Synonyms recognized by ITIS (bold taxon is currently accepted):

     Cephalanthus occidentalis L.
     Cephalanthus occidentalis var. californicus Benth.
     Cephalanthus occidentalis var. pubescens Raf.

Common Name(s): buttonbush, common buttonbush.

Taxonomic Hierarchy: (ITIS TSN=34786, click for more information and references)

        Kingdom: Plantae
            Subkingdom: Tracheobionta
                Division: Magnoliophyta
                    Class: Magnoliopsida
                        Subclass: Asteridae
                            Order: Rubiales
                                Family: Rubiaceae
                                    Genus: Cephalanthus
                                        Species: Cephalanthus occidentalis