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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 ...
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.
Chrysolina hyperici is most often known in English by the common names "St. Johnswort Beetle", "Saint John's Wort Beetle" or close variations. [3] In the United States C. hyperici is also known by the common name "klamathweed beetle" from one of the common names of Hypericum perforatum.
Hypericum punctatum, the spotted St. John's wort, is a perennial herb native to North America. [2] The yellow-flowered herb occurs throughout eastern North America into southern Canada . The process of microsporogenesis carried out by this plant is prone to errors in chromosomal segregation .
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 ...
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 kalmianum, commonly called Kalm's St. Johns wort [2] or Kalm's St. Johnswort, [3] is a flowering plant in the St. John's wort family Hypericaceae. It is native to the Great Lakes region in the northern United States and southern Canada. Hypericum kalmianum was named after its discoverer, Swedish botanist Pehr Kalm (1715-1779). [2]