The list is also available in alphabetical
order.
The basis of this list is the “Check List of the Vascular Flora of Allegheny County, Pennsylvania,” published in Trillia in 1951. It includes plants known to grow within ten miles of Allegheny County. We know of no more recent comprehensive list. The arrangement is based on Gray’s Manual, the eighth edition, and we have followed that arrangement, while attempting to indicate where current classifications deviate from it.
The 1951 list is generally a very good guide, but the local flora has changed somewhat since it was published. For example, the orange Daylily (Hemerocallis fulva) is marked in the list as rare, though locally abundant; now it is ubiquitous. Japanese Knotweed was rare; now it is a plague. We have added, in their proper places according to Gray, the new species we have observed.
The goal of this site is eventually to have all these pages fully populated with their local species, each species illustrated with original photographs. Right now we’re about halfway there. Completing the list may take years.
Commelinaceae
(Spiderwort Family)
Liliaceae (Lily
Family).—Note that this family is broken into
multiple families and even different orders by current
botanists.
Cannabaceae or
Cannabinaceae (Hemp Family)
Santalaceae
(Sandalwood Family)
Aristolochiaceae
(Birthwort Family)
Polygonaceae
(Knotweed Family)
Chenopodiaceae
(Goosefoot Family)
Amaranthaceae
(Amaranth Family)
Phytolaccaceae
(Pokeweed Family)
Portulacaceae (Purslane Family)
Nymphaceae
(Water-Lily Family)
Ranunculaceae
(Buttercup Family)
Berberidaceae
(Barberry Family)
Menispermaceae
(Moonseed Family)
Magnoliaceae
(Magnolia Family)
Cruciferae or
Brassicaceae (Mustard Family)
Saxifragaceae
(Saxifrage Family)
Hamamelidaceae
(Witch-Hazel Family)
Leguminosae or Fabaceae (Pea Family)
Oxalidaceae
(Wood-Sorrel Family)
Simaroubaceae
(Quassia Family)
Polygalaceae
(Milkwort Family)
Limnanthaceae
(False-Mermaid Family)
Celastraceae (Staff-Tree Family)
Staphyleaceae
(Bladdernut Family)
Hippocastanaceae
(Horse-Chestnut Family)
Balsaminaceae
(Touch-Me-Not Family)
Vitaceae (Vine or Grape
Family)
Hypericaceae (St. John’s-Wort Family)
Lythraceae
(Loosestrife Family)
Onagraceae (Evening-Primrose Family)
Umbelliferae or Apiaceae (Parsley Family)
Pyrolaceae
(Wintergreen Family)
Asclepiadaceae
(Milkweed Family)
Convolvulaceae (Morning-Glory Family)
Hydrophyllaceae
(Waterleaf Family)
Boraginaceae
(Forget-Me-Not Family)
Labiatae or Lamiaceae (Mint Family)
Scrophulariaceae
(Figwort Family)
Bignoniaceae (Bignonia Family)
Orobanchaceae (Broomrape Family)
Plataginaceae (Plantain Family)
Rubiaceae (Bedstraw or Madder Family)
Caprifoliaceae (Honeysuckle Family)
Campanulaceae (Bellflower Family)
Compositae or
Asteraceae (Composite, Aster, or Daisy Family)