World Library  
Flag as Inappropriate
Email this Article

Lygodium

Article Id: WHEBN0000483203
Reproduction Date:

Title: Lygodium  
Author: World Heritage Encyclopedia
Language: English
Subject: Vine, Fern, List of garden plants
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Lygodium

Lygodium
Lygodium japonicum
Scientific classification
Kingdom: Plantae
Division: Pteridophyta
Class: Polypodiopsida /
 Pteridopsida (disputed)
Order: Schizaeales
Family: Lygodiaceae
C.Presl
Genus: Lygodium
Sw.
Species

See text

Lygodium (climbing fern) is a genus of about 40 species of ferns, native to tropical regions across the world, with a few temperate species in eastern Asia and eastern North America. It is the sole genus in the family Lygodiaceae, though included in the family Schizaeaceae by some botanists.

They are unusual in that the rachis, or midrib, of the frond is thin, flexible, and long, the frond unrolling with indeterminate growth and the rachis twining around supports, so that each frond forms a distinct vine. The fronds may be from 3-12 m long, depending on the species.

Some Lygodium species are now considered very problematic invasive weeds in the southeastern United States. Populations of Lygodium have increased more than 12-fold over the past decade, as noted by Florida's Institute of Food and Agricultural Sciences.[1]

Japanese climbing fern (Lygodium japonicum) was added to the Florida Noxious Weed List in 1999. It is also a major problem in pine plantations, causing contamination and harvesting problems for the pine straw industry. Old World climbing fern (Lygodium microphyllum) infests cypress swamps and other hydric sites, forming a monoculture. This massive infestation displaces all native flora and fauna, completely changing the ecosystem of the area.[2]

Plants in this genus have basal chromosome counts of n=28, 29, 30.

Extracts

The aqueous ethanol extract of spores of Lygodium japonicum showed fatty acids oleic acid, linoleic acid and palmitic acid were identified as the main active principles inhibiting testosterone 5α-reductase.[3]

Selected species

References and External Links

  1. ^ "SS-AGR-21/AG122: Natural Area Weeds: Old World Climbing Fern (Lygodium microphyllum)". Edis.ifas.ufl.edu. Retrieved 2014-07-15. 
  2. ^ "Japanese climbing fern—Lygodium japonicum | Center for Aquatic and Invasive Plants". Plants.ifas.ufl.edu. Retrieved 2014-07-15. 
  3. ^ Matsuda H., Yamazaki M., Naruto S., Asanuma Y., Kubo M. (2002). "Anti-androgenic and hair growth promoting activities of Lygodii Spora (spore of Lygodium japonicum) I. Active constituents inhibiting testosterone 5α-reductase". Biological and Pharmaceutical Bulletin 25 (5): 622–626.  
  4. ^ "Flora of New Zealand | General Profile | Lygodium articulatum". Nzflora.info. Retrieved 2014-07-15. 
  • LygodiumFlora of North America:
  • "Lygodium Sw.".  
  • C.Michael Hogan. 2010. . Encyclopedia of Earth. eds. Saikat Basu and C.Cleveland. National Council for Science and the EnvironmentFern. Washington DC.
  • species listLygodiumFlora of China:
  • )Lygodium japonicumSpecies Profile- Japanese Climbing Fern (, National Invasive Species Information Center, United States National Agricultural Library. Lists general information and resources for Japanese Climbing Fern.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.