|R. thacherianum growing in Escondido, California|
(Jeps.) Munz 1958
R. menziesii var. thacherianum Jeps. 1936 (basionym)
Ribes thacherianum is an erect shrub growing to a maximum height around 2.5 meters (over 8 feet). The stems are coated in soft light hairs and bristles, and many of the stem nodes bear hard spines. The leaves are 2 to 3 centimeters (0.8-1.2 inches) long and shallowly divided into five dully toothed lobes.
The inflorescence is made up of one or two flowers. Each flower has five reflexed pink sepals around a tube made up of smaller white petals. The stamens and stigmas protrude from the corolla. The fruit is a purple berry about 7 millimeters wide which is covered densely in bristles and hairs.
Ribes thacherianum is endemic to Santa Cruz Island, one of the northern Channel Islands of California, and within Channel Islands National Park. It grows in the pine woodlands of the coastal ravines.
- In: Aliso. A series of papers on the native plants of California 4: 92. 1958. "Plant Name Details for Ribes thacherianum". IPNI. Retrieved July 21, 2010.
Notes: R. menziesii var. thacherianum
- Treated as Ribes menziesii variety thacherianum, this species was first described and published in A Flora of California 2: 156. 1936 "Plant Name Details for Ribes menziesii var. thacherianum". IPNI. Retrieved July 21, 2010.
- Calflora taxon report, University of California, Ribes thacherianum (Jepson) Munz, Santa Cruz Island gooseberry, Santa Cruz gooseberry
- Flora of North America
- Jepson Manual Treatment - Ribes thacherianum
- United States Department of Agriculture Plants Profile Ribes thacherianum
- California Native Plant Society Rare Plant Profile: Ribes thacherianum
- Ribes thacherianum - Calphotos Photo gallery, University of California
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