CXxiv PBOCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



Scientific Committee, August 13, 1912. 



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

 members present. 



Black Currants sporting. — Messrs. J. E. Pearson considered that 

 " reversion " in Black Currants was not due to pruning. A letter on 

 the same subject was read, in which the writer suggested that forcing 

 by too much manure or too hard pruning was the cause of the " throw 

 back " in Black Currants, and stated that the trouble is common 

 amongst the Worcestershire growers. 



Hazel. — Mr. O'Brien, V.M.H., showed Hazel Nuts with very large 

 foliaceous bracts, a condition he had found fairly common in the neigh- 

 bourhood of Hay wards Heath. 



Primula 'pycnoloha. — Messrs. J. Yeitch, Chelsea, showed a new 

 Western China Primula, P. pycnoloha, a species with small, dark 

 purple flowers, very large sepals, and foliage resembling a Megasea. 



Deinantlie. — ^Mr. Bennett-Poe, M.A., showed open flowers of the 

 genus Deinanthe ; the flowers are a deep blue, somewhat like Mecon- 

 opsis Wallichii in form. 



Scientific Committee, August 27, 1912. 



Mr. A. W. Hill, M.A., F.L.S., in the Chair, and eight 

 members present. 



Sweet Peas diseased.— Mr. Odell reported as follows: *' The 

 specimens from Suffolk submitted to the Committee were damaged by 

 the * Streak ' disease, due to Thielavia hasicola. Many of the leaves and 

 parts of the stem had also patches of Botrytis cinerea growing on them. 

 The roots were poorly developed, and showed signs of some check 

 earlier in the season, probably caused by overwatering in the early 

 summer. As a method of preventing the attack, deep and early 

 autumn cultivation of the soil intended for next season's crop of Sweet 

 Peas is recommended ; also a very moderate use of organic manure, 

 thin seeding, and frequent use of the Dutch hoe in place of watering 

 during early droughts." 



Epidendrum laterale. — Mr. O'Brien, V.M.H., showed for Mr. Neal, 

 of Penarth, a plant of Epidendrum laterale (Central America), and re- 

 marked that the inflorescence is produced on a rudimentary pseudo- 

 bulb, as in E. Stamfordianum^ (probably the only similar case), a 

 peculiarity that seems to show that the normal mode of flowering is 

 from the base of the mature pseudo-bulb. A Botanical Certificate was 

 awarded to this plant on the proposition of Mr. O'Brien. 



Mummy Pea. — Mr. A. Sutton showed a series of photographs illus- 

 trating several crosses with the so-called Mummy Pea, Pisum umhel- 

 latum. 



Lily faseiated. — Mr, Bowles presented a remarkable photograph of 

 Lilium candidum showing a faseiated double form, a condition figured 

 in Dr. Masters' Teratology. 



