Results 91 to 100 of about 252 (122)

An Early Cretaceous fruit with affinities to Ceratophyllaceae†

American Journal of Botany, 2009
A new genus and species with affinities to Ceratophyllaceae from the Lower Cretaceous of Kansas, USA is reported. The fruits of Donlesia dakotensis gen. et sp. nov. are smooth achenes with two winged lateral spines, two winged facial spines, one stylar spine, and a long peduncle with a distinctive groove. The facial spines are arranged perpendicular to
David L. Dilcher, Hongshan Wang
exaly   +3 more sources

THE ORIGIN AND AFFINITIES OF THE CERATOPHYLLACEAE

Taxon, 1988
SummaryHistorically, the phylogenetic affinities of the Ceratophyllaceae have been vague, however, recent authors have favored a close relationship of the family to the genus Cabomba of the Nymphaeales. An evaluation of critical character distributions by cluster analyses confirmed relationships of Cabomba with Brasenia, Euryale with Victoria, and ...
Donald Henry Les
exaly   +2 more sources

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.
Masamichi Takahashi
exaly   +2 more sources

The Evolution of Achene Morphology in Ceratophyllum (Ceratophyllaceae), IV. Summary of Proposed Relationships and Evolutionary Trends

Systematic Botany, 1989
Multivariate analyses of species and subspecies of Ceratophyllum confirm the phenetic integrity of all groups recognized in preceding parts of this series. Relative morphological similarity decreases hierarchically with the greatest degree existing among conspecific subspecies and less characterizing separate species and certain species pairs.
Donald Henry Les
exaly   +2 more sources

CERATOPHYLLACEAE

2020
Fritz H. Schweingruber, Andrea Kučerová, Lubomír Adamec, Jiří Doležal   +3 more
exaly   +2 more sources

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.
Cheng-Sen Li, Yu-Fei Wang, David K Ferguson   +2 more
exaly   +2 more sources

Ceratophyllaceae

2017
Meihua Deng
exaly   +2 more sources

CERATOPHYLLACEAE

1957
exaly   +2 more sources

Ceratophyllaceae

1995
exaly   +2 more sources

Ceratophyllaceae

exaly   +2 more sources