 This plant grows on vertical limestone cliffs, often in spots shaded by Douglas-fir ("Pseudotsuga menziesii"), Rocky Mountain maple ("Acer glabrum"), and bigtooth maple ("A. grandidentatum").Other plants in the habitat include pink alumroot ("Heuchera rubescens"), mat rock spiraea ("Petrophyton caespitosum"), narrowleaf wildparsley ("Musineon lineare"), Maguire's primrose ("Primula cusickiana" var.