 98 ER - TY - Generic T1 - Mediterranean container plants and their stowaways: A potential source of invasive plant species T2 - Science Facing Aliens Y1 - 2009 A1 - Ivan Hoste A1 - Filip Verloove SP - 39 EP - 44 JF - Science Facing Aliens T3 - Proceedings of a scientific meeting on Invasive Alien Species PB - Belgian Biodiversity Platform CY - Brussels SN - 9789081514903 ER - TY - JOUR T1 - Een nieuwkomer in sierteeltbedrijven en tuinen: Cardamine corymbosa in Nederland en België JF - Dumortiera Y1 - 2008 A1 - Ivan Hoste A1 - René R.C.M J. Van Moorsel A1 - Rutger Barendse SP - 15 EP - 24 AB - Cardamine corymbosa in nurseries and gardens, a recent addition to the alien flora of the Netherlands and Belgium. Around 1975, Cardamine corymbosa Hook.f. was introduced to the British Isles, most probably with nursery plants imported from New Zealand. Some years later it appears to have crossed the North Sea and is now spreading in the Netherlands and Belgium. An overview of records for both countries is given, together with notes on its identification, ecology and potential as an invasive alien following exchanges between nurseries, plant centres and gardeners. It is shown that so far only little information about its introduction and spread has been exchanged between botanists and horticulturists. VL - 93 ER - TY - JOUR T1 - De adventievenflora van in België ingevoerde mediterrane containerplanten JF - Dumortiera Y1 - 2009 A1 - Filip Verloove A1 - C. Nagels A1 - L. Andriessen A1 - Ivan Hoste A1 - Jacques Lambinon SP - 1 EP - 16 VL - 97 ER - TY - JOUR T1 - Aeschynomene indica, nieuw voor de Belgische adventievenflora JF - Dumortiera Y1 - 2002 A1 - Ivan Hoste SP - 22 EP - 24 VL - 79 ER - TY - JOUR T1 - Twee recente groeiplaatsen van Lepidium heterophyllum Benth. (Brassicaceae) in Oost-Vlaanderen JF - Dumortiera Y1 - 1998 A1 - Ivan Hoste SP - 12 EP - 17 VL - 72 ER -