REFERENCES

• Cave , M. S. 1958–65 . Index to plant chromosome numbers. [1956–1964], Vol.1, 2. Chapel Hill (University Press)
   Google Scholar
• Chiarugi , A. 1960 . Tavole cromosomiche delle Pteridophyta. . Caryologia , 13 : 27 – 150 .
   Google Scholar
• Duckett , J. G. and Duckett , A. R. 1980 . Reproductive biology and population dynamics of wild gametophytes of Equisetum. . Bot. Journ. Linn. Soc. , 80 : 1 – 40 .
   Web of Science ®Google Scholar
• Duckett , J. G. and Pang , W. C. 1984 . The origins of heterospory: a comparative study of sexual behaviour in the fern Platyzoma microphyllum R. Br. and the horsetail Equisetum giganteum L. . Bot. Journ. Linn. Soc. , 88 : 11 – 34 .
   Google Scholar
• Duncan , T. and Smith , A. R. 1978 . Primary basic chromosome numbers in Ferns: facts or fantasies? . Syst. Bot. , 3 : 105 – 114 .
   Web of Science ®Google Scholar
• Fabbri , F. 1963 . Primo supplemento alle tavole cromosomiche delle Pteridophyta di Alberto Chiarugi. . Caryologia , 16 : 237 – 335 .
   Web of Science ®Google Scholar
• Fabbri , F. 1965 . Secondo supplemento alle tavole cromosomiche delle Pteridophyta di Alberto Chiarugi. . Caryologia , 18 : 675 – 731 .
   Web of Science ®Google Scholar
• Goldblatt , P. 1981–85 . Index to plant chromosome numbers 1975–78, 1979–81, 1982–83. . Monogr. Syst. Stud. Vol. , 5 : 1981 8 1984, 13 1985. St. Louis (Missouri Bot. Gard.)
   Google Scholar
• Haufler , C. H. 1985 . 315 – 323 . Pteridophyte evolutionary biology: the electrophoretic approach. Proc. Roy. Soc. Edinburgh86B
   Google Scholar
• Haufler , C. H. 1987 . Electrophoresis is modifying our concepts of evolution in homosporous pteridophytes . Amer. Journ. Bot. , 74 : 953 – 966 .
   Google Scholar
• Haufler , C. H. and Soltis , D. S. 1986 . Genetic evidence suggests that homosporous ferns with high chromosome numbers are diploid. . Proc. Natl. Acad. Sci. U.S.A. , 83 : 4389 – 4393 .
   PubMed Web of Science ®Google Scholar
• Hauke , R. L. 1977 . Experimental studies on growth and sexual determination in Equisetum gametophytes . Amer. Fern Journ. , 67 : 18 – 31 .
   Google Scholar
• 1973 . Sexual and subsexual systems in homosporous Pteridophytes: a new hypothesis. . Amer. Journ. Bot. , 60 : 535 – 544 . KLEKOWSKI È.J
   Web of Science ®Google Scholar
• Klekowski , E. J. 1979 . The experimental biology of Ferns 133 – 170 . The genetic and reproductive biology of Ferns, in DYER A.F. (edit.), (pp.). London (Acad. Press)
   Google Scholar
• Klekowski , E. J. and Baker , H. G. 1966 . Evolutionary significance of polyploidy in the Pteridophyta. . Science , 153 : 305 – 307 .
   PubMed Web of Science ®Google Scholar
• Löve , Å. 1965–83 . IOPB Chromosome number reports. V-LXXXI. Taxon Vol.14–32
   Google Scholar
• Löve , Å. 1984–87 . Chromosome number reports. LXXXII-XCIV . Taxon , 33–36
   Google Scholar
• Löve , Å. , Love , D. and Pichi Sermolli , R. E.G. 1977 . Cytotaxonomical atlas of the Pteridophyta. Vaduz (J. Cramer)
   Google Scholar
• Löve , Å. and Solbrig , O. T. 1964–65 . IOPB Chromosome number reports. I-IV. Taxon Vol.13–14
   Google Scholar
• Lovis , J. D. 1977 . Evolutionary patterns and processes in ferns. . Adv. Bot. Res. , 4 : 229 – 415 .
   Google Scholar
• Manton , I. 1950 . Problems of cytology and evolution in the Pteridophyta. Cambridge (University Press)
   Google Scholar
• Mehra , P. N. 1961 . Cytological evolution of Ferns with particular reference to Himalayan forms. . Proc. 48th Indian Sci. Congr. , 2 : 1 – 24 .
   Google Scholar
• Mohan , Ramh Y. and Chatterjee , J. 1970 . Gametophytes of Equisetum ramosissimum. II. Sexuality and its modification . Phytomorphology , 20 : 151 – 172 .
   Google Scholar
• Moore , R. J. 1970–77 . Index to plant chromosome numbers for 1968, 1969, 1970, 1967–1971, 1972, 19731974. . Regnum Veg. Vol. , 68 : 1970 77 1971, 84 1972, 90 1973, 91 1974, 96 1977. Utrecht (I.A.P.T.)
   Google Scholar
• Ornduff , R. 1967–69 . Index to plant chromosome numbers for 1965, 1966, 1967 . Regnum Veg. , 50 : 1967 ,55(1968), 59(1969). Utrecht (I.A.P.T.)
   Google Scholar
• Pichi Sermolli , R. E.G. 1977 . Tentamen Pteridophytorum genera in taxonomicum ordinem redigendi. . Webbia , 31 : 313 – 512 .
   Google Scholar
• Reichstein , T. 1981 . Hybrids in European Aspleniaceae (Pteridophyta). . Bot. Helv. , 91 : 89 – 139 .
   Web of Science ®Google Scholar
• Soltis , D. E. 1986 . Genetic evidence for diploidy in Equisetum. . Amer. Journ. Bot. , 73 : 908 – 913 .
   Web of Science ®Google Scholar
• Soltis , D. E. and Soltis , P. S. 1986 . Electrophoretic evidence for inbreeding in the fern Botrychium virginianum (Ophioglossaceae) . Amer. Journ. Bot. , 73 : 588 – 592 .
   Google Scholar
• Sorsa , V. 1968 . Chromosome studies on Puerto Rican Ferns (Gleicheniaceae). . Caryologia , 21 : 97 – 103 .
   Web of Science ®Google Scholar
• Tryon , A. F. 1964 . Platyzoma—A Queensland fern with incipient heterospory. . Amer. Journ. Bot. , 51 : 939 – 942 .
   Web of Science ®Google Scholar
• Vessey , J. and Barlow , B. A. 1963 . Chromosome numbers and phytogeny in the Hymenophyllaceae. . Proc. Linn. Soc. New South Wales , 83 : 301 – 306 .
   Google Scholar
• Vida , G. 1976 . Evolutionary Biology 267 – 294 . The role of polyploidy in evolution, in NOVÁK V.J.A. & PACLTOVÁ B. (edit.), (pp.). Praha (Czechoslovak Acad. Sci.)
   Google Scholar
• Wagner , W. H. and Wagner , F. S. 1980 . Polyploidy: biological relevance 199 – 214 . Polyploidy in Pteridophytes, in LEWIS W.H. (edit.), (pp.). New York (Plenum Press)
   Google Scholar
• Walker , T. G. 1966 . A cytotaxonomic survey of the Pteridophytes of Jamaica. . Trans. Roy. Soc. Edinburgh , 67 : 169 – 237 .
   Google Scholar
• Walker , T. G. 1979 . The experimental biology of Ferns 87 – 132 . The cytogenetics of Ferns, in DYER A.F. (edit.), (pp.). London (Acad. Press)
   Google Scholar