Slender White Heather, Piper's Mountain Heather
Cassiope mertensiana var. gracilis
Synonym: Cassiope mertensiana ssp. gracilis

Slender white heather as seen in a wet meadow at the east side of Maxwell Lake, Eagle Cap Wilderness........August 3, 2016.
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Slender white heather as seen in a wet meadow at the east side of Maxwell Lake, Eagle Cap Wilderness........August 3, 2016.
Paul Slichter