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The classification of gymnospermous plants
| Content Provider | Birbal Sahni Institute of Paleobotany |
|---|---|
| Author | Pant, Divya Darshan |
| Abstract | Various systems of classification of the gymnospermous plants are briefly reviewed. Arnold's classification (Bot. Gaz., 1948) istentatively modified as follows:Division: Cycadophyta- Class 1. Pteridospermopsida, Orders: 1. Lyginopteridales, 2. Medullosales, 3. Glossopteridales, 4. Peltaspermales, 5. Corystospermales, 6. Caytoniales; Class 2. Cycadopsida, Order: 7. Cycadales; Class 3. Pentoxylopsida, Order: 8. Pentoxylales; Class 4. Cycadeoideopsida, Order 9. Cycadeoideales.Division: Chlamydospermophyta- Class Gnetopsida, Orders: 1. Gnetales (restricted to Gnetum), 2. Welwitschiales.Division: Coniferophyta- Class 1. Coniferopsida,Orders: 1. Cordaitales. 2. Ginkgoales; 3. Coniferales; Class 2. Ephedropsida. 4. Ephedrales; Class 3. Czekanowskiopsida. Order: 5. Czekanowskiales; Class 4. Taxopsida. Order: 6. Taxales.The position of the Pentoxylales, Ephedrales, Glossopteridales and Czekanowskiales is discussed in the light of recent research. |
| Starting Page | 65 |
| Ending Page | 70 |
| File Format | |
| Volume Number | 6 |
| Language | English |
| Publisher Date | 1957-01-01 |
| Access Restriction | Open |
| Content Type | Text |
| Educational Use | Research Reading |
| Resource Type | Article |
| Education Level | Under Graduate Post Graduate |
| Subject | Paleobotany; fossil microorganisms |
