Brittonia

, Volume 21, Issue 2, pp 178–186 | Cite as

A new natural hybrid in the appalachian asplenium complex and its taxonomic significance

  • W. H. Wagner
  • Florence S. Wagner
Article

Abstract

A new spleenwort hybrid, Asplenium pinnatifidum×trichomanes, from southern Illinois is nicely intermediate in morphology between the parents, and shows no pairing of its genomes: two sets of chromosomes from A.×pinnatifidum and one from A. trichomanes. Taxonomically the cross is significant for its bearing on the interpretation of the taxon A. stotleri Wherry, previously believed to have originated from the same parents. New studies of A. stotleri based upon materials from the now extinct type colony in West Virginia, and from a newly discovered extant colony in Arkansas, show clearly that this taxon is not the same as A. pinnatifidum×trichomanes. Comparisons with A.×bradleyi D. C. Eaton (the tetraploid of A. montanum×platyneuron) indicate that the taxon A. stotleri is similar in all respects except for its more rounded segments. Asplenium stotleri is therefore reinterpreted as a synonym of A.×bradleyi, of which it is regarded as a slightly differentiated local form.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. Braun, E. Lucy. 1939. A new fern hybrid—Asplenium cryptolepis × Camptosorus rhizophyllus. Amer. Fern Jour. 29: 133–135.CrossRefGoogle Scholar
  2. Maxon, W. R. 1938. Notes on American ferns—XXII. Amer. Fern Jour. 28: 140–144.CrossRefGoogle Scholar
  3. Smith, D. M., T. R. Bryant, & D. E. Tate. 1961. New evidence on the hybrid nature of Asplenium kentuckiense. Brittonia 13: 289–292.CrossRefGoogle Scholar
  4. —— 1963. A chromatographic study of reticulate evolution in the Appalachian Asplenium complex. Amer. Jour. Bot. 50: 952–958.CrossRefGoogle Scholar
  5. Wagner, W. H., Jr. 1954. Reticulate evolution in the Appalachian Aspleniums. Evolution 8: 103–118.CrossRefGoogle Scholar
  6. —— 1957. Synthetic and wild Asplenium gravesii. Brittonia 9: 57–63.CrossRefGoogle Scholar
  7. Wherry, E. T. 1925. The Appalachian Aspleniums. Amer. Fern Jour. 15: 46–54.CrossRefGoogle Scholar
  8. —— 1961. The Fern Guide; Northeastern and Midland United States and Adjacent Canada. Garden City, New York: Doubleday & Co. (Doubleday Nature Guide Series #9). 318 pp.Google Scholar

Copyright information

© The New York Botanical Garden 1969

Authors and Affiliations

  • W. H. Wagner
    • 1
  • Florence S. Wagner
    • 1
  1. 1.Dept. of BotanyUniv. of MichiganAnn Arbor

Personalised recommendations