i88 BOTANICAL GAZETTE [September 



Fig. 24. Same, Condition sometimes found in the floral axis. X55. 



Fig. 25. Same. Section from near the base of the peduncle, showing cor- 

 tical bundles outside the ring. X20. 



Fig. 26. P. hyhridus,. Section through the floral axis. X120. 



Fig. 27. Triglochin maritima. Transverse section through the floral axis, 

 showing a ring of collateral bundles. X25. 



Fig. 28. P. crispus. Transverse section through central cylinder. Xioc 



PLATE XV III 



* 



Fig. 29. Zostera marina. Transverse section through an intemode of the 

 ascending stem. X20. 



Fig. 30. Phyllospadix Scouleri. Transverse section through the ascending 

 stem at the upper part of the insertion of a leaf. X 15. 



Fig. 31. Cymodocea manatorum. Transverse section through an internode 

 of the stem. X25. ■ 



Fig. 32. Same. Transverse section through a node. X30. 



Fig. ;^^. Triglochin maritima. Transverse section through the central 

 cylinder of the rhizome. X25. 



Fig. 34. Scheuchzeria palustris. Transverse section through central cylin- 

 der of the rhizome. X30. 



