Kendall County (IL) Forest Preserve District
Spotted St. John's Wort
Hypericum punctatum [C-value 4]
St. John's Wort family (Hypericaceae)
Blooms
mid-June -
mid-August
The native Spotted St. John's Wort is uncommon in our area. It prefers full or partial sun and moist to slightly moist rather lean soil. Habitats include black soil prairies, gravel prairies, open woodlands, savannas, woodland borders and roadsides. This perennial is up to 2½' tall, branching occasionally with opposite leaves up to 2½" long and 1" across with rounded tips. Scattered translucent dots are observable on the underside of the leaves. Its stems terminate in tight clusters of yellow flowers, each about ½" across with 5 petals and numerous yellow anthers on long styles.
Spotted St John's Wort at Pickerill/Pigott Forest Preserve July 1, 2013
Spotted St John's Wort at Pickerill/Pigott Forest Preserve July 13, 2013
Spotted St John's Wort foliage (note spots on leaf undersides) at Richard Young Forest Preserve July 2, 2013
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