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Young Opuntia pottsii variety montana, showing smallish globose tuberous taproot. On older plants this may be over four inches in diameter. Flowers at this location are yellow with an orangey center. Collected April 1987 when surveying future site of new Airport.

Photo credit to Dave Twist. For time/date of sighting, he said:

On June 15th 2023, asked Dave Twist when the Bobcat images were taken and he said:

"they were taken this year just a few weeks ago."

So I used May 10th 2023, but that could be a bit earlier or later.

By coincidence, this is the northernmost locality mapped by K.A. Frego & R.J. Staniforth, Canadian Field-Naturalist 100:229-236 (1986) (https://www.biodiversitylibrary.org/partpdf/355596). (Their Figure 2).