A New Subalpine Species of Lomatium (Umbelliferae) from Eastern Oregon

Lomatium erythrocarpum, a new subalpine species collected from xeric south slopes in the higher Blue Mountains of northeastern Oregon, is described and illustrated It is distinguished by its diminutive stature, usually simple caudex, glabrous-glaucous habit, broadly winged rachises, white or purplish flowers, and glossy red-tinged fruit Comparisons are made with other morphologically and ecologically similar species from the Pacific Northwest and adjacent regions, including Lomatium martindalei, L donnellii, L canbyi, L attenuatum, Cymopterus glaucescens, and C ibapensis Evaluation of habitat and growth form suggest that the affinities of the new species lie with congeners adapted to lower elevations