Kendall County (IL) Forest Preserve District
Blue
Vervain (Swamp Verbena)
Verbena hastata
[C-value
4]
Vervain Family (Verbenaceae)
Blooms July
-
mid-September
The beautiful native Blue Vervain is common in our area. It prefers full to partial sunlight and moist soil or wet muck. Habitats include moist meadows, soggy thickets, marshes and borders of rivers and ponds. It is a slender, erect, square-stemmed branching perennial, up to 5' tall, with opposite, conspicuously veined, toothed, lance-shaped leaves up to 6" long and 1" across. The upper stems terminate in panicles of flowering spikes up to 1' long and 6" across. Individual floral spikes are up to 5" long and densely crowded with ascending rings of tubular, 5-lobed blue-violet blossoms up to ¼" long.
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Blue Vervain at Hoover Forest Preserve July 20, 2015
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Blue Vervain foliage at Hoover Forest Preserve July 20, 2015
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Blue Vervain colony at Hoover Forest Preserve July 20, 2015
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Blue Vervain at Harris Forest Preserve August 15, 2013
Blue Vervain fall seedheads near Pickerill/Pigott Forest Preserve October 29, 2014
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