Stream valleys with precipitous slopes—too precipitous even for Pittsburghers to build on—cut through the city and suburbs everywhere. In the spring, wild woodland flowers take advantage of the last few days before the leaves come out and the shade closes in. These flowers all grew within a few yards of each other in the Squaw Run valley.
Trillium grandiflorum, Large-Flowered Trillium
Mertensia virginica, Virginia Bluebells
Claytonia virginica, Spring Beauty
Phlox divaricata, Blue Phlox
Trillium erectum, Wake-Robin (white form)
[In an earlier version of this article, this was misidentified as Trillium cernuum.]
Tiarellia cordifolia, Foamflower
Viola pallens, Northern White Violet
Viola pennsylvanica, Smooth Yellow Violet
