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Cephalanthus occidentalis

Cephalanthus occidentalis

Cephalanthus occidentalis var. occidentalis
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Rubiales
Family: Rubiaceae
Genus: Cephalanthus
Species: C. occidentalis
Binomial name
Cephalanthus occidentalis

Cephalanthus occidentalis (Buttonbush, Button-bush, Button-willow or Honey-bells) is a species of Cephalanthus native to eastern and southern North America.

It is a deciduous shrub or small tree growing to 2-10 m (rarely 15 m) tall. The leaves are opposite or in whorls of three, elliptic to ovate, 7-20 cm long and 3-7 cm broad, with an entire margin and a short petiole. The flowers are produced in a dense globular inflorescence 2.5-3.5 cm diameter on a 2.5–5 cm peduncle. Each flower has a fused white to pale yellow four-lobed corolla forming a long slender tube connecting to the calyx. The stigma is long, protruding from the corolla by about 4 mm.

There are two varieties, not considered distinct by all authorities:

  • Cephalanthus occidentalis var. occidentalis (syn. var. pubescens) – Common Buttonbush. Eastern North America from Nova Scotia west to Minnesota and south to Florida and eastern Texas.
  • Cephalanthus occidentalis var. californicus – California Button-willow. Southwestern North America, from western Texas west to California (Sierra Nevada foothills, San Joaquin Valley, Sacramento Valley, and the Inner North Coast Ranges) and south to Mexico and Central America.


  • USDA Plants Profile: Cephalanthus occidentalis
  • Missouriplants: Cephalanthus occidentalis var. occidentalis
  • Jepson Flora Project: Cephalanthus occidentalis var. californicus
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cephalanthus_occidentalis". A list of authors is available in Wikipedia.
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