Heuchera grossulariifolia “Gooseberry Alumroot” Saxifragaceae
Weir Hot Springs, Clearwater National Forest, ID
June 8, 2015
These lovely Saxifrags are endemic to the PNW (southwest Montana to the southern Cascades) where they can be found on well-drained, somewhat shady slopes and cliff-faces. In many parts of its range, two distinct populations of H. grossulariifolia occur side-by-side, and may be evolving into separate species. Due to an accidental duplication of its genome, tetraploid populations of H. grossulariifolia bloom earlier and grow larger than their diploid counterparts, and hybrids between the two populations have low fertility. This suggests that the two populations may be genetically isolated enough to become separate species in the future.