Results 101 to 110 of about 248 (121)

Ceratophyllaceae

exaly   +2 more sources

Floral development and phyllotactic variation in Ceratophyllum demersum (Ceratophyllaceae)

American Journal of Botany, 2003
The 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, Akiko, Shimizu, Hideaki, Ohba   +2 more
openaire   +2 more sources

FOSSIL CERATOPHYLLUM (CERATOPHYLLACEAE) FROM THE TERTIARY OF NORTH AMERICA

American Journal of Botany, 1990
Fossil 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, Donald H. Les, David L. Dilcher   +2 more
openaire   +1 more source

GENETIC DIVERSITY IN THE MONOECIOUS HYDROPHILE CERATOPHYLLUM (CERATOPHYLLACEAE)

American Journal of Botany, 1991
This 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.
openaire   +1 more source

The Taxonomic Significance of Plumule Morphology in Ceratophyllum (Ceratophyllaceae)

Systematic Botany, 1985
The 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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Comparative developmental morphology of two populations of Ceratophyllum L. (Ceratophyllaceae) and their taxonomy

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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Development of structure-less pollen wall inCeratophyllum demersum L. (Ceratophyllaceae)

Journal of Plant Research, 1995
Developmental process of structure-less exine is studied in a hydrophilous plant,Ceratophyllum demersum L., with electron microscopy. The plant shows a characteristic feature in tetrad formation. A callose wall is not synthesized and exine initiation does not occur during the tetrad stage.
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Ceratophyllum (Ceratophyllaceae) from the miocene of eastern China and its paleoecological significance

Systematic Botany, 2005
Vegetative shoots and a newly discovered fruit of Ceratophyllum are described from diatomite of the middle Miocene Shanwang Formation in Shandong Province, eastern China. Based on the fruit, the fossil can be referred to C. muricatum subsp. muricatum.
Wang, Yu-Fei, Ferguson, David-Kay, Li, Cheng-Sen   +2 more
openaire   +1 more source

Familia Ceratophyllaceae

2015
J. C. Ospina, C. A. Zanotti
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Flora of Panama. Part IV. Family 61. Ceratophyllaceae

Annals of the Missouri Botanical Garden, 1980
Robert E. Woodson, Robert W. Schery, W. G. D'Arcy   +2 more
openaire   +1 more source