Rhamnus californica Eschsch. ssp. occidentalis (Howell) C.B. Wolf
[= Frangula californica ssp. occidentalis]
Annotated by Steward, A., 1957.

Oregon: Josephine: Illinois River area, Briggs Creek, 3 miles east of mouth; 10 mi. (airline) n.w. of Selma. Elev. 950 ft.
42.38105° N, 123.76797° W,
Datum: NAD83. Coordinate Source: OrlookId: 57237, StateProvince: Oregon, County: Josephine, LocName: 37S 09W 04. OregonFlora 1994-2020 methodology.
In mixed woodland; dry rocky loam soil. HerbariumSpecimenDuplicate: Rhamnus californica ssp. occidentalis | herbariumSpecimenDuplicate: Rhamnus californica ssp. occidentalis | herbariumSpecimenDuplicate: Rhamnus californica Https://oregonflora.org/collections/individual/index.php?occid=4445170. Phenology: flowering.

Albert N. Steward 7301, May 31, 1957
OSC, Catalog: OSC-V-030511, Accession Number: OSC97160