CXVi PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



New Plants. — Messrs. Veitcli showed specimens of Viburnum 

 Davidii, an evergreen Viburnum with large, glossy leaves and corymbs 

 of small, whitish flowers, and Rhododendron concinnum and R. rufes- 

 cens, the latter a dwarf species, about 6 inches in height, with white 

 flowers about ^ inch in diameter, and having somewhat the habit of 

 R. intricatum. 



Hymenocallis x fesfalis. — Mr. Worsley showed spikes of this hybrid 

 raised by him between Ismene calathina ^ and Elisena longipetala. 

 The hybrid is remarkably vigorous in habit. 



Scientific Committee, June 6, 1911. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and ten 



members present. 



Rosa hemisphaerica. — The Kev. Canon Ellacombe sent flowers of 

 the sweetly-scented Rosa hemisj^haerica from a plant growing on a wall 

 in his garden. This yellow rose, which is very rare in gardens, is said 

 to flower only in very dry seasons. 



Iris diseased. — A rhizome of Iris pumila attacked by "rhizome 

 rot " was received. This disease is due to a bacillus, and is very difficult 

 to cure. The parts of the rhizome affected should be removed and 

 burnt as soon as the disease appears. 



Scientific Committee, June 20, 1911. 



Mr. J. T. Bennett-Poe, M.A., V.M.H., in the Chair, and nine 

 members present. 



Catasetum' Gliftonii.' — Mr. O'Brien, V.M.H., showed plants under 

 ihis name from the collections of Sir Trevor Lawrence, Bart., and 

 Sir Jeremiah Coleman, Bart., respectively. The flowers presented 

 several minor points of difference in coloration and in the form of the 

 lip, but both had a large callus upon the latter. No essential difference 

 was to be seen in habit. Mr. O'Brien considered them to be forms of 

 one species, a view with which Dr. Eendle, to whom they were referred, 

 concurred. Dr. Eendle regarded them as forms of the very variable 

 Catasetum Bungerothii, a Venezuelan species figured in Bot. Mag., 

 tab. 6,998. 



Malformed Cattleya. — Mr. O'Brien also showed a malformed 

 Cattleya lahiata, upon which Dr. Eendle commented as follows: The 

 dorsal sepal has become broad and short, resembling more the lip and 

 petals; the lateral petals have become shorter, resembling the lip in 

 colour, but slightly smaller; they are enclosed by the lip and convolute 

 with each other; the dorsal sepal, with lip and petals, formed a central 

 rosette ; the lateral petals are shorter than usual, but otherwise normal. 

 The column is reduced, forming a pillar-like structure bearing an 

 aborted anther." 



