– California waterwort
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Utah, and New Mexico.
Habitat: Pools, pond shores, and stream banks.
Origin: Native
Flowers: June-August
Growth Duration: Annual
– Chilean waterwort
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California, east to Nevada, Arizona, and New Mexico.
Habitat: Muddy shores (fresh or tidal), shallow vernal pools, and ditches.
Origin: Native
Flowers: June-August
Growth Duration: Annual