Common buttonbush
Cephalanthus occidentalis
Synonyms: Cephalanthus angustifolius, Cephalanthus occidentalis f. lanceolatus, Cephalanthus oppositifolius, Cephalanthus pubescens, Cephalanthus berlandieri, Cephalanthus occidentalis var. obtusifolius, Cephalanthus obtusifolius, Cephalanthus acuminatus, Cephalanthus occidentalis var. californicus, Cephalanthus occidentalis var. macrophyllus, Cephalanthus hansenii, Cephalanthus occidentalis var. brachypodus, Cephalanthus occidentalis subsp. californicus, Cephalanthus occidentalis var. pubescens
Western Herbalism Properties
Gallery
Botanical Description
Cephalanthus occidentalis, commonly called buttonbush, is a deciduous wetland shrub or small tree in the family Rubiaceae, typically 1-3 m tall but occasionally reaching 6 m. Leaves are opposite or in whorls of three, elliptic to ovate, 7-18 cm long and 4-10 cm broad, with smooth (entire) margins, a glossy upper surface, and short petioles. The distinctive inflorescences are spherical white to pale-yellow flower heads 2-3.5 cm in diameter borne on long stalks; each head is composed of numerous small four-lobed tubular corollas with prominent exserted styles, giving the cluster a pincushion appearance and providing abundant nectar to bees and butterflies. Flowering occurs from late spring through summer. The fruit is a globose cluster of small reddish-brown achenes (nutlets) that persists into winter and provides food for waterfowl. The species is native to eastern and central North America from southern Canada through the eastern United States to Cuba and Mexico, with western disjunct populations in California and Arizona. It inhabits swamps, pond margins, riparian zones, floodplains, and bottomland forests, often standing in shallow water. All parts of the plant contain the toxic glycoside cephalanthin.
Cultural & Historical Context
Traditional American Uses
Cephalanthus occidentalis has 26 documented NAEB ethnomedicinal uses concentrated among Southeastern and southern Plains tribes, particularly the Seminole (13 uses), Choctaw (7), Koasati, Chickasaw, Comanche, Kiowa, and Meskwaki. Drug applications account for nearly the entire record (25 uses), with the bark and root used as eye medicines (3 uses), antidiarrheals (2), febrifuges (2), toothache remedies (2), and urinary aids (2), as well as tonics, antihemorrhagics, antirheumatics, orthopedic aids, emetics, analgesics, antiemetics, blood medicines, cathartics, laxatives, gastrointestinal aids, and a general strengthener (NAEB).
The Seminole and Choctaw employed inner-bark and root-bark decoctions most extensively, treating fevers and intermittent malaria-like complaints, eye inflammations, toothache, and rheumatic pain (Sturtevant, 1955; Bushnell, 1909). Bark preparations were also taken as a bitter tonic and astringent to halt diarrhea and dysentery, and externally for wounds. The Comanche and Kiowa used the bark for sore eyes and as a stomach remedy (Carlson & Jones, 1939). Buttonbush entered nineteenth-century Eclectic Western herbalism as a febrifuge and tonic, valued for its bitter principle, though modern caution is advised because of the toxic glycoside cephalanthin in all parts (Felter & Lloyd, 1898; NAEB Use IDs in 30,000-range).
Chemistry & External Identifiers
Important Disclaimer
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.