Page authors: Don Knoke, David Giblin
Lonicera involucrata
bearberry honeysuckle, black twin-berry
WTU specimens
Other herbaria

Distribution: Both sides of the Cascades in Washington; Alaska south to California, east to Montana and New Mexico.

Habitat: Common in open woods at low to mid-elevations.

Flowers: April-August

Origin: Native

Conservation Status: Not of concern


Deciduous, erect shrubs 0.5-4 m. tall, with gray, shaggy bark, the young twigs quadrangular.


Leaves opposite, short-petiolate, elliptic-oblong to elliptic-ovate, pointed, 5-14 cm. long and 2-8 cm. wide, usually glabrous above and stiff-hairy below.


Peduncles axillary with two pairs of conspicuous bracts at the summit, broad and green or purple-tinged, becoming purplish-red and spreading in fruit; flowers paired, closely subtended by the bracts; corolla yellow, sometimes tinged with red, glandular-pubescent, 1-2 cm. long, shortly and sub-equally lobed, with a short, thick spur at the base; stamens 5, ovary 3-celled, inferior.


Fruit a shiny, black, globose berry 1 cm. thick.

Accepted Name:
Lonicera involucrata (Richardson) Banks ex Spreng.

Synonyms & Misapplications:
Distegia involucrata (Richardson) Cockerell
Xylosteon involucratum Richardson
var. involucrata – bearberry honeysuckle, black twin-berry    Alaska to California, east to Montana and New Mexico
Additional Resources:

PNW Herbaria: Specimen records of Lonicera involucrata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lonicera involucrata checklist entry.

E-Flora BC: Lonicera involucrata atlas page.

CalPhotos: Lonicera involucrata photos.

USDA Plants: Lonicera involucrata information.

64 photographs:
Group by