Published November 4, 2019 | Version v1
Taxonomic treatment Open

Phegopteris

  • 1. Pringle Herbarium, Department of Plant Biology, 111 Jeffords Hall, University of Vermont, 63 Carrigan Drive, Burlington, Vermont 05405, U. S. A.

Description

KEY TO NORTH AMERICAN PHEGOPTERIS

1. Blades of fronds elongate, widest toward the middle......................... P. decursive-pinnata (H. C. Hall) Fée

1 '. Blades of fronds widest at the base.

2. Blades of fronds usually slightly wider than long; all pinnae, including proximal pair, winged to rachis; proximal pinnae (2–)3X as long as wide............................................. P. hexagonoptera (Michx.) Fée

2 '. Blades of fronds longer than wide; pinnae winged to rachis except proximal pair not winged to rachis (rarely, more than one proximal pinna pair not winged in P. connectilis); proximal pinnae 4–5X as long as wide.

3. Blade outline ovate, proximal pinnae strongly declined and adaxially inflexed, average 4X as long as wide; spore length averaging 55 ± 5.4 μ m...................................... P. connectilis (Michx.) Watt

3'. Blade outline triangular, proximal pinnae slightly to moderately declined and adaxially inflexed, average 5X as long as wide; spore length averaging 64 ± 4.6 μ m......... P. excelsior N. R. Patel & A. V. Gilman

Notes

Published as part of Patel, Nikisha R., Fawcett, Susan & Gilman, Arthur V., 2019, Phegopteris excelsior (Thelypteridaceae): A New Species of North American Tetraploid Beech Fern, pp. 211-218 in Novon, A Journal for Botanical Nomenclature 27 (4) on page 217, DOI: 10.3417/2019409, http://zenodo.org/record/4561918

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Linked records

Additional details

Related works

Is part of
Journal article: 10.3417/2019409 (DOI)
Journal article: http://zenodo.org/record/4561918 (URL)
Journal article: http://publication.plazi.org/id/133EFFF86242345D054BFFD5FF805439 (URL)

Biodiversity

Kingdom
Plantae
Phylum
Tracheophyta
Order
Polypodiales
Family
Thelypteridaceae
Genus
Phegopteris
Taxon rank
genus