Calamintha sylvatica – synonym of Clinopodium menthifolium
Cephalanthera ensifolia – synonym of Cephalanthera longifolia
Cephalanthera longifolia var. rosea – synonym of Cephalanthera longifolia
Cephalanthera xyphophylla – synonym of Cephalanthera longifolia
Chamomilla suaveolens – synonym of Matricaria discoidea
Chrysanthemum Leucanthemum – synonym of Leucanthemum vulgare
Chrysanthemum vulgare – synonym of Tanacetum vulgare
Coeloglossum alpinum – synonym of Coeloglossum viride
Coeloglossum viride var. bracteatum – synonym of Coeloglossum viride
Coeloglossum viride var. islandicum – synonym of Coeloglossum viride
Coeloglossum viride var. longibracteatum – synonym of Coeloglossum viride