81G REPORT— 1902. 



As regards rare plants in the flora, Lough Xeagh is phytologically one of the 

 most interesting spots, not only in the district, but in Ireland. Here Galamayrostia 

 (ttricta VAX. Hookeri is endemic ; Tolypella nidijica (if the determination be 

 correct) has its only British station ; Carex huxbaumii has its only other British 

 station in Aberdeenshire ; while Spiranthes romnnznffiaua is, outside the Bana 

 basin, in Europe found only in Co. Cork. The Antrim basalt plateau yields 

 Saxifrafja hirculus, Orobanche rubra (in plenty), Eqnisetum trachyodon ; while 

 the rarest plants of Down are Elatine hijdropiper and Zannichdlia polycarpa. 



4. The Niideua of the Cyanophycea. By Harold Wager. 



WEDNESDAY, SEPTEMBER 17. 



The following Papers were read : — 



1. A Disease of the Gooseberry, with Notes on Botrytis and Sclerotium. 

 By Miss Ansie Lorrain Smith. 



The disease attacks the hard stem of the bushes above and below the ground 

 level. The inner bark is permeated and completely destroyed by the mycelium 

 of a fungus. The outer bark cracks and splits, and sclerotia are formed on the 

 outside or half embedded in the cortex. A Poli/actis type of Botri/tis with small 

 spores was found growing on the wood laid bare by the peeling-otf of the bark, 

 and also on some of the sclerotia. 



Culture experiments produced more Botri/tis, and from one of the sclerotia 

 there grew both the Botrytis and a I'eziza form which proved to be identical with 

 Sderotinia fuchelicma, a disease of the vine, but which in the latter only attacks 

 the tender parts of the plant. 



Measurements and cultures were made of various forms of Botrytis and of 

 Monilia, and the results compared. Compact clumps of mycelium are formed in 

 them all, which vary in the different species, and may be incipient sclerotia. 



Crystals of oxalate of lime were formed in the Botrytis cultures, in one case 

 sufficient to form a white deposit at the base of the gelatine. 



2. On the Morphology of the Flowers in certain species o/" Lonicer.a. 

 By E. A. Newell Arder, M.A., F.G.S. 



The genus Lonicera, L., includes some hundred species, of which about seventy 

 belong to the section Xylosteum. The inflorescence of members of this section is 

 remarkable in that the gynojcea of a two-flowered dichasium are more or less 

 completely united together, a character which is made use of as a point of 

 systematic importance. The normal occurrence of synant?iy of this particular 

 type is comparatively rare, but it is also found among members of certain other 

 orders, e.g., Bubiacem. 



A study of the morphology of the flowers of species belonging to the Xylo- 

 steum group shows that the union of the gynoecea is not efl'ected in the same way 

 in all species. A series of intermediate stages can also be found leading up to 

 such marked types as Lonicera carulea, L. 



In L. xylosteum, L., and L. alpigena, L., the two inferior ovaries are united in 

 one plane by the union of their receptacular walls. This union is very complete 

 in the latter species, and probably represents the perfection of this type of 

 adaptation. 



Intermediate stages may be found in Z. nigra, L., and other species, in 

 which tlie same result — the coalescence of the two fruits — is attained in another 

 way. Here the gyncecea are for the most part free from one another, but 

 surrounded by an outer parenchymatous tissue, arising from the basei This tissue 



