NEW PLANTS FROM ASSAM. 



113 



Fig. 11 Long section of a sterile seed towards the middle of the placenta, shewn to be lined bj a 

 membrane. 



12. Outer view of lowermost and perfect seed. 



13. Inner of ditto. 



14. Ditto ditto longitudinal section, neck of the second integument exposed. 



15. Portion of the outer integument, highly magnified. 



16. Embryo, one colyledon removed. 



17. One of the persistent anthers. 



18. Ditto, transverse section. 



All the above more or less magnified. 

 Plate XVII. Left half. Podostemon Wallichii. 

 Fig. 1. Axis of inflorescence in a young state with a portion of the frond. 



2. Ditto more advanced. 



3. Ditto ditto after the dehiscence of the anthers. 



4. Flower viewed laterally ; one of the abortive stamina in situ, the other displaced. 



5. Ditto viewed on the outer face. 



6. Abortive anther, 



7. Pollen ; the lowermost represent two after immersion in water. 



8. Transverse section of ovarium. 



9. Young ovule. 



10. Ditto a little more advanced. 



11. Matnre ovule; outer coat half cut away longitudinally, exposing the nucleus. 



12. Capsule at the period of dehiscence. 



13. Ditto after dehiscence in the dry state. 



14. Seeds. 



15. Seed moistened. 



16. Ditto after immersion in water. 



17. Ditto immersed in water and slightly pressed. 



18. Embryo. 



Plate XVII. Right half. Podostemon Griffithii. 



Fig. 1. Axis of inflorescence in a young state, upper or inner face. 



2. Ditto ditto outer or under face. 



3. Flower of ditto detached, outer view. 



4. Column of ditto with portions of the two lateral stamina, inner view. 



5. Upper view of axis of inflorescence during flowering. 



6. Ditto ditto, under view. 



7. Outer view of perfect flower, lateral and abortive sta-mina displaced. 



8. Transverse section of anther before dehiscence. 



9. Pollen. 



2 D 



