3 species
4 subspecies and varieties
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Hydrophyllum capitatumwool breeches, ballhead waterleaf
Distribution: Occurring mostly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist, open slopes and woodlands, foothills to middle elevations in the mountains.
Origin: Native
Flowers: March-July
Growth Duration: perennial
var. capitatum – wool breeches, ballhead waterleaf
var. thompsonii – Thompson's wool breeches, Thompson's ballhead waterleaf
Hydrophyllum fendleriFendler's waterleaf
Distribution: Widely distributed throughout much of Washington; British Columbia south to California, east to Utah.
Habitat: Thickets and moist open places, from lowlands to mid elevations in mountains.
Origin: Native
Flowers: May-August
Growth Duration: perennial
var. albifrons – Fendler's waterleaf
var. fendleri – Fendler's waterleaf
Hydrophyllum tenuipesPacific waterleaf
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.
Habitat: Forest understory and edge at low elevations, often where moist.
Origin: Native
Flowers: May-July
Growth Duration: perennial