This wildflower resembles a dwarf version of the better-known Hypericum spp. (St. John's Wort species). Other small-flowered Hypericum spp. (flowers 1/3" across or less) usually have more narrow leaves and therefore are easily distinguished from Dwarf St. John's Wort. An exception is Hypericum boreale (Northern St. John's Wort), which is rare in Illinois. Generally, Northern St. John's Wort can be distinguished from Dwarf St. John's Wort and other small-flowered species in this genus by its leafy floral bracts, which resemble small leaves. It also has purple seed capsules that are as long or longer than its sepals. Dwarf St. John's Wort, in contrast, has tiny scale-like floral bracts and its seed capsules usually remain green for a longer period of time.
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