Ribes californicum, with the common name hillside gooseberry, is a North American species of currant. It is endemic to California, where it can be found throughout many of the California Coast, Transverse, and Peninsular Ranges in local habitat types such as chaparral and woodlands.
Ribes californicum is a mostly erect shrub growing to a maximum height around 1.4 metres (4.6 ft). Nodes along the stem each bear three spines up to 1.5 centimetres (0.59 in) in length. The hairy to hairless leaves are 1–3 centimetres (0.39–1.18 in) long and divided into 3–5 centimetres (1.2–2.0 in) oblong, toothed lobes.
The inflorescence is a solitary flower or raceme of up to three flowers which hang pendent from the branches. The flower has five sepals in shades of deep red or green with a red tinge, which are reflexed upward. At the center is a tubular corolla of white or pinkish petals around five stamens and two longer styles.
The fruit is an edible red berry about a centimeter wide which is covered in stiff spines.
- Ribes californicum var. californicum - mostly Coast Ranges from Ventura County to Mendocino County, with additional populations in Orange County
- Ribes californicum var. hesperium - primarily San Gabriel Mountains in Southern California
- This species was first described and published in Botany of Captain Beechey's Voyage 346. 1839. "Plant Name Details for Ribes californicum". IPNI. Retrieved July 31, 2010.
- Grossularia californica; published in North American Flora 22: 214. 1908. New York Botanical Garden. "Plant Name Details for Grossularia californica". IPNI. Retrieved July 31, 2010.
- "Ribes californicum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 22 October 2015.
- Calflora taxon report, University of California, Ribes californicum Hook. & Arn., California gooseberry, hillside gooseberry
- Flora of North America; Ribes californicum