ARE LYCOPODS WITH HIGH CHROMOSOME NUMBERS ANCIENT POLYPLOIDS?

Variation and Evolution in Plants

1950 • 4,163 citations

An Integrated System of Classification of Flowering Plants

1995 • 3,425 citations

An Integrated System of Classification of Flowering Plants.

1982 • 2,076 citations

Plant Speciation

1981 • 1,645 citations

Starch Gel Electrophoresis of Ferns: A Compilation of Grinding Buffers, Gel and Electrode Buffers, and Staining Schedules

1983 • 1,449 citations

Modes of Speciation.

1978 • 1,300 citations

Tetraploidy and the Evolution of Salmonid Fishes

1984 • 897 citations

Problems of cytology and evolution in the Pteridophyta

1950 • 750 citations

Evolution and Environment

1968 • 733 citations

Morphology of Vascular Plants

1972 • 677 citations

Conservation and Duplication of Isozymes in Plants

1982 • 621 citations

Ferns and Allied Plants

1982 • 620 citations

Electrophoretic evidence and plant population.

1981 • 552 citations

Isozymes. Current Topics in Biological and Medical Research

1982 • 444 citations

The experimental biology of ferns

1979 • 403 citations

Phylogenetic and Systematic Inferences from Electrophoretic Studies

1983 • 342 citations

GENETIC AND BIOCHEMICAL CONSEQUENCES OF POLYPLOIDY IN TRAGOPOGON

1976 • 303 citations

Polyploidy in Species Populations

1980 • 251 citations

The genus Saprolegnia.

1970 • 222 citations

Morphology of Plants and Fungi

1987 • 215 citations

Enzyme Variability and Modes of Evolution in Bommeria (Pteridaceae)

1985 • 200 citations

Evolution of DNA content in higher plants

1976 • 193 citations

Loss of duplicate gene expression after polyploidisation

1977 • 182 citations

Evolutionary Significance of Polyploidy in the Pteridophyta

1966 • 174 citations

Polyploidy in Plants: Unsolved Problems and Prospects

1980 • 168 citations

ELECTROPHORESIS IS MODIFYING OUR CONCEPTS OF EVOLUTION IN HOMOSPOROUS PTERIDOPHYTES

1987 • 151 citations

A survey of DNA content per cell and per chromosome of prokaryotic and eukaryotic organisms: some evolutionary considerations.

1972 • 147 citations

Electrophoretic Evidence of Reticulate Evolution in the Appalachian Asplenium Complex

1985 • 143 citations

Genetic evidence suggests that homosporous ferns with high chromosome numbers are diploid

1986 • 140 citations

RETICULATE EVOLUTION IN THE APPALACHIAN ASPLENIUMS

1954 • 136 citations

Electrophoretic Data and Plant Speciation

1985 • 128 citations

Cytotaxonomical Atlas of the Pteridophyta.

1977 • 117 citations

A CHROMATOGRAPHIC STUDY OF RETICULATE EVOLUTION IN THE APPALACHIAN ASPLENIUM COMPLEX

1963 • 109 citations

Polyploidy in Pteridophytes

1980 • 100 citations

Reproductive Biology and Evolution in the Pteridophyta

1974 • 99 citations

Polyploidy and Breeding Systems in Homosporous Pteridophyta: A Reevaluation

1987 • 95 citations

GENETIC VARIATION IN THE HOMOSPOROUS FERN PELLAEA ANDROMEDIFOLIA

1985 • 79 citations

OBLIGATE OUTCROSSING IN A HOMOSPOROUS FERN: FIELD CONFIRMATION OF A LABORATORY PREDICTION

1984 • 78 citations

Lycopod Spores, I. General Spore Patterns and the Generic Segregates of Lycopodium

1972 • 77 citations

CHLOROPLASTIC AND CYTOSOLIC ISOZYMES OF THE HOMOSPOROUS FERN ATHYRIUM FILIX‐FEMINA L

1983 • 72 citations

Loss of duplicate gene expression in tetraploid Chenopodium

1983 • 72 citations

Contributions to the cytology and taxonomy of species of Polypodium in Europe and America. I. Cytology

1961 • 63 citations

Tetraploidy and the Evolution of the Catostomid Fishes

1984 • 59 citations

Electrophoretic Evidence for Genetic Diploidy in the Bracken Fern ( Pteridium aquilinum )

1987 • 56 citations

Cytology of the fern flora of Tristan da Cunha

1968 • 52 citations

The Systematic Position of Psilotum and Tmesipteris

1977 • 49 citations

GENETIC VARIATION IN LYCOPODIUM LUCIDULUM : A PHYLOGENETIC RELIC

1973 • 48 citations

GENETIC EVIDENCE FOR DIPLOIDY IN EQUISETUM

1986 • 48 citations

EVIDENCE FOR GENETIC HETEROZYGOSITY IN A HOMOSPOROUS FERN

1982 • 45 citations

Gametophytes of Lycopodium as grown in vitro

1957 • 41 citations

Systematics of Polystichum in western North America, north of Mexico

1979 • 39 citations

Systematic Implications of the Psilotaceae

1977 • 32 citations

Gametophytes of Lycopodium obscurum as grown in axenic culture

1977 • 30 citations

The Polypodium vulgare complex in North America

1964 • 28 citations

Electrophoretic Evidence for Allopolyploidy in the Fern Polypodium virginianum

1987 • 28 citations

ON STROMATOPTERIS AND ITS ILL‐DEFINED ORGANS

1969 • 27 citations

Genetics and evolution of multilocus isozymes in hexaploid wheat.

1983 • 26 citations

GAMETOPHYTES AND SUBGENERIC CONCEPTS IN LYCOPODIUM

1976 • 24 citations

The Problem of Generic Segregates in the Form-Genus Lycopodium

1950 • 21 citations

Primary Basic Chromosome Numbers in Ferns: Facts or Fantasies?

1978 • 20 citations

Chloroplastic and Cytosolic Isozymes of the Homosporous Fern Athyrium filix-femina L.

1983 • 20 citations

Special Report: The Present Evolutionary and Taxonomic Status of the Fern Genus Polystichum: The 1984 Botanical Society of America Pteridophyte Section Symposium

1985 • 18 citations

The Chromosomes of Lycopodium lucidulum

1982 • 12 citations

Repeated DNA sequences and species relatedness in the genusEquisetum

1983 • 10 citations

Observations on the Occurrence of the Prothallia of Lycopodium inundatum

1972 • 8 citations