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Studies on the fossil flora of Nipania (Rajmahal Series), India - Pentoxyleae
| Content Provider | Birbal Sahni Institute of Paleobotany |
|---|---|
| Author | Vishnu-Mittre |
| Abstract | The paper describes several new anatomical details regarding the vegetative remains of the Pentoxyleae.In the genus Pentoxylon Srivastava stems possessing more (8-9) or less (3-4) than the usual number of the steles are described. Besides the scalariform pitting, bi-and multiseriate medullary rays-characters not known before-are also described. The genus has been diagnosed for the first time.The apical region of a dwarf shoot of Pentoxylon sahnii is described.The genus Nipaniophyllum Sahni is reinvestigated and consequently the diagnosis of both the genus and the species N. raoi Sahni emended. The stomatain the genus are shown to be non-bennettitaleanin nature.The stems of Nipanioxylon guptai Sriv. are described.In the light of new information along with the previously known facts it is shown that the Pentoxyleae is not a synthetic group and belongs to the Cycadophyta. It is the most primitive group amongst the cycadophytes and should rank with the Benuettitales and the Cycadales. |
| Starting Page | 31 |
| Ending Page | 46 |
| 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 |
