lemmon`s rockcress boechera lemmonii wildflowers blooming on the slopes of lassen volcanic national park, northern california

america arabis beautiful beauty bloom blooming blossom boechera botanical botany california closeup color copy county day flora floral flower fresh green lassen leaf lemmon lemmonii lemmons lilac national native natural nature northern park pink plant polyclada purple rockcress season shasta slopes space states summer sunny united usa volcanic wild wildflowers