Flora Pittsburghensis

Liliaceae

Now divided by botanists into a number of different families and even different orders. We list the genera as they are listed in our 1951 Check List of the Vascular Flora of Allegheny County, which follows Gray’s Manual; but on the page for the individual species we note the family in which botanists currently place it.

Large-Flowered Bellwort (Uvularia grandiflora). These odd-looking plants bloom in late April; the flowers appear while the rest of the plant seems to be still under construction. They like moist woods, especially stream valleys. Supposedly not a very common plant, although it may be locally abundant.

Allium

Daylily (Hemerocallis fulva). This favorite garden perennial has naturalized itself quite successfully in western Pennsylvania, and huge colonies light up our roadsides in June. Countless variations have been bred for connoisseurs, but nothing matches the simple elegance of the original species. It was rare in the wild half a century ago, but now it is considered invasive.

Lilium

Trout Lily (Erythronium americanum). Also known as Dogtooth Violet or Adder’s Tongue, this very attractive plant is as remarkable for its mottled leaves as for its yellow flowers. It likes wooded stream valleys where the soil is very rich and moist.

Star of Bethlehem (Ornithogalum umbellatum). A European native that has made itself quite at home here, Star of Bethlehem can often be found in weedy patches of low grass. Until it blooms, its narrow leaves are hard to distinguish from the grass around them. The six-pointed white flowers are unmistakable, with six yellow-tipped stamens whose flattened “filaments” seem to form a miniature duplicate flower inside the larger one.

Hyacinthoudes non-scriptaEnglish Bluebells (Hyacinthoides non-scripta). These pretty little flowers are not recorded as growing in the wild around here, but this plant grew spontaneously in the city in a place where English Bluebells had not previously been planted. The arched stem, dangling blue-violet bells, and yellow stamens distinguish this from any similar species.

Clintonia

Smilacina

Melanthemum

Solomon’s Seal (Polygonatum pubescens). Arching fronds of alternate leaves hide the dainty little bells: you have to lift the stem, or crouch on the ground, to see the flowers. But it is worth the extra effort to reveal the flowers. They are small and green, but beautifully shaped.

Great White Trillium (Trillium grandiflorum). The Great White Trillium loves to grow in vast colonies. It’s not all that common, but when you do find a stand of them, it may cover acres. It is practically the symbol of spring in the woodlands, and it is responsible for converting many careless strollers into amateur botanists.

Wake-Robin (Trillium erectum). Also known as Stinking Willie for its unattractive scent (“like wet dog” is the best description we have heard), this beautiful Trillium comes in a wide range of colors. The most common around here seems to be the white form; elsewhere, the usual color is deep mahogany red, but we also find it in pink and yellow-green.

Toadshade (Trillium sessile). The most common form is deep mahogany red, but Pittsburgh seems to favor trillia in the wrong colors, and this is the more uncommon pale-green form. It is distinguished by its erect petals and often by mottled leaves, as we see here.

Bloody Butcher (Trillium recurvatum). Neither Gray nor the USDA PLANTS database places any wild populations of Trillium recurvatum anywhere in the Pittsburgh metropolitan area, or even within two hundred miles, but we have found it growing in Mount Lebanon. The Bloody Butcher is similar to the Toadshade (Trillium sessile), which also has mottled leaves and upright mahogany flowers; but the species name recurvatum points out the distinctive feature of this plant: the sepals that curve backward, and the petals that curve back in, making a little enclosed apartment to give the pollinators some privacy.

Smilax