116 TRANSACTIONS, NATUKAL HISTORY SOCIETY OF GLASGOW. 



Catalogue of British Plants, 21 not formerly recorded for Scot- 

 land, and 6 new to the British Flora " (see page 52). 



30th June, 1903. 



Mr. Peter Ewing, F.L.S., President, in the chair. 



Mr. John Renwick read a report of the Society's excursion to 

 Garrion and Mauldslie on the 30th May (see page 81), and Mrs. 

 Ewing sent her report of the excursion to Puck's Glen and Ben- 

 more on 13th June (see page 83). Both reports were interest- 

 ing, and some very beautiful photographs illustrative of several 

 of the scenes visited were exhibited by Mr. Reoch. 



The President exhibited Gymnospof-angium juniperinum, L., 

 a fungus found on the stem of the Juniper, and contributed the 

 following note on the exhibit : — 



" Gynvnosporangium juniperinum, L., belongs to the family 

 of the UredineJB, or Rust Fungi, one of the families included in 

 the alliance of the Basidiomycetes. It is a heteroecious fungus, 

 the aecidium or promycelium stage being produced on the 

 Mountain Ash (Fyrus Aiicuparia), the teleutospore, or resting 

 stage, on the common Juniper (Juniperus communis). 



" In the Uredinese a basidium, or ' small pedestal,' as the name 

 implies, arises from the cell of the teleutospore, and this 

 basidium is transversely septate, four cells being cut off at 

 the end of the tube, away from the spore. Each of these cells 

 produces a little process, and from each process a conidium is 

 abstricted. In all the other families of the Basidiomycetes the 

 teleutospores are suppressed, and the basidia are directly con- 

 tinuous with the hyphae of the fungus. The conidia do not 

 arise laterally, but from four processes at the top of an un- 

 segmented basidium. The teleutospores appear towards the end 

 of the vegetative period. 



" The projecting lobes on the Juniper consist of masses of these 

 teleutoscopes imbedded in mucilage. When wet they swell up, 

 the basidia are produced, and the conidia abstricted; the conidia 

 are then blown away, and if their fate should be to alight on 

 the leaves of the Mountain Ash, they proceed to penetrate the 

 tissue, and produce the secidium stage. 



" This is not the first time this fungus has been exhibited 

 before the members of this Society. In the year 1883 I find 



