Woolen Breeches, Ballhead Waterleaf: Hydrophyllum capitatum var. alpinum -
Woolen Breeches, Ballhead Waterleaf: Hydrophyllum capitatum var. capitatum -
Thompson's Waterleaf, Grandma's Pincushion, Ballhead Waterleaf: Hydrophyllum capitatum var. thompsonii - Restricted to the Columbia River Gorge and east slopes of the Cascade Mts in Wasco County, Oregon and Klickitat County nortthward to Kittitas County as well as east in Adams County, Washington.
Fendler's Waterleaf, White-leaved Fendler's Waterleaf: Hydrophyllum fendleri var. albifrons (Synonyms: Hydrophyllum albifrons, Hydrophyllum congestum) -
Fendler's Waterleaf: Hydrophyllum fendleri var. fendleri -
Pacific Waterleaf, Slender-stemmed Waterleaf: Hyrophyllum tenuipes (Synonym: Hydrophyllum viridulum) - Occasionaly seen east of the eastern base of the Cascade Mountains.