CXXxii PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 
Berwick. Spiral torsion does not seem uncommon in opposite-leaved 
plants. 
Humogen. — Mr. F. J. Chittenden, F.L.S., said that a further small 
test of humogen, obtained this time through Messrs. Sutton, from 
the Manchester Corporation, had been made at Wisley, with the 
result that previous findings had been confirmed, viz., that the mate- 
rial is not standardized (this like three other samples, but unlike the 
first received, gave no increase in yield), and that large doses are 
apt to have a bad effect upon germination (see p. 349). 
Ceropegia Sandersoni $ X C. gemmifera (J. — Flowering sprays 
of this hybrid were exhibited by Mr. Elwes. 
A note by Mr. H. F. Comber describing this plant appeared in 
the Gardeners' Chronicle for December 4, 1915, where, however, the 
male parent was erroneously stated to be C. Monteiroae. 
The cross occurred fortuitously in the gardens at Nymans, Hand- 
cross, but the plants were raised at Colesborne. 
Among the seedlings were found plants showing variations in 
shape and colour, and one plant produces flowers which are per- 
sistently deformed. The cross is fairly intermediate between the 
parents and somewhat resembles. C. x Rothii Gurke (C. Sandersoni 
x C. radicans) — a hybrid exhibited before the Committee by Mr. 
Ledger on November 7, 1911. 
Scientific Committee, August 15, 1916. 
Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and ten members 
present. 
Dianthus plumarius x D. Caryophyllus.^-A letter was read from 
Mr. F. N. Williams, F.L.S., saying that he was aware of no recorded 
name for the Carnation-Pink cross shown at the last meeting, although 
two species of the sections of the genus to which these plants belong, 
viz. D. attenuatus and D. monspessulanus, had been found to hybridize 
naturally in the Department of Pyrenees Orientales and had been 
named D. X Richteri. The Carnation-Pink cross has been made in 
gardens but apparently not named, and the Committee was of the 
opinion that the name D. X Allwoodii, proposed at the last meeting 
for this cross, would stand and be appropriate. 
Variation in Origanum vulgar Mr. J. Fraser, F.L.S., drew 
attention to specimens of wild marjoram which he showed, and com- 
mented upon variations which he had found among wild plants of this 
species. The variety megastachyum he had found on the Surrej^ 
Downs in 1913, but cultivated in his garden it became much larger 
and very much greener. Var. album is fairly common, and he had 
found a form near var. viride of ; the Continental botanists, but with 
slightly tinted bracts. 
