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Alansmia, a new genus of grammitid ferns (Polypodiaceae) segregated from Terpsichore

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Abstract

Alansmia, a new genus of grammitid ferns is described and combinations are made for the 26 species known to belong to it. Alansmia is supported by five morphological synapomorphies: setae present on the rhizomes, cells of the rhizome scales turgid, both surfaces of the rhizome scales ciliate, laminae membranaceous, and sporangial capsules setose. Other diagnostic characters include pendent fronds with indeterminate growth, concolorous, orange to castaneous rhizome scales with ciliate or sometimes glandular margins, hydathodes often cretaceous, and setae simple, paired or stellate. The group also exhibits the uncommon characteristic of producing both trilete and apparently monolete spores, sometimes on the same plant. New combinations are made for Alansmia alfaroi, A. bradeana, A. canescens, A. concinna, A. contacta, A. cultrata, A. dependens, A. diaphana, A. elastica, A. glandulifera, A. heteromorpha, A. immixta, A. kirkii, A. lanigera, A. laxa, A. longa, A. monosora, A. reclinata, A. semilunaris, A. senilis, A. smithii, A. spathulata, A. stella var. stella, A. stella var. flava, A. turrialbae, A. variabilis, A. xanthotrichia. Lectotypifications are made for Alansmia concina, A. variabilis, Polypodium ciliare, P. flexile, and P. ovalescens. The genus is named in honor of pteridologist Alan R. Smith.

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Acknowledgments

We thank Alan R. Smith for his unconditional support of our pteridological studies. Kessler’s research was supported by the German Research Association (DFG), Labiak’s research by a grant from the Brazilian CNPq (PED 201782/2008-1), and Sundue’s research by a grant from the United States National Science Foundation (NSF) (in the name of Dr. Robbin C. Moran, DEB 0717056). We thank two anonymous reviewers for their valuable comments, Patricia Eckel for revising the Latin diagnosis, and Mr. Haruto Fukuda for providing the line art illustration as well as John Mickel for allowing us to reproduce it here.

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  1. Ana Laura Moguel Velázquez

    Present address: , Pfefferackerstr. 22, 45894, Gelsenkirchen, Germany

Authors and Affiliations

  1. Systematic Botany, University of Zurich, Zollikerstrasse 107, CH-8008, Zurich, Switzerland

    Michael Kessler

  2. Department of Systematic Botany, Albrecht-von-Haller-Institute of Plant Sciences, Georg-August-University, Untere Karspüle 2, 37073, Göttingen, Germany

    Ana Laura Moguel Velázquez

  3. The New York Botanical Garden, 200th St. and Southern Blvd., Bronx, NY, 10458, USA

    Michael Sundue

  4. Departamento de Botânica, Universidade Federal do Paraná, Caixa Postal 19031, 81531-980, Curitiba, PR, Brazil

    Paulo H. Labiak

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  1. Michael Kessler
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  2. Ana Laura Moguel Velázquez
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  4. Paulo H. Labiak
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Correspondence to Michael Kessler.

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Kessler, M., Velázquez, A.L.M., Sundue, M. et al. Alansmia, a new genus of grammitid ferns (Polypodiaceae) segregated from Terpsichore. Brittonia 63, 233–244 (2011). https://doi.org/10.1007/s12228-010-9156-y

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