A New Hybrid of Serpocaulon (Polypodiaceae) from Costa Rica

  title={A New Hybrid of Serpocaulon (Polypodiaceae) from Costa Rica},
  author={Alexander Fco. Rojas-Alvarado and Jos{\'e} Miguel Chaves-Fallas},
Abstract A new hybrid Serpocaulon × sessilipinnum A. Rojas & J.M. Chaves is described. The new taxon has characters intermediate between S. fraxinifolium (Jacq.) A.R. Sm. and S. ptilorhizon (Christ) A.R. Sm., which are related mainly with leaf size, rhizome scales, shape and division of blade, shape and width of pinnae, number of areolae and sori series, and shape and color of spores. 
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