Skip to main content
Article thumbnail
Location of Repository

The <i>Cheilanthes hirta</i> complex and allied species (Adiantaceae/Pteri­daceae) in southern Africa

By W. B. G. Jacobsen and N. H. G Jacobson

Abstract

<p>The very variable complex of plants until now ascribed to <em>Cheilanthes hirta</em> Swartz, together with some derived or allied species, is investigated. The type of the species as established by N. C. Anthony (1984), is accepted. Three new varieties are distinguished: Cheilanthes hirta Swartz var. <strong>brevipilosa</strong> W. &amp; N. Jacobsen, var. inferacampestris W. &amp; N.Jacobsen and var. <strong>nemorosa</strong> W. &amp; N. Jacobsen. One new form of <em>Cheilanthes hirta</em> var. <strong>brevipilosa</strong> W. &amp; N. Jacobsen is recognized: forma <strong>waterbergensis </strong>W. &amp; N. Jacobsen. Var.  <strong>laxa </strong>Kunze (1836) is given the new status of forma:  <em>Chei­lanthes hirta</em> var. <strong>brevipilosa</strong> W. &amp; N. Jacobsen forma <strong>laxa</strong> (Kunze) W. &amp; N. Jacobsen. Three allied species are discussed and included in the key to all taxa mentioned. Taxa are described and information given includes notes on distribution and ecology. Special attention is paid to spore morphology. Most taxa are illustrated by a habit photo, and all by line drawings and scanning electron micrographs (SEM) of the spores. Possible evolutionary conclusions, particularly on the nature of the spores and on frond dimensions in relation to geographical distribution and climate are discussed.</p

Topics: Adiantaceae, <i>Cheilanthes hirta</i> Swartz complex, evolution, key, phytogeography, Pteridaceae, southern Africa, spore morphology, General. Including nature conservation, geographical distribution, QH1-199.5
Publisher: AOSIS
Year: 1988
DOI identifier: 10.4102/abc.v18i1.982
OAI identifier: oai:doaj.org/article:e63e3cd5b56942a4a461b4bbdee39ddf
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/2311-9284 (external link)
  • https://doaj.org/toc/0006-8241 (external link)
  • https://doaj.org/article/e63e3... (external link)
  • https://abcjournal.org/index.p... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.