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A male flower of the Pentoxyleae with remarks on the structure of the female cones of the group
| Content Provider | Birbal Sahni Institute of Paleobotany |
|---|---|
| Author | Vishnu-Mittre |
| Abstract | Under the name of Sahnia nipaniensis gen. etsp. nov. the author describes some specimens whichhe believes to be the male flowers of the Pentoxyleae. These were borne apically on dwarf shoots closely resembling those of Pentoxylon Sahnii Srivastava. The flower consists of filiform spirally branched microsporophylls, fused proximally to form a disc which surrounds a broad and conical receptacle. The unilocular sporangia are borne at the ends of short branches of the sporophylls. Pollen grains are monocolpate and boat-shaped. In young flower the microsporophylls are surrounded by a whorl of deciduous bracts.The infructescence of Carnoconites laxum andseveral specimens (showing longitudinal section)of the infructescence of C. compactum have alsobeen discovered. The infructescence of C. laxumdiffers from that of C. compactum in having muchshorter pedicels and much longer female cones.The infructescence of C. compactum differs from the reconstruction made by Professor Sahni in theabsence of bifurcation of the pedicels and in thearrangement of the cones. |
| Starting Page | 75 |
| Ending Page | 84 |
| File Format | |
| Volume Number | 2 |
| Language | English |
| Publisher Date | 1953-01-01 |
| Access Restriction | Open |
| Content Type | Text |
| Educational Use | Research Reading |
| Resource Type | Article |
| Education Level | Under Graduate Post Graduate |
| Subject | Paleobotany; fossil microorganisms |
