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This genus is accepted, and its native range is W. Central Tropical Africa, Tropical & Subtropical Asia to Pacific, S. Mexico to S. Tropical America.
A specimen from Kew's Herbarium

[FTEA]

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

Vegetative Multiplication Rhizomes
Rhizome long- or short-creeping, rarely erect
Morphology Leaves
Fronds spaced. Blade in almost all species decompound, deltoid-pentagonal, finely divided as in Ctenitis, but differing in scales which resemble those of Tectaria and in thickened basiscopic margins on leaflets which form wings on the axes to which they are attached. Costae raised, veins free; ultimate leaflets with margins thickened and decurrent to join margins of groove of pinna-rachis, prominent costae of distal parts of pinnae decurrent to form raised band between thickened margins of groove
Morphology Leaves Stipes
Stipe with adaxial groove, linear aerophores along ridges bordering groove.
Morphology Leaves Pinnae
Lowest pair of primary pinnae strongly basiscopically produced, catadromous below, anadromous towards tip of blade.
Morphology Leaves Rachis
Main rachis bordered above by two prominent ridges, continuations of thickened leaf margins of pinnae; intervening broad shallow channel filled with ctenitoid hairs (short, articulated unbranched hairs).
Morphology Reproductive morphology Sori
Sori orbicular, indusia present or fugacious; sporangia lacking appendages but usually bearing glands on stalk; spores winged or with many obtuse protuberances
Note
In both species as well as in Megalastrum an additional acroscopic pinnule is inserted between the first two ± opposite pinnule pairs of the basal pinna. About 35 species, pantropical.

Native to:

Argentina Northeast, Bolivia, Brazil South, Brazil Southeast, Brazil West-Central, Cameroon, Chatham Is., China South-Central, Colombia, Cook Is., Costa Rica, Ecuador, Fiji, Gabon, Guyana, Hainan, India, Jawa, Kermadec Is., Lesser Sunda Is., Malaya, New Caledonia, New Guinea, New South Wales, New Zealand North, New Zealand South, Norfolk Is., Panamá, Paraguay, Peru, Philippines, Queensland, Samoa, Society Is., Sri Lanka, Sumatera, Taiwan, Vanuatu, Venezuela, Victoria

Lastreopsis Ching appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Edwards, P.J. [2458], Brazil K000957113
Edwards, P.J. [2458], Brazil K000957114
Edwards, P.J. [2458], Brazil K000957116
Edwards, P.J. [2458], Brazil K000957115
Edwards, P.J. [2458], Brazil K000957118
Edwards, P.J. [2458], Brazil K000957117

First published in Bull. Fan Mem. Inst. Biol., Bot. 8: 157 (1938)

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.

Literature

Flora of Tropical East Africa

  • Bull. Fan. Mem. Inst. Biol. 8, 4: 157 (1938);
  • Contr. New South Wales Nat. Herb. 3 (5): 249–339 (1965)
  • Polystichum § Parapolystichum (Keyserl.) C.Chr., Monogr. Dryopteris 2: 93 (1920)
  • Sunyatsenia 5: 239 (1940)

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

Herbarium Catalogue Specimens
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 2021. 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 2021. 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