Lonicera involucrata var. involucrata

Twinberry honeysuckle

Family: Caprifoliaceae · Type: shrub · Native

Twinberry honeysuckle is a California native shrub found in the Klamath Ranges, northern coastal ranges, high Cascade Range, Sierra Nevada, and North Coast Mountains in moist habitats at elevations of 600 to 2,900 meters. Flowering from May to June, this plant produces yellow flowers with a corolla tube that widens toward the top, creating distinctive bell-shaped blooms. Growing 60 to 90 centimeters tall with an upright, multi-stemmed form, the shrub develops branching stems that create a dense, rounded appearance. Its leaves are soft and non-leathery, arranged oppositely along the stems, providing a lush green backdrop to the bright yellow flowers. The plant's stigma extends beyond the flower tube, a unique characteristic that likely aids in pollination.

Habitat: Moist places

Bloom period: May-Jun

Elevation: 600-2900 m

Bioregions: KR, NCoRH, CaRH, SN, MP

California counties: Plumas, Tulare, Fresno, Alpine, Modoc, Amador, El Dorado, Glenn, Mariposa, Placer, Shasta, Tehama, Butte, Madera, Mono, Nevada, Tuolumne, Sierra, Siskiyou, Yuba, Inyo

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.