RHH's photos with the keyword: rydberii

These are some of the wildflowers we found growing in the lava flows around Cinder Butte in Newberry National Volcanic Monument in Oregon. You can see a bit of the lava cinders in this photo of Rydberg's Penstemon and it is even more evident in the other photos. One wildflower, the Hot-rock Penstemon grows only in lava flows and so its range is very limited.