Mountain Bog Gentian: Gentiana calycosa
Explorer's Gentian, Mountain Bog Gentian, Rainier Pleated Gentian: Gentiana calycosa (Synonyms: Gentiana calycosa ssp. calycosa, Gentiana calycosa ssp. obtusiloba, Gentiana calycosa ssp. xantha, Gentiana calycosa var. calycosa, Gentiana calycosa var. obtusiloba, Gentiana calycosa var. xantha, Pneumonanthe calycosa) - Flowers typically single on each stem. One to several stems from 10-20 cm tall. Leaves circular, thick and fleshy and 1-3 cm long. Corolla 3-3.5 cm long with spreading lobes.
Glaucous Gentian, Pale Gentian: Gentiana glauca (Synonyms: Dasystephana glauca, Gentianodes glauca) - Found in tundra and alpine meadows of the north Cascades eastward to the higher peaks of the Okanogan in north-central Washington.
Pygmy Gentian, Moss Gentian: Gentiana prostrata - Flowers typically one per stem. Stems less than 10 cm tall. Leaves less than 1 cm long. Corolla less than 1 cm long.