By Larry Halverson/Friends of Kootenay

Drummond’s Rockcress – one of the local mustards that provide nectar for many species of butterflies. The emergence of the Stella’s Orangetip Butterfly coincides every year exactly with the early spring flowering time of this rockcress. So when you see either one you know the other is near by.

Drummond’s Rockcress now blooming on the grassy hillsides around Radium Hot Springs

Stella’s Orangetips depend on mustards for their specific host plant –Photos by Larry Halverson

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