Plains Cymopterus, Plains Springparsley, Stemless Cymopterus: Cymopterus acaulis var. acaulis -
Greeley's Cymopterus, Greeley Springparsley: Cymopterus acaulis var. greeleyorum -
Dwarf Cork-seed, Corrugated Spring Parsley, Wrinklewing Springparsley: Cymopterus corrugatus (Synonyms: Cymopterus plurijugus, Rhysopterus plurijugus) - Leaves with broad, flattened leaflets. Plants often blue-green to reddish tinged. Flowers white. Low altitude plants found in the basins, low valleys and foothills from 750-1400 meters of elevation.
Ibapah Springparsley, Sprawling Stick Parsley: Cymopterus longipes var. ibapensis (Synonyms: Cymopterus ibapensis, Cymopterus longipes ssp. ibapensis, Cymopterus watsonii, Epallageiton ibapense, Epallageiton watsonii) -
Elko Spring Parsley, Snowline Springparsley: Cymopterus nivalis (Synonyms: Aletes bipinnata, Aletes nivalis, Cymopterus. bipinnatus, Cymopterus humboldtensis) - Plants low and tufted. Leaves pinnatifid with smaller, thinner leaflets further divided into narrow segments. Bracts of the umbellets small and narrow. Flowers whitish. Plants of rocky ledges or dry alpine meadows high in the mountains from 2700-3300 meters in elevation.
Rock Spring Parsley, Rock-loving Cymopterus, Rockloving Wavewing: Cymopterus petraeus (Synonyms: Aletes petraea, Cymopterus terebinthinus var. petraeus, Pteryxia petraea) - Leaves pinnately compound but but appearing very open. The leaflets and small, thin segments are widely spaced. Flowers yellow. Plants of open, rocky places in the desert to cliff crevices in the mountains. Found from 900-2700 meters of elevation.
Purple Cymopteris, Spring Parsley, Widewing Springparsley: Cymopterus purpurascens - Leaves pinnatifid with smaller, thinner leaflets further divided into narrower segments. Umbel subtended by a prominent, cup-shaped involucre, the base of the lobes united. Flowers white to purple. Plants of the valleys and foothills from 1300-2300 meters of elevation.
Aromatic Spring-parsley, Fennel Cymopterus, Fennel-leaved Cymopterus, Turpentine Wavewing: Cymopterus terebinthinus var. foeniculaceus (Synonym: Pteryxia terebinthina var. foeniculacea) - Leaves 2-3 times ternate-pinnately dissected with narrow segments, the segments appearing more or less crowded. Bracts below the umbellets small and narrow, not cup-shaped. Wings of the fruit scarcely wavy. Flowers yellow. Plants of the foothills to near timberline in the mountains from north-central Oregon south and east.
Northern Indian Parsnip, Turpentine Cymopterus, Turpentine Wavewing: Cymopterus terebinthinus var. terebinthinus (Synonyms: Cymopterus terebinthinus, Pteryxia terebinthina var. terebinthina) - Leaves 2-3 times ternate-pinnately dissected with narrow segments, the segments appearing more or less crowded. Bracts below the umbellets small and narrow, not cup-shaped. Flowers yellow. Wings of the fruit distinctly wavy. Plants of low elevations in the Columbia Plateau of Washington and northern Oregon.