Although violet is the usual color of Viola sororia, a white form sometimes appears. This one was growing between the bricks of a sidewalk in Allegheny West.
For a description of the species, see the Viola sororia reference page.
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Common Blue Violet (Viola sororia), White Form
Photographed April 18 with a Fujifilm FinePix HS10. 
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Common Blue Violet (Viola sororia)
Photographed April 17 with a Konica Minolta DiMAGE Z6. The fact that they are so common as to be nearly ubiquitous does not make these violets any less delightful. Here we see them blooming in the Seldom Seen Greenway near Saw Mill Run.
For a description of the species, see the Viola sororia reference page.
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Toadshade (Trillium sessile)
Photographed April 17 with a Konica-Minolta DiMAGE Z6. Toadshade most commonly has dark brownish-purple flowers, but the green form is not uncommon. Here we see it blooming by Saw Mill Run in Seldom Seen. Some botanists distinguish the green form as forma viridiflorum; others just say that sometimes Trillium sessile is green and nothing can be done about it. There are also intermediate forms with brownish-green or greenish-brown flowers.
For a description of the species, see the Trillium sessile reference page.
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Virginia Bluebells (Mertensia virginica)
Photographed April 17 with a Konica Minolta DiMAGE Z3. Virginia Bluebells blooming by Saw Mill Run in Seldom Seen.
For a description of the species, see the Mertensia virginica reference page.
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Dutchman’s Breeches (Dicentra cucullaria)
Photographed April 7. Just coming out in Bird Park, Mount Lebanon. For a description, see the Dicentra cucullaria reference page.
