Under Construction

Ptisana purpurascens

Maarten Christenhusz
Containing group: Ptisana


Conservation plans have been proposed for Marattia purpurascens (Vriese & Harting 1853), an endemic of the isolated Ascension Island in the South Atlantic, where a single population remains. This population is now believed to be more stable than previously feared, but long-term threats to its survival do exist in the form of competition with introduced plant species and grazing by sheep (Gray et al. 2005).

Other Names for Ptisana purpurascens


Gray, A., Palembe, T., Stroud, S. (2005). The conservation of the endemic vascular flora of Ascension Island and threats from alien species. Oryx 39, pp. 449-453.

Vriese, W. H. de, and Harting, P. (1853). Monographie des Marattiacées. Arnz, Leiden & Dusseldorf.

About This Page

Maarten Christenhusz
The Natural History Museum, London, United Kingdom

Correspondence regarding this page should be directed to Maarten Christenhusz at

Page: Tree of Life Ptisana purpurascens. Authored by Maarten Christenhusz. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Christenhusz, Maarten. 2009. Ptisana purpurascens. Version 23 January 2009 (under construction). http://tolweb.org/Ptisana_purpurascens/56775/2009.01.23 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Leaf Page.

Each ToL leaf page provides a synopsis of the characteristics of a group of organisms representing a leaf at the tip of the Tree of Life. The major distinction between a leaf and a branch of the Tree of Life is that a leaf cannot generally be further subdivided into subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Ptisana purpurascens

Page Content

articles & notes



Explore Other Groups

random page

  go to the Tree of Life home page