Prosartes parvifolia
Prosartes parvifolia is a rare plant species endemic to a small region in the Siskiyou Mountains of the United States. It is known from only 4 counties: 2 in California and 2 in Oregon. The species has been considered by some authorities as part of P. hookeri but others accept Prosartes parvifolia as a separate species.
Prosartes parvifolia is a rather stout plant with densely hairy ovate leaves. It can be distinguished from P. hookeri because P. parvifolia has single-locule ovaries and anthers much longer than the filaments.