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Hypericum perforatum, commonly known as St John's wort (sometimes perforate St John's wort or common St John's wort), is a flowering plant in the family Hypericaceae.It is a perennial plant that grows up to 1 metre (3 ft 3 in) tall, with many yellow flowers that have clearly visible black glands around their edges, long stamens (male reproductive organs), and three pistils (female reproductive ...
The beetles Chrysolina quadrigemina, Chrysolina hyperici and the St. John's-wort root borer (Agrilus hyperici) feed on common St. John's-wort (H. perforatum) plants and have been used for biocontrol where the plant has become an invasive weed. [13] Hypericum species are the only known food plants of the caterpillar of the treble-bar, a species ...
The underside of the leaves is a blue-green color and in the fall, the leaves take on a purple color. [5] The flowers are 3–5 cm in diameter, a rich yellow, with five petals and numerous yellow stamens. Its flowers can be described as "rose-like" and tend to be single or in units of two or three, [4] flowering in June to September. [6]
Hypericum olympicum, commonly known as the Mount Olympus St. John's wort, [2] [Note 1] is a species of flowering plant in the family Hypericaceae found in the Balkans and Turkey and introduced to western Europe.
It is considered to be a medicinal plant. [4] Hypericum maculatum herb has been used in the traditional Austrian medicine internally as tea or oil extract, and externally as oil extract, ointment or cold maceration in ethanol for treatment of disorders of the skin, locomotor system, nervous system, gastrointestinal tract, respiratory tract, kidneys and urinary tract, cardiovascular system ...
Hypericum scouleri, known by the common name Scouler's St. John's wort in English, is a flowering species of plant from western North America. It grows in areas around streams and wetlands from Canada to the highlands of Mexico. It is sometimes mistaken for the invasive Perforate St John's wort from Eurasia.
Hypericum frondosum, the cedarglade St. Johnswort or golden St. John's wort, is a species of flowering plant in the St. John's wort family, Hypericaceae. [ 1 ] [ 2 ] [ 3 ] It is native to the central and southeastern United States in dry, rocky habitats.
Hypericum mutilum is a species of St. John's wort known by the common name dwarf St. John's wort. It is native to parts of North America and is present in other parts as an introduced species . It is an annual or perennial herb taking a multibranched erect form up to about 60 centimeters tall.