The nothogenus ×Cyathidaria is established to accommodate various natural hybrids between species of Cyathea and Cnemidaria, all characterised by abortive spores and morphologically intermediate between their respective parent species. ×Cyathidaria acunae, the natural hybrid between Cnemidaria horrida and Cyathea aspera is a newly described nothospecies from Cuba. Four new combinations in ×Cyathidaria are made.
References
D. S. Barrington
1978: A revision of the genus Trichipteris. — Contr. Gray Herb. 208: 3–93. Google Scholar
D. S. Conant
1983: A revision of the genus Alsophila (Cyatheaceae) in the Americas. — J. Arnold Arbor. 64: 333–382. Google Scholar
D. S. Conant
&
G. Cooper-Dryver
1980: Autogamous allohomoploidy in Alsophila and Nephelea (Cyatheaceae); a new hypothesis for speciation in homosporous ferns. — Amer. J. Bot. 67: 1269–1288. Google Scholar
G. J. Gastony
1973: A revision of the fern genus Nephelea. — Contr. Gray Herb. 203: 81–155. Google Scholar
I. W. Knobloch
1975: A review of pteridophyte hybrids with special reference to their morphology. — Phytomorphology 25: 249–252. Google Scholar
I. W. Knobloch
1976: Pteridophyte hybrids. — Publ. Mus. Michigan State Univ., Biol. Ser. 5: 277–352. Google Scholar
I. W. Knobloch
1986: On hybrid pteridophytes: second supplement. — I.A.P. News 1: 3. Google Scholar
I. W. Knobloch
,
M. Gibby
&
C. Fraser-Jenkins
1984: Recent advances in our knowledge of pteridophyte hybrids. — Taxon 33: 256–270. Google Scholar
G. R. Proctor
1989: Ferns of Puerto Rico and the Virgin Islands. — Mem. New York Bot. Gard. 53. Google Scholar
R. G. Stolze
1974: A taxonomic revision of the genus Cnemidaria (Cyatheaceae). — Fieldiana, Bot. 37. Google Scholar
R. M. Tryon
1976: A revision of the genus Cyathea. — Contr. Gray Herb. 206: 19–98. Google Scholar
