Abstract.: Baltisberger M. and Widmer A. 2006. Chromosome numbers of plant species from the Canary Islands. Bot. Helv. 116: 9-30. Chromosome numbers are reported for 66 taxa (101 populations) of flowering plants representing 22 families from the Canary Islands. The chromosome numbers of Kleinia aizoides (Asteraceae, 2n=20) and Polycarpaea nivea (Caryophyllaceae, 2n=18) are given for the first time. Chromosome numbers of another 17 taxa are recorded for the first time from Canarian material. Karyotypes are presented for nine species (six endemic), and phytogeographic and for part of the species systematic aspects are discussed. For Bidens aurea, we provide evidence suggesting that this species might consist of more than one taxo
