Abstract
Sixteen species of Xanthoparmelia are recognised in the New Zealand flora. X. australasica D. Galloway is described and the new combinations X. flavescentireagens (Gyelnik) D. Galloway and X. mougeotina (Nyl.) D. Galloway are proposed. Typification, synonymy, morphology, chemistry, distribution, and habitat information of each taxon are given and a key to species includes the superficially similar Chondropsis semiviridis. X. amphixantha, X.flavescentireagens, X. hypoclystoides, X. mexicana, X. notata, X. thamnoides, X. tinctina, X. subnuda, and X. substrigosa are new to the New Zealand flora.