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Article
Published: 2018-02-02

Cyathea ruttenbergii, a new tree fern (Cyatheaceae, Polypodiopsida) from Puerto Rico

School for Field Studies, 100 Cummings Center, Suite 534-G, Beverly, MA 01915
Herbarium Department of Biology, University of Puerto Rico- Río Piedras, P.O. Box 23360, San Juan, PR 00931-3360
Antilles Caribbean tree ferns pteridophytes

Abstract

A new species, Cyathea ruttenbergii, is described from the Caribbean island of Puerto Rico. The new species differs from congeners by its large, lanceolate pinnules with wide sinuses and long attenuate apices, ovate lamina with 6–7 pinna pairs, bicolorous petiole scales, strongly armed petioles, and lack of indusium. The affinities and ecology of the species are discussed.