XXviii PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



Yucca flaccida. — From Mr. Burbidge, Trinity College Garden, 

 Dublin, came leaves of this plant, bearing at or near the margin, 

 and sometimes from one surface, sometimes from the other, 

 short tubular, horn-like processes, the significance of which is 

 not apparent. Dr. Masters gave the details of the histological 

 structure of the leaf, the main points of interest being that, in 

 addition to the central row of vascular bundles, there are two 

 other seiies of smaller bundles, one between the central bundle 

 and the upper epiderm, the other between the centre and the 

 lower epiderm. In the central bundles the relation of the xylem 

 and phloem is normal, that is to say, the xylem is directed 

 towards the centre of the leaf, the phloem towards the lower 

 epiderm. In the lower or outer series of bundles the phloem is 

 external, the xylem central. In the upper or inner series the 

 phloem is also external, the xylem internal, so that the section 

 of the central bundles and of the uppermost ones taken together 

 resembles a section of a stem. In the horn-like portions, the 

 palisade cells are absent, and the cells are nearly uniform in size 

 and shape, the vascular bundles arranged in a ring, each bundle 

 having its bast towards the periphery, its wood towards the 

 centre. Thus, while the flat portion has the structure of a leaf 

 with indications of stem structure also, the horn-like portion 

 assumes completely the appearance of an axis. 



GENERAL MEETING. 

 March 10, 1891. 

 Sir John T. D. Llewelyn, Bart., in the Chair. 

 Elections. 



Felloivs, 34. — James Allen, J. R. Berry, W. Edward Berry, 

 W. B. Boyd, Rev. A. O'Brien Brandon, Arthur Bull, J. O.Carter, 

 Mrs. G. Crutcher, W. H. Crawford, James Fenning, E. P.Frost, 

 E. W. Grimwade, T. H. P. Hartley, A. C. Hayes, H. H. Hurnard, 

 H. A. Jones, Rev. E. S. Lowndes, George S. Marivell, A. S. 

 Mark, C. Matthews, James T. M'Dougall, T. J. Mills, Charles 

 Murless, Mrs. Meredyth Richards, James F. Ridley, C. S. 

 Ritchie, John K. Rowe, J. Oldrid Scott, J. Leslie Sherrin, 

 Thomas W. Short, Mrs. Watson Smith, E. T. Turner, R. G. 

 Webster, M.P., James Wilson, jun. 



