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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
L.

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

Additional recommended knowledge

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.

References

  • 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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