A common weed imported from Asia, probably for its intensely blue flowers. These plants were growing by a wooden fence in Beechview.
For a description of the species, see the Commelina communis reference page.
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Dayflower (Commelina communis)
Photographed June 13. 
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Swamp Milkweed (Asclepias incarnata)
Photographed June 12. An exceptionally beautiful milkweed that likes damp areas, but easily adapts to drier conditions; these were blooming in an open field in Schenley Park.
For a description of the species, see the Asclepias incarnata reference page.
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Goutweed (Aegopodium podagraria)
Photographed June 12. A foreign invader that likes damp, shady spots, this plant can be found in abundance in the stream valleys in Schenley Park.
For a description of the species, see the Aegopodium podagraria reference page.
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Yarrow (Achillea millefolium)
Photographed June 12. Sometimes mistaken for Queen Anne’s Lace, to which it is not related; Yarrow is a composite, meaning that each of those little flowers in the bunch is itself a head of multiple flowers. This plant was blooming in an open field in Schenley Park.
For a description of the species, see the Achillea millefolium reference page.
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Alfalfa (Medicago sativa)
Photographed June 10. A common forage crop that often plants itself. The deep violet flowers in a loose clover-like head are distinctive. These plants were blooming on a bank by the street in Beechview.
