1. Family: Polypodiaceae J.Presl & C.Presl
    1. Genus: Polystichum Roth
      1. Polystichum caryotideum (Wall. ex Hook. & Grev.) Diels

        This species is accepted, and its native range is Tropical & Subtropical Asia to Pacific.

    [FTEA]

    Dryopteridaceae, JP Roux, M Shaffer-Fehre, B Verdcourt. Flora of Tropical East Africa. 2007

    Type
    Type not designated
    Habit
    Terrestrial, epiphytic or lithophytic.
    Rhizomes
    Rhizome scales shiny dark brown, ovate, 8–13 × 2–3 mm, acuminate, pale centre, pale fimbriate margins Rhizome erect, to 6 cm high.
    Leaves
    Fronds tufted.
    Stipes
    Stipe with narrow adaxial and lateral grooves, 8–29 cm long, with pale brown scales 8–15 × 1.5–3 mm, irregularly fimbriate, denser on sterile fronds, less dense on fertile fronds.
    Leaf lamina
    Lamina dark green adaxially, pale greyish green below, coriaceous or thin, narrowly ovate or elliptic, 20–40 × 8–18 cm, 1-pinnate.
    Rachis
    Rachis abaxially with sparse fimbriate scales, denser around stalks of pinnae.
    Pinnae
    Pinnae 3–12 on each side of the rachis, irregularly rhomboid-falcate, 4.7–8.5 × 2–2.5 cm, base cuneate on basiscopic side with acroscopic side truncate and auriculate, apex up-turned, acuminate, blunt, margin finely denticulate or serrate particularly on acroscopic lobe; apical pinna triangular with unilateral basal lobe.
    Leaf veins
    Veins anastomosing regularly, forming 2–3 ± parallel zones of areoles, traversed by pinnate veins, on periphery free veinlets reach serrate points but not margin
    Sori
    Sori ± regularly positioned on acroscopic free branch in areole, soral lines approximately parallel to longitudinal axis of pinna, 0.3–2 mm in diameter; indusium an ephemeral dark rustred funnel-forming peltate stalk 0.25 mm, opening into highly dissected umbrella shape ± 1.8 mm in diameter; on dehiscing, peltate funnel-stalk detaches like plug from receptacle
    Spores
    Spores monolete, oval, 0.03 × 0.025 mm
    Figures
    Figure 9

    Images

    Distribution

    Native to:

    Assam, China North-Central, China South-Central, China Southeast, East Himalaya, Hawaii, Japan, Korea, Myanmar, Nepal, Pakistan, Taiwan, Tibet, Vietnam, West Himalaya

    Extinct in:

    Philippines

    Introduced into:

    Alabama, Louisiana

    Polystichum caryotideum (Wall. ex Hook. & Grev.) Diels appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Wallich, N. [Cat. no. 376], Nepal Aspidium caryotideum K001109919
    Wallich, N. [Cat. no. 376], Nepal Aspidium caryotideum K001109920
    May 1, 2013 Wallich, N. [376], Nepal Cyrtomium caryotideum K001040158
    May 1, 2013 Wallich, N. [376], Nepal Cyrtomium caryotideum K001040159

    First published in Nat. Pflanzenfam. 1 [4]. 194 (1899)

    Not accepted by

    • Roskov Y. & al. (eds.) (2018). World Ferns: Checklist of Ferns and Lycophytes of the World Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands. [Cited as Cyrtomium caryotideum.]

    Sources

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0