Results 101 to 110 of about 252 (122)
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Floral development and phyllotactic variation in Ceratophyllum demersum (Ceratophyllaceae)
American Journal of Botany, 2003The floral development of staminate and pistillate flowers of Ceratophyllum demersum was observed, with particular focus on the phyllotactic variation in staminate flowers, using scanning electronic microscopy (SEM). We discerned patterns of development of some important new morphological features, e.g., the difference and discontinuity between the ...
Akitoshi, Iwamoto +2 more
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FOSSIL CERATOPHYLLUM (CERATOPHYLLACEAE) FROM THE TERTIARY OF NORTH AMERICA
American Journal of Botany, 1990Fossil fruits and a vegetative axis assignable to the extant genus Ceratophyllum are described from four North American Tertiary localities. Fossil fruits assignable to the extant species C. muricatum and C. echinatum are reported from the Eocene Green River and Claiborne formations, and the Miocene Esmerelda Formation, respectively. An extinct species,
Patrick S. Herendeen +2 more
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A new species of Donlesia (Ceratophyllaceae) from the Early Cretaceous of Kansas, USA
Review of Palaeobotany and Palynology, 2018Abstract A new species of Donlesia (Ceratophyllaceae) from the Early Cretaceous Cheyenne Sandstone of Kansas, USA is reported. The fruits of Donlesia cheyennensis sp. nov. are achenes with four lateral spines, a stylar spine, and a long pedicel. The four lateral spines are arranged on two perpendicular planes.
Hongshan Wang, David L. Dilcher
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Botanical Journal of the Linnean Society, 1981
Developmental morphology of two natural populations of Ceratophyllum inhabiting the waters of Delhi has been investigated under natural conditions and in aseptic culture. Both the populations show an extreme degree of adaptability to hydrophily. The embryo is unusually highly developed and contains 12-14 whorls of leaves and a few lateral buds. The two
ANITA SEHGAL, H. Y. MOHAN RAM
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Developmental morphology of two natural populations of Ceratophyllum inhabiting the waters of Delhi has been investigated under natural conditions and in aseptic culture. Both the populations show an extreme degree of adaptability to hydrophily. The embryo is unusually highly developed and contains 12-14 whorls of leaves and a few lateral buds. The two
ANITA SEHGAL, H. Y. MOHAN RAM
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GENETIC DIVERSITY IN THE MONOECIOUS HYDROPHILE CERATOPHYLLUM (CERATOPHYLLACEAE)
American Journal of Botany, 1991This study surveys genetic variation in two clonal, monoecious, water‐pollinated species that differ in their extent of sexuality and distributional range. Electrophoresis was used to quantify allozyme variability in 12 Wisconsin populations of the widespread Ceratophyllum demersum and the rare C. echinatum.
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The Taxonomic Significance of Plumule Morphology in Ceratophyllum (Ceratophyllaceae)
Systematic Botany, 1985The plumule morphology of the species of Ceratophyllum was studied for the purposes of: 1) determining the extent of variability in forking of the first epicotyl leaves, and 2) evaluating plumule features as taxonomic characters by assessing interspecific and intraspecific (interand intrapopulational) variation.
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2018
PDF version of Flore du Gabon, Volume 52, Ceratophyllaceae, Cymodoceaceae, Dioncophyllaceae, Haloragaceae, Onagraceae, Potamogetonaceae, Ruppiaceae.
Sosef, Marc +4 more
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PDF version of Flore du Gabon, Volume 52, Ceratophyllaceae, Cymodoceaceae, Dioncophyllaceae, Haloragaceae, Onagraceae, Potamogetonaceae, Ruppiaceae.
Sosef, Marc +4 more
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A new species of (Ceratophyllaceae) from the Early Cretaceous of Kansas, USA
Review of Palaeobotany and Palynology, 2018David L. Dilcher, Hongshan Wang
exaly