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Tag: St. John’s Wort

Wildflower Wednesday: Marsh St. Johnswort

Wildflower Wednesday: Marsh St. Johnswort

Mid-fall brings an end to most blooming flowers, with the exception of the hardiest asters and goldenrods. But it doesn’t bring an end to identification and study of these plants. Many herbaceous wildflowers retain identifiable aerial parts, such as distinctive seed heads, that allow reliable plant ID well past the last flowers.  Marsh St. Johnswort (Hypericum virginicum) is no exception. Growing to approximately 2 feet tall, marsh St. Johnswort typically blooms in July and August. But due to persistent seed…

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Common St. John’s Wort (Hypericum perforatum)

Common St. John’s Wort (Hypericum perforatum)

To me, one of the quintessential summer-blooming wildflowers is the common St. John’s wort. By, or shortly after the summer solstice, you should start to see its sunny yellow blossoms everywhere. Common St. John’s wort (Hypericum perforatum) can be distinguished from other Hypericum species by its five-petaled yellow flowers (with black dots on the margins) that are approximately 1-inch across, and its many branching stems, growing to a height of 1 to 3 feet, as well as its oblong oppositely…

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