Fossil Plants a Text book for Students of Botany And Geology
Fossil Plants a Text book for Students of Botany And Geology
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There is, as Nathorst states, a close agreement in plan between Weltrichia, Cycadocephalus, and Williamsonia, and indeed it is not clear in what respects Weltrichia is sufficiently distinct 1 Saporta (91) p. 191, Pis. 253255. 2 See page 428.
3 Nathorst (09) p. 28. 4 Ibid. (II 2 ); (12 2 ).
xxxvn] WELTRICHIA 477 from Cycadocephalus to be retained as a separate genus. Our knowledge of Weltrichia is, however, less complete than in the case of Cycadocephalus and Williamsonia. It is noteworthy that ...Braun's specimens and those on which Cycadocephalus was founded were obtained from Rhaetic rocks. An account of Weltrichia has also been published by Schuster 1 who differs from Nathorst in his interpretation of the type-specimens : he considers that another fossil described by Braun and named by him Palaeoxyris microrhombea is the central, female, portion of a Weltrichia flower, a view that is not supported by any sub- stantial evidence. The specimens referred by Braun to Palaeoxyris and afterwards transferred by Schimper 2 to the genus Lepidanthium are too obscurely preserved to be determined with any degree of confidence, and their connexion with Weltrichia is purely hypo- thetical.
What to read after Fossil Plants a Text book for Students of Botany And Geology?
You can find similar books in the "Read Also" column, or choose other free books by A C Albert Charles Seward to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
There is, as Nathorst states, a close agreement in plan between Weltrichia, Cycadocephalus, and Williamsonia, and indeed it is not clear in what respects Weltrichia is sufficiently distinct 1 Saporta (91) p. 191, Pis. 253255. 2 See page 428.
3 Nathorst (09) p. 28. 4 Ibid. (II 2 ); (12 2 ).
xxxvn] WELTRICHIA 477 from Cycadocephalus to be retained as a separate genus. Our knowledge of Weltrichia is, however, less complete than in the case of Cycadocephalus and Williamsonia. It is noteworthy that ...Braun's specimens and those on which Cycadocephalus was founded were obtained from Rhaetic rocks. An account of Weltrichia has also been published by Schuster 1 who differs from Nathorst in his interpretation of the type-specimens : he considers that another fossil described by Braun and named by him Palaeoxyris microrhombea is the central, female, portion of a Weltrichia flower, a view that is not supported by any sub- stantial evidence. The specimens referred by Braun to Palaeoxyris and afterwards transferred by Schimper 2 to the genus Lepidanthium are too obscurely preserved to be determined with any degree of confidence, and their connexion with Weltrichia is purely hypo- thetical.
What to read after Fossil Plants a Text book for Students of Botany And Geology?
You can find similar books in the "Read Also" column, or choose other free books by A C Albert Charles Seward to read onlineMoreLess
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