Hypericum quadrangulare

• Interesting Facts
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Description

Genus Hypericum

[Trees or] shrubs , subshrubs , or perennial herbs, glabrous or with simple hairs , with translucent ("pale") and often opaque , black or reddish ("dark") glands , laminar (immersed and sometimes abaxial ) and marginal or intramarginal . Leaves opposite [or whorled ], sessile or short petiolate , venation pinnate to palmate [or rarely dichotomous], margin entire or gland-fringed. Inflorescence cymose . Flowers bisexual , homostylous [or heterostylous], stellate or cupped. Sepals 5 and quincuncial or rarely 4 and decussate, unequal or equal, free or partly united . Petals (4 or) 5, contorted, golden to lemon yellow [or rarely white], abaxially sometimes tinged or veined red, persistent or deciduous after anthesis , usually asymmetric . Stamens in [4 or]5 fascicles, free and antipetalous , or some united to form apparently 4 or 3 fascicles with compound fascicle(s) antisepalous , or irregular and apparently not fasciculate, persistent or deciduous, each single fascicle with up to 70[-120] stamens; filaments slender, free from nearly base [or to 2/3 united] or apparently completely free; anthers small, dorsifixed or ± basifixed , dehiscing longitudinally, with gland on connective ; sterile fascicles (fasciclodes) absent [very rare]. Ovary 3-5-loculed with axile placentae or ± completely 1-loculed with (2 or) 3[-5] parietal placentae, each placenta with [2 or] few to many ovules; styles (2 or) 3-5, free or partly to completely united, ± slender; stigmas small or ± capitate. Fruit a septicidal capsule or rarely ± indehiscent, valves often with oil-containing vittae or vesicles . Seeds small, often carinate or narrowly unilaterally winged ; testa variously sculptured , not arillate [very rarely carunculate]; embryo slender, straight, with distinct slender cotyledons.

About 460 species: almost cosmopolitan except for arctic and desert areas and most of the lowland tropics; 64 species (33 endemic) in China.[1]

Physical Description

Landscaping

Care: Shear after flowering to encourage reblooming. Follow a regular watering schedule during the first growing season to establish an extensive root system . Feed regularly during the growing season with a general purpose fertilizer . Prune annually in late winter to promote vigorous new growth.

Biology

Growth

Culture: Space 18-36" apart. Likes cool areas.

Soil: Prefers organic soil. Needs well-drained soil. Good for dry soils.

Sunlight: Sun Exposure: Full sun to part shade.

Temperature: Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b. (map)

Taxonomy

Synonyms

Hypericum quadrangulum L.

Notes

Publishing author : Sm. Publication : Engl. Bot. t. 370; O. F. Muell. in Fl. Dan. t. 640

Similar Species

Members of the genus Hypericum

ZipcodeZoo has pages for 124 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

H. acutifolium (Sharpleaf St. Johnswort) · H. adpressum (Creeping St. Johnswort) · H. anagalloides (Tinker's Penny) · H. androsaemum (Sweet Amber) · H. androsaemum L. 'Gladys Brabazon' (Sweet Amber) · H. androsaemum 'Albury Purple' (Sweet Amber) · H. androsaemum 'Esm Cho' (Tutsan 'esm Cho') · H. androsaemum 'Esm Española' (Tutsan 'esm Espa) · H. androsaemum 'Esm Greli' (Tutsan 'esm Greli') · H. androsaemum 'Esm Kalua' (Tutsan 'esm Kalua') · H. androsaemum 'Esm Ora' (Tutsan 'esm Ora') · H. androsaemum 'Esm Pin' (Tutsan 'esm Pin') · H. androsaemum 'Esm Re' (Tutsan 'esm Re') · H. androsaemum 'Esm Wet' (Tutsan 'esm Wet') · H. androsaemum 'Glacier' (Sweet Amber) · H. androsaemum 'Glob Dr205' (Tutsan 'glob Dr205') · H. androsaemum 'Glob Lp208' (Tutsan 'glob Lp208') · H. androsaemum 'Golden Tutsan' (Golden Tutsan St. John's Wort) · H. androsaemum 'Verpeacla' (Tutsan 'verpeacla') · H. ascyron (Great St. Johnswort) · H. ascyron gebleri (Great St. Johnswort) · H. boreale (Northern St. Johnswort) · H. brachyphyllum (Coastalplain St. Johnswort) · H. brathys (St. Johnswort) · H. buckleii (Buckley's St. Johnswort) · H. calcycinum (St. John's Wort) · H. calycinum (Aaron's Beard) · H. calycinum 'Brigadoon' (Aaron's Beard) · H. canadense (Lesser Canadian St. Johnswort) · H. canadense boreale (Lesser Canadian St. Johnswort) · H. canariense (Canary Island St. Johnswort) · H. cerastoides (Hypericum) · H. chapmanii (Apalachicola St. Johnswort) · H. cistifolium (Round-Pod St John´s-Wort) · H. concinnum (Goldwire) · H. crux-andreae (Atlantic St. Peter's-Wort) · H. cumulicola (Highlands Scrub Hypericum) · H. densiflorum (Bushy St. Johnswort) · H. denticulatum (Coppery St. Johnswort) · H. diosmoides (Puerto Rico St. Johnswort) · H. dissimulatum (Disguised St. Johnswort) · H. dolabriforme (Straggling St. Johnswort) · H. drummondii (Nits and Lice) · H. edisonianum (Edison Ascyrum) · H. ellipticum (Pale St. Johnswort) · H. elodes (Marsh Hypericum) · H. exile (Florida Sands St. Johnswort) · H. fasciculatum (Peelbark St. Johnswort) · H. forrestii (Forrests St. Johns Wort) · H. fortuneana 'Purple Fountain' (St. Johns Wort) · H. frondosum (Golden St John´s-Wort) · H. frondosum 'Sunburst' (Cedarglade St. John's Wort) · H. galioides (Bedstraw St. Johnswort) · H. gentianoides (Orangegrass) · H. gramineum (Small St John´s-Wort) · H. graveolens (Mountain St. Johnswort) · H. gymnanthum (Claspingleaf St. Johnswort) · H. harperi (Sharplobe St. Johnswort) · H. hookerianum (Hookers St. Johnswort) · H. humifusum (Trailing St John´s-Wort) · H. humifusum suborbiculatum (Trailing St. Johnswort) · H. hypericoides (Reclining St Andrew's Cross) · H. hypericoides hypericoides (St Andrews Cross) · H. hypericoides multicaule (St. Andrew's Cross) · H. hypericoides subsp. multicaule (St. Andrew's Cross) · H. japonicum (Matted St. Johns Wort) · H. kalmianum (Kalm´s St John´s-Wort) · H. kelleri (Hypericum) · H. lancasteri (Lancasters St. Johns Wort) · H. laricifolium (St. Johns Wort) · H. lissophloeus (Smoothbark St. Johnswort) · H. lloydii (Sandhill St. Johnswort) · H. lobocarpum (Fivelobe St. Johnswort) · H. majus (Large St Johnswort) · H. microsepalum (Flatwoods St. Johnswort) · H. mitchellianum (Blue Ridge St. Johnswort) · H. moseranum 'Tri-Color' (Gold Flower) · H. moserianum (St. Johnswort) · H. multicaule (St. Andrew's Cross) · H. mutilum (Dwarf St Johnswort) · H. myrtifolium (Myrtleleaf St. Johnswort) · H. nitidum (Carolina St. Johnswort) · H. nudiflorum (Early St. Johnswort) · H. oblongifolium (St. Johnswort) · H. olympicum f. minus 'Variegatum' (St. Johns Wort) · H. parvulum (Sierra Madre St. Johnswort) · H. patulum Thunb. 'Sungold' (St. Johns Wort) · H. patulum 'Hidcote' (Hidcote Hypericum) · H. patulum 'Variegatum' (St. Johns Wort) · H. pauciflorum (Fewflower St. Johnswort) · H. perforatum (Common St Johnswort) · H. perforatum chinense (Common St Johnswort) · H. polyphyllum (Rockery St. Johns Wort) · H. prolificum (Cinnamon Stick) · H. pseudomaculatum (False Spotted St. Johnswort) · H. pulchrum (Slender St. Johns Wort) · H. punctatum (Spotted St Johnswort) · H. reductum (St Johns Wort) · H. reptans (Creeping St. John's Wort) · H. revolutum keniense (Forest-Primrose)

More Info

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Further Reading

• A catalogue of the phaenogamous plants of Great Britain: arranged according to the natural orders: with a copious list of synonyms carefully compiled from Steudel's Nomenclator botanicus, Smith's English flora, Hookers's British flora, Lindley's Synopsis, by Henry Ibbotson. London: H. Bailliere, 1848. url p. 25.
• A natural arrangement of British plants: according to their relations to each other as pointed out by Jussieu, De Candolle, Brown, &c.. .. / with an introduction to botany. .. By Samuel Frederick Gray. .. London: Baldwin, Cradock, and Joy, 1821. url p. 248, p. 55, p. 633.
• A new London flora; or, Handbook to the botanical localities of the metropolitan districts. Compiled from the latest authorities, and from personal observations. London, Hardwick and Bogue, 1877. url p. 32.
• Bulletin of the Natural History Museum. London: The Natural History Museum, c1993-2002. url p. 80.
• Elements of the philosophy of plants: containing the principles of scientific botany. .. with a history of the science, and practical illustrations. By A. P. de Candolle and K. Sprengel. Tr. from the German. Edinburgh, W. Blackwood, 1821. url p. 416.
• Introduction to botany, containing an explanation of the theory of that science, extracted from the works of Linnaeus, ed. by C. Stewart. Edinburgh, Bell, 1811. url p. 293.
• Journal of botany: being a second series of the Botanical miscellany. 1 1834 London: Longman, Rees, Orme, Brown, Green & Longman; Edinburgh: A. & C. Black, 1834-1842. url p. 22.
• On the popular names of British plants, being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species. By R. C. A. Prior. London: Williams and Norgate, 1870. url p. 100.
• Plant lore, legends, and lyrics. Embracing the myths, traditions, superstitions, and folk-lore of the plant kingdom. By Richard Folkard, jun. London, S. Low, Marston, Searle, and Rivington, 1884. url p. 54.
• The Annals of Scottish natural history. Edinburgh: David Douglas, 1892-1911. url p. 241.
• The Entomologist's monthly magazine. Oxford [etc.]Entomologist's Monthly Magazine Ltd. [etc.] url p. 80.
• The flora of Oxfordshire and its contiguous counties: (comprising the flowering plants only;) arranged in easy and familiar language according to the Linnaean and natural systems; preceded by an introduction to botany / Oxford: H. Slatter, 1833. url p. 218, p. 218.
• Tracts relative to botany, tr. from different languages. Illustrated by nine copper plates, and occasional remarks. London, Printed by Phillips and Fardon [etc.]1805. url p. 52.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 31, 2012.

Identifiers

• Biodiversity Heritage Library NamebankID: 10606722
• Globally Unique Identifier: urn:lsid:ipni.org:names:433776-1
• International Plant Names Index (IPNI) ID: 1061697-1
• Zipcode Zoo Species Identifier: 1234452

Footnotes

1. Xi-wen Li & Norman K. B. Robson "Hypericum". in Flora of China Vol. 13 Page 1, 2. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.