Polypodiaceae
Cyrtomium

Cyrtomium caryotideum (Wall. ex Hook. & Grev.) C.Presl

First published in Tent. Pterid.: 86 (1836)
This species is accepted
The native range of this species is Pakistan to Temp. E. Asia and Philippines, Hawaiian Islands. It is a perennial and grows primarily in the temperate biome.

Descriptions

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

Type
Type not designated
Morphology General Habit
Terrestrial, epiphytic or lithophytic.
Vegetative Multiplication Rhizomes
Rhizome scales shiny dark brown, ovate, 8–13 × 2–3 mm, acuminate, pale centre, pale fimbriate margins Rhizome erect, to 6 cm high.
Morphology Leaves
Fronds tufted.
Morphology Leaves 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.
Morphology Leaves Leaf lamina
Lamina dark green adaxially, pale greyish green below, coriaceous or thin, narrowly ovate or elliptic, 20–40 × 8–18 cm, 1-pinnate.
Morphology Leaves Rachis
Rachis abaxially with sparse fimbriate scales, denser around stalks of pinnae.
Morphology Leaves 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.
Morphology Leaves 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
Morphology Reproductive morphology 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
Morphology Reproductive morphology Spores
Spores monolete, oval, 0.03 × 0.025 mm
Figures
Figure 9
[FTEA]

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 Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Science Photographs

    • Copyright applied to individual images