Bogs and Acidic Peatlands of Southern New England by Marsha C. Salett
Hypericum canadense L.
CLUSIACEAE (Mangosteen Family)
EtymologyHypericum is derived from the ancient Greek word for St. Johnswort, hypereikon: hyper= above and eikon = picture, and so named because the flowers, which bloom in late June, were placed above images to ward off evil spirits at the ancient midsummer festival of Walpurgisnacht; canadense is Latin for from or of Canada.
DescriptionCanada St. John's-wort is a diminutive, annual (or perennial) herb that grows 4 -- 24" tall. It branches above the middle of its smooth, slender stem; tiny, yellow flowers are clustered at the tips of the branches.
Wetland indicator statusFACW
Plant Height4-24 inches
LeavesOpposite, simple, entire, 3/8 -1 1/2" long 3/16" wide; linear to narrowly oblanceolate; sessile (unstalked), 1-3 veins.
Flower/InflorescenceYellow, tiny (1/4"), 5 petals; in small clusters at tips of branches.
Flowering PeriodJuly-September
FruitCapsule, tiny (3/16 -1/4"), purplish-red, 3-parted.
HabitatPond and stream margins, wet meadows, sandy or muddy shores.
RangeNewfoundland and Quebec to Minnesota, south to Georgia and Alabama.
(c) 1998-2006 Marsha C. Salett