SCIENTIFIC COMMITTEE, NOVEMBER 29. 



clxxiii 



which are attacking the roots of a plant, when you lift it, to thoroughly 

 drench the soil with boiling water. This destroys any of the pests which 

 may be left in the ground. The soil from the roots of the lifted plant 

 should be removed as far as possible before it be replanted, and the roots 

 washed." 



Puccinia gentiance (Strauss). — The three following communications 

 were received from Dr. Plowright :— - " On Gentiana Amarclla on the Chalk 

 Downs near Salisbury (Mr. E. J. Tatum, September 19, 1904). Thi^ 

 Puccinia has not, I believe, been previously recorded as the host-plant in 

 England. It grew far away from cultivation, and can hardly have been 

 introduced, as the specimens found some years ago in Kew Gardens 

 probably were. The Puccinia was found in the following month 

 (October 1901) on the same host-plant, about seventeen miles distant 

 from the first locality." 



Rhizoctonia violacea (Tul.). — "This disease is not at all a common 

 one in this part of East Anglia, according to my experience. This year, 

 however, it has attacked certain crops of Carrots. The specimen sent 

 shows how the violet mycelium has eaten into the middle of the Carrot. 

 It has also attacked the apex and completely arrested the development of 

 the root. The specimen came from Terrington St. Clement, near King's 

 Lynn." 



Ustilago hypodytes (Schlecht.). — " The specimen sent was found by 

 Mr. E. J. Tatum, near Salisbury, in June last. The host is Bromus 

 credits— & plant on which the fungus is rare in England. It is, of 

 course, extremely improbable that the various forms on Triticum repens, 

 Elymus arcnarius, and Bromus crectus are identical." 



Lucombc Oak. — Mr. Elwes, V.M.H., exhibited acorns and cups from 

 a tree, the latter being like those of Quercus Cerris, this and the Cork 

 Oak having been the parents of this hybrid. It was seldom that the 

 acorns were not attacked by grubs. The numerous specimens of the 

 Lucombe Oak in existence are grafted plants. 



Scientific Committee, November 29, 1901. 

 Dr. Masters, F.R.S., in the Chair, and nine members present. 



Galls on Kepcta Glechoma.—Mv. Saunders, F.L.S., reported on these, 

 brought by the Rev. W. Wilks, as follows :— "The galls are by no means 

 uncommon on this plant. They are formed by the grub of one of the 

 Hymenopteimis gall-flies belonging to the family CynipidcB (Diastrophus 

 glechoma). The insect is now in the imago state, apparently quite ready to 

 leave the gall in the spring." 



Mignonette diseased.— -Mr. Saunders reported as follows upon plants 

 sent to the last meeting from Bexley Heath \—" The Mignonette is rather 

 a puzzle. The plants resemble in every particular, both externally and 

 internally, those I examined from another source, which were reported on 

 at the meeting on the 15th inst., but the latter were badly attacked 

 by eelworms. Just at the point where the root ends and the stem begins 

 there was a hollow space, and the cells round it were broken up : in this 

 space, and among the cells, were, in both the plants that I examined, 



