FIGURE 2 in Cyathea ruttenbergii, a new tree fern (Cyatheaceae, Polypodiopsida) from Puerto Rico

FIGURE 2. Field characters of Cyathea ruttenbergii and similar species. A. Cyathea ruttenbergii, fertile frond, adaxially (Luquillo Mountains, Rio Grande, Puerto Rico). B. Cyathea pungens, fertile frond, adaxially (Pilcopata, Cusco, Peru). C. Cyathea borinquena, fertile frond, adaxially (Luquillo Mountains, Rio Grande, Puerto Rico). D. Cyathea ruttenbergii, trunk apex. E. Cyathea pungens, trunk apex. F. Cyathea borinquena, trunk apex. G. Cyathea ruttenbergii, petiole. H. Cyathea pungens, petiole. I. Cyathea borinquena, petiole. All photos by A. Tejedor.