Phylogenetic Analysis of Seed Plants and the Origin of Angiosperms

An Integrated System of Classification of Flowering Plants

1995 • 3,425 citations

Evolution and classification of flowering plants

1979 • 1,692 citations

Flowering Plants. Evolution above the Species Level

1975 • 1,451 citations

Fossil pollen records of extant angiosperms

1981 • 1,047 citations

The Out-Group Comparison Method of Character Analysis

1981 • 805 citations

Morphological characters and homology

1982 • 761 citations

Morphology of Vascular Plants

1972 • 677 citations

Principles of angiosperm taxonomy

1963 • 531 citations

Early cretaceous fossil evidence for angiosperm evolution

1977 • 490 citations

The Bases of Angiosperm Phylogeny: Vegetative Morphology

1975 • 483 citations

Morphology of the Angiosperms.

1961 • 448 citations

Gymnosperms: Structure and Evolution.

1935 • 375 citations

Embryology of Gymnosperms

1978 • 366 citations

The Bases of Angiosperm Phylogeny: Cytology

1975 • 345 citations

Consensus indices for comparing classifications

1982 • 303 citations

Pollen and leaves from the Mid-Cretaceous Potomac group and their bearing on early angiosperm evolution

1976 • 291 citations

The spores and pollen of the Potomac group of Maryland

1963 • 265 citations

Basic features of gymnosperm systematics and phylogeny as evidenced by the fossil record

1984 • 254 citations

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

1969 • 252 citations

Philosophy and the Transformation of Cladistics

1979 • 232 citations

A Cladistic Approach to the Phylogeny of the "Bryophytes"

1984 • 220 citations

On the Origin of Angiosperms.

1907 • 209 citations

Origin of Angiosperms

1978 • 195 citations

Outgroups and Parsimony

1982 • 187 citations

THE DEVELOPMENT OF VESSELS IN ANGIOSPERMS AND ITS SIGNIFICANCE IN MORPHOLOGICAL RESEARCH

1944 • 178 citations

The biology ofGlossopteris: evidence from petrified seed-bearing and pollen-bearing organs

1977 • 175 citations

APERTURE EVOLUTION IN THE POLLEN OF PRIMITIVE ANGIOSPERMS

1974 • 170 citations

Early angiosperm reproduction: An introductory report

1979 • 164 citations

IN SITU GYMNOSPERM POLLEN FROM THE MIDDLE JURASSIC OF YORKSHIRE

1971 • 163 citations

Pollen and spore morphology/plant taxonomy

1957 • 158 citations

EVOLUTION OF EXINE STRUCTURE IN THE POLLEN OF PRIMITIVE ANGIOSPERMS

1974 • 152 citations

The Araucariaceae: An evolutionary perspective

1982 • 150 citations

Stelar morphology and the primary vascular system of seed plants

1982 • 149 citations

Reconstructing Triassic vegetation of eastern Australasia: a new approach for the biostratigraphy of Gondwanaland

1977 • 144 citations

SYSTEMATIC ANATOMY OF THE LEAF EPIDERMIS IN THE MAGNOLIACEAE AND SOME RELATED FAMILIES

1972 • 135 citations

The piperales and the monocots

1977 • 134 citations

VI. The caytoniales, a new group of angiospermous plants from the Jurassic Rocks of Yorkshire

1925 • 132 citations

The shoot apex in seed plants

1971 • 132 citations

EVOLUTIONARY TRENDS IN THE GENUS GINKGO

1968 • 124 citations

RECLASSIFICATION OF PSILOPHYTA

1975 • 120 citations

Ancient Bisexual Flowers

1984 • 119 citations

THE CONDUPLICATE CARPEL OF DICOTYLEDONS AND ITS INITIAL TRENDS OF SPECIALIZATION

1951 • 117 citations

ON THE HIGHER TAXA OF EMBRYOBIONTA

1966 • 111 citations

THE FEMALE REPRODUCTIVE ORGANS OF CONIFERS AND TAXADS

1954 • 109 citations

Arguments for a glossopterid ancestry of angiosperms

1981 • 107 citations

New interpretations of the earliest conifers

1982 • 106 citations

The callistophytales (Pteridospermopsida): Reproductively sophisticated paleozoic gymnosperms

1981 • 106 citations

Morphology of Gymnosperms

1917 • 101 citations

Studies in paleobotany

1961 • 99 citations

VII. On the structure of the palœzoic seed lagenostoma lomaxi , with a statement of the evidence upon which it is referred to Lyginodendron

1905 • 98 citations

Are the Angiosperms Primitively Vesselless?

1981 • 97 citations

Observations on tracheary elements.

1960 • 97 citations

Exine Structures in some fossil and recent spores and pollen as revealed by light and electron microscopy

1966 • 95 citations

Chaloneria Gen. Nov.; Heterosporous Lycophytes from the Pennsylvanian of North America

1983 • 93 citations

VI. On the Cuticles of some Recent and Fossil Cycadean Fronds.

1913 • 88 citations

ANATOMY AND RELATIONSHIPS OF SOME DEVONIAN PROGYMNOSPERMS FROM NEW YORK

1971 • 88 citations

Current status of paleozoic and mesozoic conifers

1982 • 86 citations

Morphologic interpretation of fertile structures in glossopterid gymnosperms

1976 • 83 citations

The earliest seeds

1981 • 82 citations

A Taxonomic Revision of Podocarpus: I. the Sections of the Genus and Their Subdivisons With Special Reference to Leaf Anatomy

1948 • 78 citations

Paleozoic Seed Studies: A Monograph of the American Species of Pachytesta

1964 • 77 citations

Studies on the Evolution of the Angiosperms

1908 • 75 citations

The Bases of Angiosperm Phylogeny: Vegetative Anatomy

1975 • 74 citations

The Pentoxyleae: A New Group of Jurassic Gymnosperms from the Rajmahal Hills of India

1948 • 74 citations

Morphologic variability of Pennsylvanian lyginopterid seed ferns

1981 • 73 citations

XIV.—Some Lower Carboniferous Fructifications from Berwickshire, together with a Theoretical Account of the Evolution of Ovules, Cupules, and Carpels

1966 • 70 citations

Archaeosperma arnoldii-A Cupulate Seed from the Upper Devonian of North America

1968 • 70 citations

Did Dicotyledonous Plants Exist in Early Jurassic Times?

1948 • 70 citations

The current status of medullosan seed ferns

1981 • 70 citations

Xylotomy of the Living Conifers

1973 • 69 citations

MICROGAMETOPHYTE DEVELOPMENT IN THE PALEOZOIC SEED FERN FAMILY CALLISTOPHYTACEAE

1974 • 68 citations

Connection between Archaeopteris and Callixylon

1960 • 64 citations

TETRAXYLOPTERIS SCHMIDTII: ITS FERTILE PARTS AND ITS RELATIONSHIPS WITHIN THE ANEUROPHYTALES

1967 • 62 citations

American Fossil Cycads

2015 • 62 citations

How old are the angiosperms?

1961 • 61 citations

The earliest conifer

1974 • 61 citations

Fertilization in Ginkgo biloba

1955 • 61 citations

The Pollen of Ephedra

1959 • 60 citations

A phylogenetic analysis of the land plants

1980 • 59 citations

CUTICULAR ANATOMY OF ANGIOSPERM LEAVES FROM THE LOWER CRETACEOUS POTOMAC GROUP. I. ZONE I LEAVES

1984 • 59 citations

Classes and Cladists or Individuals and Evolution

1982 • 58 citations

Telangium Scotti, a new Species of Telangium (Calymmatotheca) showing Structure

1904 • 58 citations

Pennsylvanian Flora of Illinois as Revealed in Coal Balls. I

1934 • 58 citations

Pollen morphology in the trimeniaceae

1984 • 57 citations

VESSEL STRUCTURE OF GNETUM AND THE ORIGIN OF ANGIOSPERMS

1982 • 57 citations

XII.—On the Structure of Samaropsis scotica Calder (emended) and Eurystoma angulare gen. et sp. nov., Petrified Seeds from the Calciferous Sandstone Series of Berwickshire

1960 • 56 citations

Phylogeny and Taxonomy of the Angiosperms

1897 • 56 citations

A New Pachytesta from the Berryville Locality of Southeastern Illinois

1951 • 55 citations

CAULINE VASCULATURE AND LEAF TRACE PRODUCTION IN MEDULLOSAN PTERIDOSPERMS

1974 • 52 citations

The ultrastructure and reproductive significance of Monoletes (Pteridospermales) pollen

1978 • 52 citations

Fundamentals of Phytomorphology.

1967 • 52 citations

Studies on triassic fossil plants from Argentina, I. Rhexoxylon from the Ischigualasto formation

1961 • 51 citations

Classification of Gymnosperms from the Viewpoint of Paleobotany

1948 • 51 citations

STRUCTURE OF THE MALE GAMETOPHYTE IN GYMNOSPERMS

1963 • 50 citations

First Devonian platyspermic seed and its implications in gymnosperm evolution

1977 • 50 citations

Cretaceous flowers from Kazakhstan

1983 • 49 citations

The Structure and Origin of the Cycadaceae

1906 • 49 citations

Morphology and Ultrastructure of Four Pennsylvanian Prepollen Types

1978 • 47 citations

A New Interpretation of Coniferous Cones

1944 • 46 citations

PROBABLE ATTACHMENT OF THE DOLEROTHECA CAMPANULUM TO A MYELOXYLON-ALETHOPTERIS TYPE FROND

1974 • 43 citations

Reproductive structures of the Glossopteridales in the plant fossil collection of the Australian Museum

1978 • 42 citations

Contributions to the knowledge of the Caytoniales

1977 • 41 citations

Parasporotheca, Gen. Nov., and Its Bearing on the Interpretation of the Morphology of Permineralized Medullosan Pollen Organs

1978 • 40 citations

THE EVOLUTION OF THE OVULE

1964 • 39 citations

The evolution of miospore polarity

1970 • 39 citations

Taxonomic significance of methylazoxymethanol glycosides in the cycads

1983 • 39 citations

A handbook of Coniferae, including Ginkgoaceæ

2010 • 38 citations

The fructification of Czekanowskia and its allies

1951 • 38 citations

ON THE SEEDLING STRUCTURE OF GYMNOSPERMS1

1906 • 37 citations

On Some Disaccate Pollen Grains of Permian to Middle Jurassic Age

1962 • 36 citations

INVESTIGATIONS OF NORTH AMERICAN CYCADEOIDS: POLLINATION MECHANISMS IN CYCADEOIDEA

1972 • 36 citations

STUDIES OF SEED FERN POLLEN: DEVELOPMENT OF THE EXINE IN MONOLETES (MEDULLOSALES)

1982 • 36 citations

Evolutionary trends in fossil gymnosperm pollen

1976 • 36 citations

SPERMOPTERIS, A NEW GENUS OF PTERIDOSPERMS FROM THE UPPER PENNSYLVANIAN SERIES OF KANSAS

1960 • 35 citations

THE MORPHOLOGY AND AFFINITIES OF GNETUM

1916 • 35 citations

More evidence for a slender growth habit in Mesozoic cycadophytes

1976 • 35 citations

Ancestors, Species, and Cladograms—Remarks on the Symposium

1979 • 35 citations

Cladostrobus and the systematics of cordaitalean leaves

1975 • 34 citations

QUAESTORA AMPLECTA GEN. ET SP. N., A STRUCTURALLY SIMPLE MEDULLOSAN STEM FROM THE UPPER MISSISSIPPIAN OF ARKANSAS

1980 • 34 citations

Studies in the Trigonocarpales. Part II. Taxonomic Problems and a Revision of the Genus Pachytesta

1946 • 33 citations

A reassessment of Taeniopteris daintreei from the Victorian Early Cretaceous: a member of the Pentoxylales and a significant Gondwanaland plant

1985 • 32 citations

RELLIMIA THOMSONII (PROGYMNOSPERMOPSIDA) FROM THE MIDDLE DEVONIAN OF NEW YORK STATE

1977 • 32 citations

Lower Carboniferous pteridosperm cupules and the origin of angiosperms

1977 • 31 citations

Pollen of Ephedra from the Chinle Formation (Upper Triassic) and the Genus Equisetosporites

1960 • 31 citations

CORDAIANTHUS DUQUESNENSIS SP. NOV., ANATOMICALLY PRESERVED OVULATE CONES FROM THE UPPER PENNSYLVANIAN OF OHIO

1982 • 31 citations

SINOPSIS DE LAS CORYSTOSPERMACEAE (CORYSTOSPERMALES, PTERIDOSPERMOPHYTA) DE ARGENTINA. I. HOJAS

2013 • 31 citations

PERMINERALIZED ALETHOPTERIS FROM THE UPPER PENNSYLVANIAN OF OHIO AND ILLINOIS

1982 • 29 citations

Occurrence of Hermaphrodite Flowers and the Development of Female Gametophyte in Ephedra intermedia Shrenk et Mey

1950 • 27 citations

Pteridophytic features in some Lower Carboniferous seed megaspores

1969 • 26 citations

INVESTIGATIONS OF NORTH AMERICAN CYCADEOIDS: EARLY OVULE ONTOGENY

1972 • 25 citations

The Stomata of Gnetum

1961 • 25 citations

X. On the microsporangia of the pteridospermeæ, with remarks on their relationship to existing groups

1906 • 25 citations

On the Prothallus of Lagenostoma ovoides Will

1944 • 24 citations

A NEW SCHEME OF CLASSIFICATION OF THE CONIFERS

1975 • 24 citations

COMPARATIVE ANATOMY OF THE SEED COATS OF GNETUM AND THEIR PROBABLE EVOLUTION

1969 • 24 citations

PETRIFIED NEUROPTERID FOLIAGE FROM A MIDDLE PENNSYLVANIAN COAL BALL

1978 • 24 citations

Palaeo-succession of earliest angiosperm evolution

1977 • 23 citations

Monophyletic Classification and Evolution

1956 • 23 citations

Paracytic (Syndetocheilic) Stomata in Carboniferous Seed Ferns

1976 • 22 citations

On seeds containing Eucommiidites troedssonii pollen from the Jurassic of Grojec, Poland

1968 • 21 citations

ON MESOXYLON, A NEW GENUS OF CORDAITALES.—PRELIMINARY NOTE

1910 • 20 citations

Parallel Evolution in Leaf Venation: an Alternative View of Angiosperm Origins

1970 • 19 citations

Glossopterid Leaves from the Middle Jurassic of Oaxaca, Mexico

1969 • 19 citations

III. A petrified Williamsonia from Scotland

1913 • 19 citations

Chemosystematics of the Gnetatae and the Chemical Evolution of Seed Plants¹

1984 • 18 citations

The morphology and ultrastructure of Gothania (cordaitales) pollen

1980 • 18 citations

The Mysterious Origin of Flowering Plants

2007 • 17 citations

MITROSPERMUM VINCULUM SP. NOV., A CARDIOCARPALEAN OVULE FROM THE UPPER PENNSYLVANIAN OF OHIO

1980 • 16 citations

Sandrewia, n. gen., a problematical plant from the Lower Permian of Texas and Kansas

1975 • 16 citations

The Vessel in Seed Plants

1921 • 16 citations

SINOPSIS DE LAS CORYSTOSPERMACEAE (CORYSTOSPERMALES, PTERIDOSPERMOPHYTA) DE ARGENTINA. II. ESTRUCTURAS FERTILES

2013 • 15 citations

A New Species of Cardiocarpus in Kansas Coal Balls

1961 • 14 citations

The Tracheary Elements of Equisetum with Observations on the Ontogeny of the Internodal Xylem

1958 • 14 citations

ADVENTITIOUS BUDDING AND BRANCHING IN CYCAS

1910 • 13 citations

THE MEGAGAMETOPHYTE OF HYDRASPERMA TENUIS LONG FROM THE UPPER DEVONIAN OF IRELAND

1984 • 11 citations

A PHYLOGENETIC ANALYSIS OF EXTANT SEED PLANTS: THE NEED TO UTILIZE HOMOLOGOUS CHARACTERS

1982 • 11 citations

New interpretation of Gaussia (Vojnovskyales)

1981 • 11 citations

The Spermatozoid of Zamia chigua Seem

1977 • 11 citations

Seed-bearing Ottokaria-like Fructifications from India

1965 • 10 citations

A TETRAHEDRAL MEGASPORE ARRANGEMENT IN A SEED FERN OVULE OF PENNSYLVANIAN AGE

1979 • 10 citations

Gymnosperms and the Origin of Angiosperms

1948 • 10 citations

On the Fertile Shoots of Mesoxylon and an Allied Genus

1919 • 10 citations

MISPLACED PESSIMISM AND MISGUIDED OPTIMISM: A REPLY TO MABBERLEY

1984 • 7 citations

TWO FOSSIL PROTHALLI FROM THE LOWER COAL MEASURES.

1912 • 6 citations

Notes on the Morphology of certain Structures concerned in Reproduction in the Genus Gnetum. (Abstract.)

1915 • 5 citations

The Maüle Reaction and the Systematic Position of the Gnetales

1934 • 3 citations