St. Johnswort or Mangosteen


(Guttiferae or Clusiaceae)

Depending on the source, the name of the family differs. In the Manual of Vascular Plants of Northeastern United States and Adjacent Canada Second Edition, by Henry A. Gleason and Arthur Cronquist the family is called Mangosteen, whereas Peterson's Field Guide of Wildflowers in the northeastern North America, by Roger Tory Peterson and Margaret Mckenny call it St. Johnswort. In either case, flowers of this family have either 4 or 5 petals depending on the genus to which the flower belongs. The more common genus have 5 petals, grow in clusters, and generally yellow, (some are pink). There are many stamens that clumped together and surround a capsule. The most notworthy characteristic of flowers in this family are the dark or translucent dots or glands that are on the leaves. The leaves are oppsite and untoothed. There are about 30 species that grow in this area.
Common St. Johnswort
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