Hydrophyllum genus --- Borage family

ballhead waterleaf (Hydrophyllum capitatum var. capitatum) -- in May -- Black Canyon of the Gunnison National Park, CO  blue & purple 

Fendler's waterleaf (Hydrophyllum fendleri) -- in June -- Pingree Park, Roosevelt National Forest, CO         white & cream        CO-M

Fendler's waterleaf (Hydrophyllum fendleri) -- in April -- Homestead Trail, South Mesa Trailhead, Boulder