Evolutionary Patterns and Processes in Ferns

Chromosomal evolution in higher plants

1971 • 3,040 citations

Strong Inference

1964 • 2,715 citations

Animal cytology and evolution

1980 • 2,302 citations

Speciation in Amazonian Forest Birds

1969 • 2,115 citations

Flowering Plants--Origin and Dispersal.

1970 • 1,185 citations

Genetic Control of the Cytologically Diploid Behaviour of Hexaploid Wheat

1958 • 925 citations

Problems of cytology and evolution in the Pteridophyta

1950 • 750 citations

Morphology of Vascular Plants

1972 • 677 citations

A dictionary of the flowering plants and ferns

1919 • 638 citations

Types of Polyploids: Their Classification and Significance

1947 • 632 citations

SOMATIC CROSSING OVER AND SEGREGATION IN DROSOPHILA MELANOGASTER

1936 • 540 citations

Evolutionary divergence among adjacent plant populations I. The evidence and its theoretical analysis

1966 • 430 citations

Variation and Evolution in Plants.

1951 • 383 citations

A Dictionary of the Flowering Plants and Ferns.

1967 • 335 citations

Evolution in closely adjacent plant populations III. Agrostis tenuis on a small copper mine

1968 • 320 citations

Trends in Genetic Analysis

1959 • 282 citations

Genetic Analysis Based on Mitotic Recombination

1958 • 273 citations

PALYNOLOGICAL EVIDENCE ON EARLY DIFFERENTIATION OF ANGIOSPERMS

1970 • 267 citations

Genetic Variation in Chromosome Pairing

1965 • 264 citations

Cretaceous angiosperm pollen of the Atlantic coastal plain and its evolutionary significance

1969 • 252 citations

South American anoles: the geographic differentiation and evolution of the Anolis chrysolepis species group (Sauria, Iguanidae)

1970 • 251 citations

Phytogeographic support tor the theory of Pleistocene forest refuges in the Amazon Basin, based on evidence from distribution patterns in Caryocaraceae, Chrysobalanaceae, Dichapetalaceae and Lecythidaceae

1973 • 235 citations

The diploidisation of polyploid wheat

1960 • 216 citations

ÜBER POLYPLOIDIE IN BEZIEHUNG ZU KLIMA, ÖKOLOGIE UND PHYLOGENIE

2010 • 215 citations

Reproductive Biology of the Pteridophyta. III. A study of the Blechnaceae

1969 • 200 citations

Comparative Morphology of Vascular Plants

1960 • 191 citations

The ecology of serpentine soils: A symposium. III. Plant species in relation to serpentine soils.

1954 • 190 citations

Chromosome Botany and the Origins of Cultivated Plants

1973 • 187 citations

Observations on the cytology and taxonomy of the pteridophyte flora of Ceylon

1954 • 176 citations

A revised classification of Leptosporangiate ferns.

1947 • 174 citations

Evolutionary Significance of Polyploidy in the Pteridophyta

1966 • 174 citations

Quaternary refugia in tropical America: evidence from race formation inHeliconiusbutterflies

1974 • 171 citations

INCOMPATIBILITY IN FLOWERING PLANTS

1949 • 164 citations

IX.—A Cytotaxonomic Survey of the Pteridophytes of Jamaica

1966 • 152 citations

Ecological Genetics and Evolution

1972 • 138 citations

Primula kewensis and its derivatives

1929 • 130 citations

Die Bedeutungen der Polyploidie fur die Verbreitung der Angiospermen, erlautert an den Arten Schleswig-Holsteins, mit Ausblicken auf andere Florengebiete

1934 • 127 citations

Genetic Control of Chromosome Pairing in Intergeneric Hybrids with Wheat

1959 • 122 citations

THE CONDUPLICATE CARPEL OF DICOTYLEDONS AND ITS INITIAL TRENDS OF SPECIALIZATION

1951 • 117 citations

Gametophytes of Four Tropical Fern Genera Reproducing Independently of Their Sporophytes in the Southern Appalachians

1967 • 113 citations

A cytological study ofCrepis fuliginosa, C. Neglecta, and theirF 1 hybrid, and its bearing on the mechanism of phylogenetic reduction in chromosome number

1943 • 112 citations

A CHROMATOGRAPHIC STUDY OF RETICULATE EVOLUTION IN THE APPALACHIAN ASPLENIUM COMPLEX

1963 • 109 citations

Illustrations of the geology of Yorkshire; or, a description of the strata and organic remains

1875 • 107 citations

The meiotic consequences of spontaneous Chromosome breakage

1966 • 106 citations

The Structure and Development of the Mosses and Ferns

1896 • 106 citations

Differentiation-Hybridization Cycles and Polyploidy in Achillea

1959 • 103 citations

THE BIOLOGICAL SPECIES CONCEPT AND ITS EVOLUTIONARY STRUCTURE

1964 • 102 citations

SEXUAL AND SUBSEXUAL SYSTEMS IN HOMOSPOROUS PTERIDOPHYTES: A NEW HYPOTHESIS

1973 • 101 citations

Reproductive Biology and Evolution in the Pteridophyta

1974 • 99 citations

THE CLASSIFICATION OF FERNS

1949 • 97 citations

Comparative Morphological Study of the Stomata in the Filicopsida

1970 • 95 citations

Physiology of incompatibility in plants

1943 • 85 citations

II. The cretaceous plant-bearing rocks Western Greenland

1927 • 81 citations

Cytotaxonomic studies on the West African Labiatae

1962 • 79 citations

Reproductive biology of the Pteridophyta: 1. General considerations and a study of Onoclea sensibilis L.

1968 • 79 citations

Plant Life Through the Ages

1933 • 77 citations

A REVISION OF THE GENUS LINDSAEA IN THE NEW WORLD WITH NOTES ON ALLIED GENERA

1957 • 76 citations

A NEW TYPE OF APOGAMY IN FERNS

1964 • 75 citations

Secondo Supplemento AlleTavole Cromosomiche Delle Pteridophytadi Alberto Chiarugi

1965 • 75 citations

Chromosomes and the classification of the Commelinaceae

1972 • 74 citations

The nature of tetraploidy inPrimula kewensis

1939 • 73 citations

GENETIC LOAD IN OSMUNDA REGALIS POPULATIONS

1973 • 71 citations

A PHYLOGENETIC CLASSIFICATION OF THE HOMOSPOROUS FERNS

1970 • 70 citations

THE SIGNIFICANCE OF DIFFERENCES IN THE DISTRIBUTION OF DIPLOIDS AND POLYPLOIDS

2010 • 70 citations

Position of the Gene determining the Diploid-like Meiotic Behaviour of Wheat

1960 • 66 citations

Part II. The terrestrial botany of the Tristan da Cunha Islands

1965 • 66 citations

CYTOGENETIC STUDIES IN THE DRYOPTERIS SPINULOSA COMPLEX. II.

1961 • 64 citations

A Biosystematic Survey of United States Ferns: Preliminary Abstract

1963 • 64 citations

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

1961 • 63 citations

THE SUBDIVISION OF THE POLYPODIACEAE

1956 • 62 citations

POPULATIONAL AND GENETIC STUDIES OF A HOMOSPOROUS FERN—OSMUNDA REGALIS

1970 • 61 citations

Chromosome studies on Japanese ferns(1)

1965 • 60 citations

CHROMOSOME STUDIES ON FERNS

1953 • 57 citations

Systematics of the Genus Ceratopteris Brongn. (Parkeriaceae) II. Taxonomy

1974 • 54 citations

Interspecific Relationships in the Polypodium Pectinatum-Plumula Complex

1968 • 54 citations

Die Apogamie bei Aspidium remotum Al. Br.

1932 • 53 citations

PLATYZOMA—A QUEENSLAND FERN WITH INCIPIENT HETEROSPORY

1964 • 52 citations

Cytology of the fern flora of Tristan da Cunha

1968 • 52 citations

The ferns and fern-allies of west tropical Africa.

1959 • 51 citations

CHROMOSOME NUMBERS OF SOME WESTERN CANADIAN PLANTS

1966 • 50 citations

Species-specific kaempferol derivatives in ferns of the appalachian Asplenium complex

1973 • 50 citations

Heterozygosity for recessive lethals in homosporous fern populations: Thelypteris palustris and Onoclea sensibilis

1972 • 49 citations

Die Phlorglucide von Dryopteris viliarii (Bell.) Woynar und anderer Farne der Gattung Dryopteris sowie die mögliche Abstammung von D. filix‐mas (L.) Schott

1971 • 48 citations

Reticulate Evolution in the Appalachian Aspleniums

1954 • 47 citations

Cytology and Evolution in the Fern Genus Pteris L.

1962 • 45 citations

Ricerche al Microscopio Ottico ed Elettronico Sulla Struttura del Nucleolo di Cellule Meristematiche di Alcune Piante e Considerazioni Critiche Sulla Teoria del «Nucleolonema»

1963 • 45 citations

Reproductive biology of the Pteridophyta IV. An experimental study of mating systems in Ceratopteris thalictroides (L.) Brongn.

1970 • 45 citations

The Conduplicate Carpel of Dicotyledons and Its Initial Trends of Specialization

1951 • 44 citations

ABNORMAL REDUCTIONAL AND NONREDUCTIONAL MEIOSIS IN CERATOPTERIS: ALTERNATIVES TO HOMOZYGOSITY AND HYBRID STERILITY IN HOMOSPOROUS FERNS

1973 • 44 citations

A Chromatographic Study of Reticulate Evolution in the Appalachian Asplenium Complex

1963 • 44 citations

5.—Additional Cytotaxonomic Notes on the Pteridophytes of Jamaica

1973 • 44 citations

CHROMOSOME PAIRING AND PHYLOGENETIC AFFINITIES

1972 • 41 citations

Cytotaxonomic observations on North American ferns

1955 • 39 citations

Cytology of hymenophyllaceae

1957 • 38 citations

Meiosis in <i>Paris</i>. II

1953 • 38 citations

Reticulation of Holly Ferns (Polystichum) in the Western United States and Adjacent Canada

1973 • 37 citations

A Remarkably Reduced Vascular Plant in the United States

1963 • 37 citations

A PROVISIONAL CATALOGUE OF THE FAMILY NAMES OF LIVING PTERIDOPHYTES

1970 • 37 citations

Incompatibility in bracken

1956 • 36 citations

Die Phloroglucide von dreiDryopteris-Arten von den Azoren sowie zwei Arten von Madeira und den Kanarischen Inseln zum Vergleich

1975 • 36 citations

SYSTEMATIC REVISION OF THE SUCKER CREEK AND TROUT CREEK MIOCENE FLORAS OF SOUTHEASTERN OREGON

1963 • 36 citations

Apomixis, Polyploidy, and Speciation in Dichanthium

1970 • 36 citations

The pattern of morphological variation in diploid and tetraploid Dactylis

1961 • 35 citations

Induced Apogamy in Dryopteris dilatata (Hoffm.) A. Gray and D. Filix-mas (L.) Schott emend. and its Significance for the Interpretation of the Two Species

1954 • 34 citations

Chromosome Observations on the Ferns of Mexico

1966 • 33 citations

Autopolyploidy in Asplenium

1964 • 33 citations

Sexual and Subsexual Systems in Homosporous Pteridophytes: A New Hypothesis

1973 • 32 citations

Cytotaxonomic observations on some Hymenophyllaceae from the New Hebrides, Fiji and New Caledonia

1975 • 32 citations

The Commelinaceae of West Africa: A biosystematic survey

1967 • 31 citations

Chromosome Studies on Ferns

1953 • 30 citations

Genetic Load in Osmunda regalis Populations

1973 • 30 citations

THE DISTRIBUTION OF INVERSIONS IN TRADESCANTIA

1940 • 30 citations

Ameiotic Alternation of Generations: A New Life Cycle in the Ferns

1964 • 29 citations

A monographic study of the fern genus Woodsia

1964 • 29 citations

Contributions to the cytology and taxonomy of species of Polypodium in Europe and America. II. Taxonomy

1961 • 29 citations

CHROMOSOMES AND FERN PHYLOGENY WITH SPECIAL REFERENCE TO “PTERIDACEAE”

1958 • 29 citations

CYTO‐TAXONOMIG STUDIES ON NEW ZEALAND PTERIDACEAE

1957 • 29 citations

Evidence against self-incompatibility and for genetic lethals in the fern Stenochlaena tenuifolia (Desv.) Moore

1970 • 28 citations

A First Report on Pseudomeiotic Sporogenesis, a Type of Spore Reproduction by Which "Sterile" Ferns Produce Gametophytes

1962 • 28 citations

The spore-bearing organs of the Cretaceous fern Weichselia Stiehler

1968 • 28 citations

A NEW BASE NUMBER IN THE GENUS LYGODIUM

1965 • 28 citations

ON STROMATOPTERIS AND ITS ILL‐DEFINED ORGANS

1969 • 27 citations

The Nature of Polyploidy inAsplenium Ruta-MurariaL. andA. LepidumC. Presl

1970 • 27 citations

THE MORPHOLOGY AND CYTOLOGY OF SPOROGENESIS OF TRICHOMANES PROLIFERUM BL.

1960 • 27 citations

A Study of Apogamy in Nephrodium hirtipes, Hk

1919 • 27 citations

Cytogenetic Studies in the Dryopteris spinulosa Complex. II.

1961 • 26 citations

Cytotaxonomic Observations on Some West Himalayan Pteridaceae

1960 • 26 citations

IOPB CHROMOSOME NUMBER REPORTS. I

1964 • 26 citations

Cytological and Taxonomic Notes on a Small Collection of Living Ferns from Galapagos

1968 • 26 citations

A Preliminary Review of Spore Number and Apogamy within the Genus Cheilanthes

1966 • 25 citations

Chemotaxonomic studies on Dryopteris from Quebec and eastern North America

1974 • 25 citations

A biosystematic investigation of the Asplenium lepidum complex

1976 • 25 citations

Index filicum : Supplementum Tertium pro annis 1917-1933

1934 • 25 citations

Populational and Genetic Studies of a Homosporous Fern-Osmunda regalis

1970 • 25 citations

NONHOMOLOGOUS CHROMOSOME PAIRING IN THE FERN CERATOPTERIS

1974 • 24 citations

Hybridization in Some Species of Pteris L.

1958 • 24 citations

A chromatographic and cytological study of Dryopteris filix-mas and related taxa in North America

1971 • 24 citations

ASPLENIUM PLENUM: A FERN WHICH SUGGESTS AN UNUSUAL METHOD OF SPECIES FORMATION

1967 • 23 citations

Evidence Against Genetic Self-Incompatibility in the Homosporous Fern Pteridium aquilinum

1972 • 22 citations

Die Phloroglucide von Dryopteris caucasica (A. Br.) Fraser‐Jenkins et Corley

1973 • 22 citations

Studies in the family Thelypteridaceae. The genera Phegopteris, Pseudophegopteris, and Macrothelypteris

1969 • 22 citations

A Revised Classification of Thelypteris Subgenus Amauropelta

1974 • 22 citations

Chromosome Studies on <i>Trillium kamtschaticum</i> Pall. and Its Allies. XIX

1950 • 22 citations

Platyzoma : A New Look at an Old Link in Ferns

1967 • 21 citations

Artificial Reconstruction of a Species of Fern, Asplenium adulterinum

1968 • 21 citations

Platyzoma-A Queensland Fern with Incipient Heterospory

1964 • 21 citations

Cytogeographic Studies on Dryopteris of Japan

1975 • 21 citations

A chromatographic and cytological study of Dryopteris dilatata in eastern North America

1969 • 20 citations

A chromatographic and cytological study of Dryopteris dilatata in North America and eastern Asia

1971 • 20 citations

Index filicum : Supplementum 1906-1912

1913 • 20 citations

Chromosome Numbers in some Ferns from Kodaikanal, South India

1965 • 19 citations

OBSERVATIONS ON SCHIZAEA AND ACTINOSTACHYS SPP., INCLUDING A. OLIGOSTACHYS, SP. NOV.

1968 • 19 citations

A CYTOGENETIC INVESTIGATION IN A PHYLLITIS‐ASPLENIUM COMPLEX

1964 • 19 citations

Morphological and Cytological Data on Southeastern United States Species of the Asplenium heterochroum-resiliens Complex

1966 • 19 citations

CHROMOSOME NUMBERS OF FERNS IN ONTARIO

1964 • 19 citations

CHROMOSOME BEHAVIOR IN HYBRID FERNS: A REINTERPRETATION OF APPALACHIAN DRYOPTERIS

1975 • 18 citations

Chemotaxonomic studies on hybrids of Dryopteris in eastern North America

1975 • 18 citations

APOMIXIS AND VEGETATIVE REPRODUCTION IN FERNS

1966 • 18 citations

FURTHER STUDIES IN THE GENUS DRYOPTERIS: THE ORIGIN OF D. CLINTONIANA, D. CELSA AND RELATED TAXA

1962 • 18 citations

Chemotaxonomic investigations on the Dryopteris cristata complex in North America

1971 • 18 citations

The New Zealand Species ofTmesipteris(Psilotaceae)

1975 • 17 citations

Cytotaxonomic studies on Indian Commelinaceae: A review*

1968 • 17 citations

�ber das spontane Entstehen vonAsplenium adulterinum aus einem nat�rlichen Bastard

1968 • 17 citations

Two New Species of Ferns from the United States

1966 • 17 citations

Abnormal Reductional and Nonreductional Meiosis in Ceratopteris: Alternatives to Homozygosity and Hybrid Sterility in Homosporous Ferns

1973 • 17 citations

Dryopteris in the Huron Mountain Club Area of Michigan

1962 • 16 citations

Cytotaxonorny of Spanish plants. I. Introduction. Pteridophyta and Gymnospermae

1972 • 16 citations

PALAEOBOTANY OF THE MESOPHYTIC II

1966 • 16 citations

Tree fern indusia: studies of development and diversity

1975 • 16 citations

THE DRYOPTERIS SPINULOSA COMPLEX IN FINLAND

2009 • 16 citations

The spores of Dryopteris filix-mas and related taxa in North America

1974 • 16 citations

Kalyologische Untersuchungen ^|^uuml;ber Osmundaceae I

1966 • 15 citations

Cytological and taxonomic observations on some members of the Cyclosorus parasiticus complex.1

1958 • 15 citations

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia. II. Autoploidy and alloploidy in African representatives of A. incisum

1970 • 15 citations

Observations on Schizaea and Actinostachys spp., Including A. Oligostachys, sp. nov.

1968 • 15 citations

The Gametophyte of Trichomanes holopterum Kunze

1968 • 15 citations

The Cytotaxonomy of Some Members of the Cheilanthes farinosa Complex in Africa and India

1966 • 15 citations

Cytological Observations on Ferns from Southern China

1965 • 15 citations

Chromosome Numbers in the Genus Anogramma

1975 • 14 citations

Der Grad der Polyploidie bei den Angiospermen in verschiedenen Großarealen

1955 • 14 citations

Cytology of Polypodium in America

1951 • 14 citations

A Chromosome Count inLoxsoma

1975 • 14 citations

Karyological Studies on Osmundaceae II

1967 • 14 citations

THE APOGAMOUS LIFE CYCLE OF TRICHOMANES PINNATUM—A CONFIRMATION OF KLEKOWSKI'S PREDICTIONS ON HOMOEOLOGOUS PAIRING

1975 • 13 citations

Origine de la polyploidie chez Asplenium ruta-muraria L.

1972 • 13 citations

A Cretaceous Gleicheniaceous Fern from Western Greenland

1932 • 13 citations

Systematic Revision of the Sucker Creek and Trout Creek Miocene Floras of Southeastern Oregon

1963 • 13 citations

Karyological Studies on Aspleniaceae I

1969 • 13 citations

Some new aspects of the fern Platyzoma microphyllum

1961 • 13 citations

A new Todea from New Guinea with remarks on the generic delimitation in recent Osmundaceae (Filices)

1968 • 13 citations

THE ORIGINS OF ASPLENIUM CRETICUM AND A. HAUSSKNECHTII

1976 • 13 citations

CHROMOSOME STUDIES ON FINNISH PTERIDOPHYTA III

2009 • 12 citations

Jurassic Plants from Ceylon

1922 • 12 citations

Chromosome Studies of Brazilian Ferns

1975 • 12 citations

Two Cytological Forms of Polypodium virginianum in Eastern North America

1953 • 12 citations

Experimentell erzeugte Bastarde zwischenDryopteris Filix-mas (L.) Schott undD. paleacea (Sw.) C. Chr.

1955 • 12 citations

ON THE INTRASPECIFIC VARIABILITY OF DRYOPTERIS ASSIMILIS S. WALKER AND DRYOPTERIS SPINULOSA WATT

2009 • 12 citations

Inchoate Speciation in Ceratopteris: An Analysis of the Synthesized Hybrid C. Richardii x C. Pteridoides

1974 • 12 citations

Use of Snail Stomach Cytase in Plant Cytology

1955 • 11 citations

A DIPLOID VARIETY IN THE CYSTOPTERIS FRAGILIS COMPLEX

1956 • 11 citations

Some cytotaxonomic problems in the fern genera Asplenium and Polystichum

1966 • 11 citations

A New Hybrid Spleenwort from Artificial Cultures at Fernwood and Its Relationship to a Peculiar Plant from West Virginia

1958 • 11 citations

A re-definition of the fern-genus Taenitis Willd

1968 • 11 citations

Une espece nouvelle d'Asplenium (Aspleniaceae) d'Espagne

1967 • 11 citations

Karyological Studies in Aspidiaceae I.

1970 • 10 citations

Natural interspecific hybridization between sexual and apogamous species of the beech fern genus Phegopteris Fée

1972 • 10 citations

A Chromosome Count in Mohria

1964 • 10 citations

Karyological Studies in Hymenophyllaceae I

1969 • 10 citations

FLORAE MALESIANAE PRAECURSORES XVI ON THE TAXONOMIC SUBDIVISION OF THE GLEICHENIACEAE, WITH DESCRIPTIONS OF NEW MALAYSIAN SPECIES AND VARIETIES

1957 • 10 citations

A Comparative Account of the Fern-Genera Syngramma J.Sm. and Taenitis Willd., with Discussion of Their Relationships to Each Other and to Other Genera

1975 • 9 citations

Asplenium ebenoides X platyneuron, a New Triploid Hybrid Produced under Artificial Conditions

1956 • 9 citations

Synthetic and Wild Asplenium gravesii

1957 • 9 citations

A Chromosome Count in Schizaea

1958 • 9 citations

Cytological Observations on the Himalayan Species of Athyrium and Comments on the Evolutionary Status of the Genus

1960 • 9 citations

A New Natural Hybrid in the Appalachian Asplenium Complex and Its Taxonomic Significance

1969 • 9 citations

The Gametophyte of Dipteris conjugata

1945 • 9 citations

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia.

1967 • 9 citations

A CHROMATOGRAPHIC AND CYTOLOGICAL STUDY OF THE DRYOPTERIS SPINULOSA COMPLEX IN FINLAND

2009 • 9 citations

The anatomy of some ferns of the Taenitis alliance

1968 • 8 citations

Asplenium plenum: A Fern which Suggests an Unusual Method of Species Formation

1967 • 8 citations

Idiopteris: A New Genus of Ferns from Ceylon

1957 • 8 citations

Karyological Studies on Aspleniaceae II

1970 • 8 citations

New Cytological Records for Cystodium and Dicksonia

1965 • 8 citations

Cytology of <i>Ophioglossum coriaceum</i> A. Cunn

1957 • 8 citations

On Stromatopteris and its Ill-Defined Organs

1969 • 8 citations

Cytotaxonomy of ^|^reg;Ophioglossales III.

1965 • 8 citations

The Polypodium pectinatum-plumula Complex in Florida

1968 • 8 citations

Cytology of Some Genera of Polypodiaceae in Eastern India. II

1963 • 8 citations

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia

1970 • 7 citations

Nonhomologous Chromosome Pairing in the Fern Ceratopteris

1974 • 7 citations

On the Nature and Possible Relationships of the Fern Genus Platyzoma R. Br.

1956 • 7 citations

Cytological Studies of Salviniaceae I

1969 • 7 citations

New Evidence on the Hybrid Nature of Asplenium kentuckiense

1961 • 7 citations

Notes onOnychiopsis psilotoides(Stokes & Webb)

1961 • 7 citations

Problems of Apomixis and the Treatment of Agamic Complexes

1969 • 6 citations

Facultative Apomixis and Polyploidy in Matteuccia orientalis

1973 • 6 citations

Eine in Kultur entstandene diploide Pflanze vonDryopteris filix-mas

1961 • 6 citations

Evolutionary mechanisms in tropical ferns

1969 • 6 citations

THE PROBLEM OF DRYOPTERIS LEEDSII

1962 • 6 citations

Chromosome Studies on Puerto Rican Ferns (Gleicheniaceae)

1968 • 6 citations

A New Hybrid Showing Homology Between Asplenium ebenoides and A. pinnatifidum

1961 • 5 citations

Low Percentage and Grade of Euploidy in the Family Polypodiaceae in Relation to the Epiphytic Habit: An Hypothesis

1963 • 5 citations

VII.—A Further Contribution to the Knowledge of Platyzoma microphyllum R. Br

1918 • 5 citations

Karyological Studies in Polypodiaceae I

1969 • 5 citations

Note sur Asplenium X alternifolium Wulfen

1966 • 5 citations

Further Studies in the Genus Dryopteris: The Origin of D. clintoniana, D. celsa and Related Taxa

1962 • 5 citations

Karyological Studies on Pteridaceae I

1971 • 5 citations

The cytological characteristics of the fern subfamily Lomariopsidoideae sensu Holttum

1966 • 5 citations

Chromosome Behavior in Hybrid Ferns: A Reinterpretation of Appalachian Dryopteris

1975 • 4 citations

The Californian Species of Thelypteris

1958 • 4 citations

Cytology of Meiosis in Matonia

1954 • 4 citations

A NEW GLEICHENIOPSIS FROM THE UPPER CRETACEOUS OF WESTERN GREENLAND

1934 • 3 citations

A New Gleicheniopsis from the Upper Cretaceous of Western Greenland

1934 • 2 citations

Cytological Studies of Salviniaceae II

1970 • 1 citations

The Problem of Dryopteris leedsii

1962 • 1 citations

The Apogamous Life Cycle of Trichomanes pinnatum-A Confirmation of Klekowski's Predictions on Homoeologous Pairing

1975 • 1 citations

The Quaker Collection of Wilmington College

1967 • 1 citations