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Frangula rubra
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Rhamnaceae
Genus:	Frangula
Species:	F. rubra
Binomial name
Frangula rubra (Greene) Grubov
Synonyms
Rhamnus rubra Greene

Frangula rubra (syn. Rhamnus rubra) is a species of flowering plant in the buckthorn family known by the common names red buckthorn and Sierra coffeeberry.

Distribution

It is native to the mountains and plateau areas of northern and eastern California and western Nevada, including the Sierra Nevada and Klamath Mountains, where it grows in many habitat types, including forests, chaparral, and sagebrush.

Description

Frangula rubra is a spreading shrub approaching two meters in maximum height, its bark red or gray. The thin, deciduous leaves are generally oval in shape, green to grayish in color, and up to 8 centimeters long. The edges are smooth or faintly toothed. The inflorescence is an umbel of up to 15 flowers with five pointed sepals opening into a starlike shape and five smaller, greenish petals. The fruit is a drupe which ripens to black. It measures just over a centimeter long and contains 2 seeds.

External links

• Jepson Manual Treatment - Rhamnus rubra
• USDA Plants Profile: Frangula rubra
• Rhamnus rubra - Photo gallery

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• v
• t
• e

• Frangula
• Flora of California
• Flora of Nevada
• Flora of Oregon
• Natural history of the California chaparral and woodlands
• Flora of the Cascade Range
• Flora of the Great Basin
• Flora of the Klamath Mountains
• Flora of the Sierra Nevada (United States)
• Taxa named by Edward Lee Greene
• Plants described in 1887
• Rhamnaceae stubs