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An Early Cretaceous fruit with affinities to Ceratophyllaceae
American Journal of Botany, 2009A 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 Dilcher
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THE ORIGIN AND AFFINITIES OF THE CERATOPHYLLACEAE
Taxon, 1988SummaryHistorically, 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 ...
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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.
David Dilcher, Hongshan Wang
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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 H Les
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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 H Les
exaly +2 more sources