Polemonium eddyense Stubbs, sp. nov. (Polemoniaceae) is a localized endemic from Mt. Eddy in the Klamath Ranges of northern California. The new species resembles P. chartaceum H. Mason from the White and Sweetwater mountains. It is distinct from P. chartaceum in having round, rather than acuminate calyx lobes, heavier seeds, longer styles, and greater stigma exsertion. Polemonium pulcherrimum Hooker var. shastense (Eastw.) Stubbs, is a new combination from Mt. Shasta and Mt. Lassen. It differs from other varieties of P. pulcherrimum in corolla color, as well as geography, elevation, stature, and pubescence.