SCIENTIFIC COMMITTEE. 
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to 9 inches in diameter. He also drew attention to what he considered a case 
of infectious variegation in ivy. The green shoot of an ivy had become varie- 
gated when growing near one of Hedera Helix var. argyroneura in his garden. 
Inheritance in Sweet Peas. — Mr, W. Cuthbertson showed crosses between 
the Sweet Pea ' Etta Dyke ' (which has an open keel) and ' Constance Hinton.' 
In Fj, all the progeny had open keels and were white, while F.> gave about one 
to three of a decided pink colour. ' Etta Dyke ' is white. ' Constance Hinton ' 
white with buff edges and dark leaf axils. The cross ' Etta Dyke ' x ' Nora 
Unwin ' in F\ gave all whites with compressed keels, and F^ gave all whites. 
' Constance Hinton ' x ' Nora Unwin ' gave in Fi all whites, but showing buff 
in the standards, and all with compressed keels, and in Fg pinks as in the first 
case (' Etta Dyke ' x ' Constance Hinton '). 
Trifolium stellulatum. — Mr. H. Roberts showed a plant of T. stellulatum 
raised in his garden at Oxted through several generations from seed originally 
collected at Hythe. The plant had reached large proportions. On the suggestion 
of the Floral Committee a Botanical Certificate was unanimously recommended 
to this plant. 
Double Pap aver orientale. — Mr. Bowles showed a flower of Papaver orientale 
in which the petals were three-ranked and in which the capsule had split and 
had developed petals from the interior. 
Scientific Committee, July 13, 1920. 
Mr. E. A. Bowles, M.A., in the Chair, and six members present. 
Various Fruits. — Mr. Bowles showed fruit of Erodium gruinum to illustrate 
the action of the awn in burying the seed. He also showed fruit of Viburnum 
fragrans, now fruiting in his garden. Mr. Farrer had reported the fruit of this 
shrub to be edible, but it is very small. 
White-fruited Elder. — Mr. Eraser showed examples of the white-fruited form 
of the common elder which he had found growing wild near Ashtead Common, 
Surrey. 
Hybrid Lily. — Mr. Dykes showed a hybrid between Lilium speciosum x 
(L. sulphureum^ x L. regale). The flower as shown had no particularly 
remarkable characteristics. 
Leaf Division at Will, — Colonel Rawson showed a Tropaeolum tuberosum 
stem, the leaves of which, he stated, had been divided at will by selective screen- 
ing, thus repeating the experiment of a previous year. In addition, leaves 
which opened three-lobed had been made four-lobed within three days, and if 
two leaves developed at the same node they were not necessarily divided alike. 
He also showed petals of a Hugh Dickson Rose, whose change of colour to an 
indigo-crimson " had been traced to the reduction in the water supply by a 
caterpillar living among them." 
Scientific Committee, July 27, 1920. 
Mr. E. A. Bowles in the Chair, with three members and Mr. E. H. Wilson 
(visitor) present. 
Fertilization of Arum maculatum. — Mr. Marsden Jones showed a series of 
photographs illustrating the part played by two-winged flies in carrying pollen 
to stigma in the common wild Arum. 
Scientific Committee, August 24, 1920. 
Mr. J. W. Odell in the Chair, with five members present. 
The late Dr. J. G. Baker. — The Committee learned with great regret that 
their oldest member, the only survivor of the members of the original Scientific 
Committee formed in 1865, Dr. J. G. Baker, F.R.S., had passed away. They 
unanimously desired the Secretary to convey to his family their condolences 
and an expression of the great regard in which Dr. J. G. Baker's life-work and 
personality were held. 
Astelia nervosa. — Mrs. C. Brown sent an inflorescence of this New Zealand 
plant, which is rarely seen in cultivation, and a leaf. The latter was over six 
feet in length, and the former had apparently ripe fruit as large as small peas 
