Abstract:The chromosome number and karyotype of a cultivar in the Asteraceae, Solidago canadensis var. gilvocanescens Rydb., cultivated in Foshan City, Guangdong Province, China, were reported. The chromosomes were counted to be 2n=18, and one pair of them had satellites on their short arms. The karyotype was formulated as 2n=2x=18=14m+4sm (2SAT), and belonged to Stebbins’ 2A type.