https://www.floraxchange.nl/Artikel/Info/289638/Cephalanthus-occidentalis
Cephalanthus occidentalis (ceocciP19) - FloraXchange
cephalanthus
https://fsus.ncbg.unc.edu/main.php?pg=show-taxon.php&&family=Rubiaceae&limit=1&offset=13&taxonid=9326
Cephalanthus salicifolius (Mexican Buttonbush) - FSUS
cephalanthusmexicanbuttonbush
https://www.auneherbarium.org/specimen.php?AccessionN=1490
AUNE Herbarium | Cephalanthus occidentalis
The Herbarium at Antioch University New England includes over 3000 plant specimens representing about 1000 species, primarily from the New England region.
auneherbariumcephalanthus
https://www.leavesforwildlife.com/product-page/buttonbush-cephalanthus-occidentalis
Buttonbush, Cephalanthus occidentalis | Leaves for Wildlife
Rain gardens, stream banks, and low-lying areas are the perfect settings for this showy, semi-aquatic shrub adorned with flowers resembling Victorian...
buttonbushcephalanthusleaveswildlife