Hypericaceae Juss.
  • Gen. Pl. 254. 1789. (4 Aug 1789)
  • St. John’s Wort Family


Cite taxon page as 'WFO (2021): Hypericaceae Juss. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000292. Accessed on: 16 Oct 2021'

General Information

Herbs, annual or perennial, subshrubs, or shrubs [trees], glabrous or hairy, hairs simple [stellate to dendroid]. Leaves opposite [alternate or whorled], simple, estipulate, sessile, subsessile, pseudopetiolate, or petiolate; blade with pellucid glands and/or canals containing essential oils, margins entire [rarely gland-fringed], surfaces with black, reddish, or amber glands containing hypericin and pseudohypericin. Inflorescences terminal or axillary, cymose [thyrsoid] or solitary flowers. Flowers homostylous [heterostylous]; sepals persistent or deciduous, (3–)4–5, glanduliferous like leaves; petals persistent or deciduous, 3–5[–6], distinct, imbricate or contorted [decussate], orange, pink, or yellow, [white, red], sometimes green- or red-tinged, [sometimes with adaxial scale], glanduliferous; stamens persistent or deciduous, in 2 whorls, sometimes in fascicles, sometimes reduced to staminodes; filaments distinct or ± connate; anthers 2-locular, dehiscing longitudinally; ovary superior, 2–5-merous; placentation axile to parietal; ovules 1–2+ on each placenta, anatropous; styles 2–5, distinct or basally [to completely] connate, elongate; stigmas minute or ± expanded. Fruits capsular [baccate], dehiscence septicidal from apex [loculicidal]. Seeds sometimes carinate [winged or carunculate]; endosperm absent; embryo straight [curved]; cotyledons 25–40% of total embryo length.

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    Morphology

    Ovary of 3–5 (rarely 1) carpels, 1-celled or imperfectly or perfectly 2–5-celled; styles the same number as the carpels, slender, free or rarely somewhat united, with a terminal capitate to clavate stigma; ovules axile or pendulous, numerous and 2-seriate, or few or solitary

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    Leaves opposite or verticillate, rarely alternate, simple, entire or glandular-dentate, rarely coriaceous, usually thin and marked with translucent or black dots, rarely small and scale-like; stipules absent; indumentum when present often stellate and ferruginous

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    Herbs, shrubs or rarely trees or climbers, with a resinous juice

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    Sepals 4–5, imbricate

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    Seeds without endosperm; embryo straight or arcuate

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    Flowers terminal or rarely axillary, from solitary to cymosepaniculate or corymbose, usually yellow or white, hermaphrodite, actinomorphic

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    Fruit a septicidal or rarely loculicidal capsule, or a berry or drupe

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    Stamens numerous or rarely subdefinite, hypogynous, usually variously united into 3–5 or more bundles, rarely free; anthers 2-celled, opening by longitudinal slits

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    • 1
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    Petals 4–5, hypogynous, imbricate or contorted

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    • 1
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    Fruit a capsule, berry or drupe

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    Herbs, suffrutices, shrubs or trees, rarely climbers; juice resinous

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    Ovules numerous, few or solitary in each loculus, axile, ascending, rarely pendulous

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    Seeds without endosperm

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    • 2
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    Petals imbricate or contorted, white, yellow or variously marked or tinged red

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    • 2
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    Sepals imbricate, often glandular

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    • Source: [
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    Ovary 1–5-locular; styles usually free

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    • Source: [
    • 2
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    Stamens numerous, hypogynous, often united into bundles

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    • Source: [
    • 2
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    Leaves opposite, verticillate or alternate, simple, often gland-dotted; stipules absent; indumentum often stellate

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    Flowers regular, A5;

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    Inflorescence terminal, cymose-paniculate, or variously reduced to a single flower

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    Literature

    SELECTED REFERENCES Adams, W. P. 1973. Clusiaceae of the southeastern United States. J. Elisha Mitchell Sci. Soc. 89: 62–71. Gillett, J. M. and N. K. B. Robson. 1981. The St. John’s worts of Canada (Guttiferae). Publ. Bot. (Ottawa) 11: 1–40. Robson, N. K. B. 1977. Studies in the genus Hypericum L. (Guttiferae) 1. Infrageneric classification. Bull. Brit. Mus. (Nat. Hist.), Bot. 5: 283–355. Stevens, P. F. 2007b. Hypericaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 10+ vols. Berlin etc. Volume 9, pp. 194–210.

  • Provided by: [B].Flora of North America @ efloras.org
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    Other Local Names

    NameLanguageCountry
    St. John’s Wort Family

     Information From

    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • A
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C The Trustees of the Royal Botanic Gardens, Kew
    Hypericaceae
    • D CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).