We present a taxonomic revision of Cyathea, clade Hymenophyllopsis, a monophyletic group restricted to the tepuis of the Guiana Shield, a region in northern South America. We recognize fifteen species, including four newly described here: C. indefinita, C. minima, C. pseudoctenitoides, and C. tatei. The main diagnostic characters for the species are: rhizome (symmetry and scales), lamina division (pinnatisect to 5-pinnate), pinnae (congested or sparse, recurverd to ascending), scales and/or hairs of the rachis (shape, size, margins), as well as the shape and margin of the indusium (bivalvate or cyatheoid, entire to deeply lacerate). An identification key, descriptions, taxonomic comments, illustrations, and geographical distribution maps for all recognized taxa are provided.
How to translate text using browser tools
2 August 2019
Taxonomic Revision of Cyathea, Clade Hymenophyllopsis (Cyatheaceae)
Sebastião Maciel,
Regina Y. Hirai,
Jefferson Prado
ACCESS THE FULL ARTICLE
<
Previous Article
|
American Fern Journal
Vol. 109 • No. 2
April 2019
Vol. 109 • No. 2
April 2019
Cyatheales
Guiana Shield
Hymenophyllopsis
taxonomy
tepui