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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 ...
Hypericaceae is a plant family in the order Malpighiales, comprising six to nine genera and up to 700 species, and commonly known as the St. John's wort family. Members are found throughout the world apart from extremely cold or dry habitats. Hypericum and Triadenum occur in temperate regions but other genera are mostly tropical.
Hypericum tetrapterum is a rhizomatous, glabrous perennial plant growing up to 1.2 m (3 ft 11 in) in height. [1] [2]: 340 The stems are square in cross section, with conspicuous wings at the corners.
Hypericum yezoense [a], the Yezo St John's wort, is a species of flowering plant in the St John's wort family Hypericaceae. Native to Japan, Sakhalin, and the Kurils, the plant can be found among rocks and in grasslands. It is a perennial herb with many stems and small flower clusters.
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 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 has a diploid number of 14 or 16.
Hypericum densiflorum, also known as bushy St. John's wort or dense St. John's wort, is a perennial herb in the flowering plant family Hypericaceae native to North America. The specific epithet densiflorum is Latin , meaning "densely flowered", referring to the many-flowered cymes .
Hypericum virginicum, the marsh St. Johns-wort [2] or Virginia marsh St. Johnswort, [3] is a species of flowering plant in the family Hypericaceae. [1] It is native to the central and eastern United States and eastern Canada.