SCIENTIFIC COMMITTEE. 



xliii 



intricatis, 17 ^ cr., intervallis brevibus conidiophoras capitatas 



sparsas ferentibus ; conidiophoris simplicibus, septatis vel continuis, 

 17 /a - 27 p longis, 17 ft- 2*4 fA latis, fastigatis, unico acrogeno capitulo 

 parum mucoso ornatis ; capitulis globosis ±3*5 i l ~ 7 ^ dia., ciebras 

 sporas (quatuordecim pluresve) continentibus ; sporis hyalinis, diversi- 

 formibus, ellipsoideis, ovalibus vel oblongis, rectis vel leviter curvatis 

 ±7 jux 1-17 //.." On Aleyrodes vaporariorum both imago and 

 larva infesting leaves of Centropogon in R.H.S. Gardens, Wisley. 

 Differs from Cephalosporium Lecanii in colour and in dimensions of 

 conidiophores, capitula, and spores. 



Floral Malformations. — Mr. E. Mann, Gill Street, Charters Towers, 

 Queensland, sent examples of Coreopsis showing virescence and pro- 

 liferation of the capitula ; Angelonia showing virescence ; virescent 

 Antirrhinum ; virescent Petunia ; virescent Zinnia ; and proliferous and 

 virescent Pelargoniums ; all picked in his garden in December last. He 

 attributed the remarkable number of malformations to the extraor- 

 dinarily dry season which they had just passed through, but no informa- 

 tion was forthcoming as to the purity or otherwise of the stock sown. 



Scientific Committee, March 16, 1915. 



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



members present. 



Tricotyledonary Sycamores. — Mr. W. H. Fletcher, of Aldwich 

 Manor, Bognor, wrote : " Although at p. 371 of Dr. Masters' ' Vegetable 

 Teratology ' mention is made of the fact that seedlings of the Syca- 

 more may often be met with with divided cotyledons, no mention seems 

 to be made of the after-growth of such seedlings. . . . This leads me 

 to send you the following in the hope that it may not be without 

 interest. Under a tree of the red-fruited variety of the Sycamore 

 (Acer Pseudoplatanus) in my shrubbery, seedlings with three cotyledons 

 are not .uncommon. I have collected some of these and grown them 

 in a cold frame for observation. I find that some of them produce 

 their leaves and axillary shoots in whorls of three so long as the leading 

 shoot remains unbroken. In the photograph sent (fig. 52) ten or 

 twelve of such whorls of three may be more or less clearly traced. The 

 lower part of the stem has been pruned up, but I can still count twenty- 

 eight such whorls. Some of the earlier ones have been lost in the 

 course of growth. The curious fact to my mind is that, though on 

 the main axis the leaves and shoots are all in threes, in every one 

 of these shoots a return is made to the normal decussate arrangement. 

 Though I have found a few with four cotyledons, I have not yet 

 grown one with leaves in whorls of four." 



Oak with Fungus Gall. — Mr. Fletcher sent also some branches of 

 Quercus pedunculata with roundish swellings here and there along 

 their length. They were apparently immature galls produced by 



