19 June 2022

Wildflowers bloom in two spurts in southwestern Pennsylvania: Woodland wildflowers in April before leaf out, “field” flowers in July-August after the solstice.

May and June are practically flowerless except for a few non-natives blooming in Schenley Park last week. Some are invasive. They thrive because deer don’t eat them.

• Chicory (Cichorium intybus)
• Greater celandine (Chelidonium majus), invasive
• Canada thistle (Cirsium arvense), invasive
• Goutweed a.k.a. bishop-weed (Aegopodium podagraria), invasive

(photos by Kate St. John)