Hypericum or St. John's wort.
Hypericum /ˌhaɪˈpɪərɨkəm/[1] is a genus of 490[2] species of flowering plants in the family Hypericaceae (formerly often considered a subfamily of Clusiaceae). Hypericum is unusual for a genus of its size because a worldwide taxonomic monograph[2] was produced for it by (working at the Natural History Museum, London, UK, between 1977 and 2012). Robson recognizes 36 sections within Hypericum. The genus has a nearly worldwide distribution, missing only from tropical lowlands, deserts and polar regions. All members of the genus may be referred to as St. John's wort, though they are also commonly just called hypericum, and some are known as tutsan. The marsh St. John's-worts are nowadays separated into the genus Triadenum. Hypericums vary from herbaceous annual or perennials 5–10 cm tall to shrubs and small trees up to 12 m tall. The leaves are opposite, simple oval, 1–8 cm long, either deciduous or evergreen. The flowers vary from pale to dark yellow, and from –6 cm in diameter, with five (rarely four) petals, most having prominent stamens. The fruit is usually a dry capsule which splits to release the numerous small seeds; in some species it is fleshy and berry-like. Some species are used as ornamental plants and have large, showy flowers. Numerous hybrids and cultivars have been developed for use in horticulture, such as H. × moserianum[3] (H. calycinum × H. patulum), H. 'Hidcote'[4] and H. 'Rowallane'.[5] All of the above cultivars have gained the Royal Horticultural Society's Award of Garden Merit. read more :
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Keywords: blossom, calycinum, flower, flowering, garden, hobby, hypericum, johns, lugris2, st., wort
