St. John's wort
Botanical name: Hypericaceae
St. John's wort
Botanical name: Hypericaceae
Species of St. John's wort
St. John's worts
St. John's worts are a diverse group of flowering plants, and all of these species are commonly referred to by the genus's common name. Many species in this group are considered noxious weeds or invasive. They are named after the 16th-century martyr St. John because of the red secretions that are exuded when the plants are crushed or damaged.
Cratoxylum
Cratoxylum species grow as shrubs or small to medium-sized trees. The bark drying black produces a yellow resinous sap. The flowers are white or pink to crimson. The ellipsoid fruits consist of three valves. Cratoxylum is native to tropical Asia. Cratoxylum species grow naturally from India through southern China to Malesia. As of spring 2014 The Plant List recognises 9 accepted taxa (of species and infraspecific names).
Harungana
Psorospermum
Vismia
Members of the genus vismia are small trees and shrubs found in tropical and subtropical areas of Africa, Central America, and South America.
Marsh St. John's wort
Marsh St. John's wort are a small group of flowering plants characterized by the opposite, rounded leaves, pinkish or flesh-colored flowers with five petals and nine stamens, and the preference for wetland habitats. They are usually found on the edges or shores of water bodies. Because of this strong habitat preference, they can be useful in ecology as wetland indicators.
Scientific Classification
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