1. Family: Berberidaceae Juss.
    1. Genus: Epimedium Tourn. ex L.
      1. Epimedium flavum Stearn

        More species of Epimedium grow in China at elevations between 500 m and 3,700 m in the woodlands of Sichuan Province in than in any other region. One of these, Epimedium flavum was first collected there in 1992 and named in 1995 by the British botanist William Stearn. Two other yellow-flowered species from the same area are similar: E. davidii (with smaller, red inner sepals, usually larger leaves and compact rhizome) and E. fangii (pale reddish inner sepals and creeping rhizomes).

    [KSP]
    General Description
    Epimedium flavum is a herbaceous perennial with upright stems and bright yellow flowers, produced mainly in spring.

    More species of Epimedium grow in China at elevations between 500 m and 3,700 m in the woodlands of Sichuan Province in than in any other region. One of these, Epimedium flavum was first collected there in 1992 and named in 1995 by the British botanist William Stearn. Two other yellow-flowered species from the same area are similar: E. davidii (with smaller, red inner sepals, usually larger leaves and compact rhizome) and E. fangii (pale reddish inner sepals and creeping rhizomes).

    William Stearn named Epimedium flavum and many other species of Epimedium and wrote the monograph, The Genus Epimedium and other Herbaceous Berberidaceae, published by the Royal Botanic Gardens, Kew in 2002.

    Species Profile

    Geography and distribution

    Epimedium flavum is found in Sichuan Province (Tianquan Xian, on the eastern side of Erlang Shan), central China, at elevations of 1,800–2,000 m.

    Description

    Overview:  Epimedium flavum has a compact rhizome and forms dense clumps, reaching up to 30 cm tall.

    Leaves: The leaves have five (sometimes three) leaflets. The leaflets are heart-shaped, rounded and have sharp teeth around the margin.

    Flowers: It has 3–10 sulphur-yellow, long-spurred flowers on upright stems. The flowers are around 3 cm across and have four inner sepals 11 mm long with rounded petals and slightly curved, spreading spurs.

    Threats and conservation

    Epimedium flavum is included on the IUCN Red List of Threatened Species as Vulnerable (VU D2). Species listed as VU D2 face a high risk of extinction because of their limited distribution (ie restricted area of occurrence or small number of locations) and are vulnerable to the effects of human activities or random disasters. They may therefore become Critically Endangered or even Extinct in the short term.

    Uses

    Epimedium flavum is grown as an ornamental.

    This species at Kew

    Epimedium flavum is growing in the Woodland Garden.

    Pressed and dried, and alcohol-preserved specimens of Epimedium flavum are held in Kew’s Herbarium, where they are available to researchers from around the world by appointment. The details of some of these specimens can be seen online in the Herbarium Catalogue.

    Distribution
    China
    Ecology
    Montane woodland.
    Conservation
    Vulnerable (VU) according to IUCN Red List criteria.
    Hazards

    None known.

    Images

    Distribution

    Found In:

    China South-Central

    Common Names

    English
    Barrenwort

    Epimedium flavum Stearn appears in other Kew resources:

    Date Identified Reference Herbarium Specimen Type Status
    Feb 1, 1995 Ogisu, M. [92036], China K000340087 holotype
    Feb 1, 1995 Ogisu, M. [92036], China K000340088 holotype
    Ogisu, M. [92036] 73669.000

    First published in Bot. Mag. 12: 21 (1995)

    Accepted in:

    • [5] Govaerts, R. (2001) World Checklist of Seed Plants Database in ACCESS E-F: 1-50919

    Literature

    • [1] Ying Junsheng, Boufford, D. E. & Brach, A. R. (2011). Epimedium. In: Flora of China. Vol. 19, eds Wu Zhengyi, Raven, P. H. & Hong Deyuan. Science Press, Beijing & Missouri Botanical Garden Press, St Louis.
    • [2] The Plant List (2010). Epimedium flavum.
    • [3] China Plant Specialist Group (2004). Epimedium flavum. In: IUCN Red List of Threatened Species. Version 2011.1, IUCN 2011.
    • [4] Stearn, W. T. (2002). The Genus Epimedium: and other Herbaceous Berberidaceae. Royal Botanic Gardens, Kew.
    • [6] Stearn, W. T. (1995). New Chinese taxa of Epimedium (Berberidaceae) from Sichuan. Curtis’s Botanical Magazine 12: 15-25.

    Sources

    International Plant Names Index
    The International Plant Names Index (2016). Published on the Internet http://www.ipni.org
    [A] © Copyright 2016 International Plant Names Index. https://creativecommons.org/licenses/by/3.0

    Kew Species Profiles
    Kew Species Profiles
    [B] http://creativecommons.org/licenses/by-nc-sa/3.0
    [C]

    World Checklist of Selected Plant Families
    World Checklist of Selected Plant Families(2016). Published on the Internet http://apps.kew.org/wcsp/
    [D] See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement. http://creativecommons.org/licenses/by-nc-sa/3.0
    [E] © Copyright 2016 International Plant Names Index and World Checkist of Selected Plant Families. https://creativecommons.org/licenses/by/3.0