A nice, fresh Speyeria hydaspe viridicornis nectaring on roadside mint posed for plenty of photos for me on July 9, 2017; the two below are this same butterfly.

Same; this was along Hwy. 155 in Alta Sierra, not far from the turn to Shirley Meadows, a classic location for these.

The underside of Speyeria hydaspe viridicornis is distinctive. Then again, both sides have a rich, dark aspect that sets them apart.

I believe this was my first shot of Speyeria hydaspe viridicornis, from its classic location at Shirley Meadows in the Greenhorns from July 20, 2012.

From further north at Lloyd Meadow later on the same day as the one just above: a fresher Hydaspe fritillary.