BOTANICAL SOCIETY OF EDINBURGH XXV 



Dr. Malcolm Wilson read a paper on the Occurrence 

 of Perithecia of the Oak Mildew, in which he described the 

 morphology and distribution of the oak mildew, Micro- 

 sphaera alni, var. extensa, Salm. The occurrence of 

 perithecia on Quercus conferta from Macedonia was 

 recorded. 



Mr. J. A. Alexander communicated a paper on Palms 

 and their Produce, which was illustrated by a series of 

 photographs. 



Mr. W. E. Evans exhibited on behalf of Mr. James 

 Eraser and himself some alien plants from the Lothians — 

 being Ranunculi of the section Echinella, and explained 

 that this was the first of what they hoped would be a 

 considerable series of local aliens which would form the 

 basis of a paper on the subject later. 



Mr. W. E. Evans exhibited Gentaurea obscura, Jord., 

 forma, from the Pentlands, collected by Miss Roper in 

 September 1921. 



The following plants in flower were shown from the 

 Royal Botanic Garden : — Coelogyne Delavayi, Rolfe ; C. 

 yunnanensis, Rolfe ; Hesperochiron calif orn icus, S. Wats. ; 

 Oresitrophe ruj^ifraga, Bunge; Primula Duhernardiana, 

 G. Forrest; P. Fortunei, Vatke; P. Knuthiana, Pax; and 

 Rhododendron spinuliferum, Franch. 



APRIL 20, 1922. 

 James Whytock, Esq., in the Cliair. 



Colonel H. H. Johnston communicated a paper on 

 Additions to the Flora of Orkney, as recorded in Watson's 

 Topographical Botany, 2nd ed., 1883 (see p. 98). This 

 was illustrated by a large number of mounted specimens 

 of the more noteworthy additions. 



Mr. J. R. Matthews exhibited the hybrid Potamogeton 

 venustus from the River Earn. 



A number of plants in flower were shown from the 

 Royal Botanic Garden. 



