Flora Pittsburghensis

Wild flowers of Pittsburgh and western Pennsylvania


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St.-John’s-Wort (Hypericum perforatum)

Hypericum perforatumPhotographed June 19.

The thick wad of stamens in the middle of the flower is characteristic of St.-John’s-Worts, most of which also have bright yellow flowers. The lush growth of tidy opposite elliptical leaves makes this a handsome plant, and it carries its flowers proudly. These plants were growing between the railroad and Library Road in Castle Shannon, where they were blooming in the middle of June.

Hypericum perforatum

More at the full article.


Viper’s Bugloss (Echium vulgare)

Echium vulgarePhotographed June 19.

We have added two more pictures, in good even cloudy-day lighting, to our article on Echium vulgare.

Echium vulgare

White Clover (Trifolium repens)

Trifolium repens

It grows in every lawn, but unless you are obsessive about your grass, there is little to object to in this little weed. It is very easy to mow, it never grows very tall even without mowing, and it does the soil good. The flowers are frequently tinged with pink. The leaflets often have a pale crescent marked near the base, and of course an occasional leaf grows with four leaflets.

Trifolium repens

Birdfoot Trefoil (Lotus corniculatus)

Lotus corniculatusPhotographed June 13.

This is a plant that seems to be adapted above all to roadsides. It thrives in poor soil and can live happily in gravel, and it stays short enough to laugh at occasional mowing, though it would not survive a mower-obsessed suburbanite’s lawn. It is certainly one of our most decorative roadside weeds. The bright yellow flowers reward a close look: they have thin red stripes on the “standards,” the upper part of the flower.

Lotus corniculatusPhotographed June 13.

More at the full article.


Lesser Forget-Me-Not (Myosotis laxa)

Myosostis laxa

This is a miniature version of the common Forget-Me-Not (M. scorpioides), very similar except for the size. It is normally found near streams, but it seems to be more and more common in the city. These plants were blooming in Seldom Seen near the Seldom Seen Arch.

Myosotis laxa

More at the full article.


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