RHAETIC FLORAS
Summary 1. The Rhaetic Pteridophytes mainly belong to living families. 2. Several isolated families of seed plants existed in the Rhaetic. A large proportion of the genera of the Rhaetic seed plants are still incertae sedis . 3. The structure of the cuticle of the leaf is held to be an important aid...
| Published in: | Biological Reviews |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1931
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1469-185x.1931.tb01024.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-185X.1931.tb01024.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-185X.1931.tb01024.x |
| Summary: | Summary 1. The Rhaetic Pteridophytes mainly belong to living families. 2. Several isolated families of seed plants existed in the Rhaetic. A large proportion of the genera of the Rhaetic seed plants are still incertae sedis . 3. The structure of the cuticle of the leaf is held to be an important aid to the classification of Rhaetic seed plants. 4. Two zones are distinguishable in the plant‐bearing Rhaetic and Lower Lias of Europe and Greenland—the Thaumatopteris Zone, corresponding approximately to the Hettangian, and the Lepidopteris Zone, corresponding approximately to the Rhaetic. 5. No flora outside this area can yet be satisfactorily correlated with the Rhaetic. |
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