Flora Pittsburghensis

Wild flowers of Pittsburgh and western Pennsylvania


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Squirrel Corn (Dicentra canadensis)

Dicentra canadensis

Squirrel Corn is easily confused with Dutchman’s Breeches (Dicentra cucullaria), but the shape of the flowers is an infallible marker. These are shaped like the common Bleeding-Hearts of our gardens; they lack the legs that make Dutchman’s Breeches look like a pair of pantaloons hung out to dry. These were blooming in Fox Chapel near the Trillium Trail at the beginning of May.

Squirrel Corn


More at the full article on Dicentra canadensis.


Toadshade (Trillium sessile)

Trillium sessile

We have added several more pictures of both the deep-brown and pale-green forms to the species page for Trillium sessile.

Trillium sessile


Dwarf Larkspur (Delphinium tricorne)

Delphinium tricorne

Not a common plant around here, but locally abundant. The shockingly blue flowers and palmate leaves are distinctive: nothing else remotely like these Larkspurs is blooming in early spring. These plants were part of a large colony in the woods near Mayview State Hospital, where they were blooming in April. The pictures were taken on film in the year 2000, and sat forgotten in a box of slides until recently.

More at the full article on Delphinium tricorne.


Wake-Robin (Trillium erectum)

Trillium erectum, rose form

We have added a second page of pictures, including this rare dusty-rose form. See the main species page for a description.


Virginia Bluebells (Mertensia virginica)

Mertensia virginica, white form

We have added a second page of pictures, including the white form above, because we can never resist taking more pictures of Virginia Bluebells, and it would make the species page considerably less useful as a reference to be weighed down with an endless parade of pictures.


Persian Speedwell (Veronica persica)

Veronica persica Photographed April 13.

Persian Speedwell is one of our earliest and most beautiful spring flowers. It is so tiny and so ubiquitous, however, that it passes unnoticed even when it lights up our lawns with sky-blue flowers. The blooming period begins in March, or even late February, and is generously long. These flowers were blooming in the middle of April.

More at the article on Veronica persica.


Lesser Celandine (Ficaria verna)

Ficaria verna

Formerly known as Ranunculus ficaria, Lesser Celandine is a European import that is rapidly colonizing our stream valleys. Only seven years ago we wrote that it was “not very common around here except in a few stream valleys,” but since then it has popped up a number of other places where it was previously unknown. These particular flowers were blooming in Bird Park, Mount Lebanon, where the plant was not to be found in 2015, but has since established some sizeable clumps and is rapidly becoming a notable feature of the early-spring flora.

Ficaria verna

More at the article on Ficaria verna.


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