Bogs and Acidic Peatlands of Southern New England by Marsha C. Salett
Triadenum virginicum (L.) Raf.
CLUSIACEAE (Mangosteen Family)
EtymologyTriadenum is in reference to the three central glands of the flower, from the Latin: tri = three + aden =gland; virginucum is Latin for from or of Virginia, in reference to The Virgin Queen, Elizabeth 1 of England (1533-1603).
DescriptionMarsh St. John's-wort is a slender, perennial herb that grows 1-2' tall. The whole plant has a purplish-pink cast from its reddish/purplish, unbranched stems to its purplish-green leaves to its pink or purple-pink flowers.
Wetland indicator statusOBL
Plant Height1-2 feet
LeavesOpposite, simple, entire, 1 -- 2 1/2" long; ovate to oblong, blunt tips, sessile (unstalked); purplish-green, dotted with translucent glands below.
Flower/InflorescencePink to flesh-colored to light purplish-pink, small (1/2-3/4"), 5 petals; in small clusters that are terminal or on stalks in upper leaf axils.
Flowering PeriodJuly-August
FruitTapered capsule, 3/4" long, deep red.
HabitatBogs, marsh, borders of ponds and streams.
RangeNova Scotia to Florida.
(c) 1998-2006 Marsha C. Salett