— 23 — 



and which when they develop bring on small blisters of 0.31 to 0.39 inch in size. 

 Each of these spores carries a vibratile cilium. These zoospores develop upon the 

 petioles of the leaves, where they are carried by drops of rain or dew, lines of blis- 

 ters brought more or less near together. These blisters which wind around the 

 leaves in irregu'lar spirals, are filled with fertile filaments. When the zoospores 

 are accumulated on a secondary rib, or the mid-rib of a leaf, at from i to i 1-2 

 inch from the end, they unite in a shorter and lesser blister often curled, closed 

 and filled with filaments. Some time after the formation of these blisters, the 

 fertile filaments appear here and there on the outer surface of the deformed part. 

 The mycelium, when carried from the Shepherd's Purse plant to the cabbage, ap- 

 pears on the last in the form of blisters having a diameter of three inches by 

 about two inches covered with mycelium filaments. 



It is important, if one is anxious to get rid of the White Cystopus, to wage 

 war on the Shepherd's Purse plant first. Then if some forgotten individuals of 

 that plant have caused the propagation of the fungus and its spread upon cab- 

 bages or turnips, attention must be paid to the young plants. Discoloured spots 

 having a yellow appearance indicate the presence of the Cystopus. Frequently, 

 by eradicating the first invaded plants, the remainder of the bed is saved. If the 

 spreading of the cabbage mildew has been discovered too late, the lower leaves of 

 the headed cabbages should be picked off and burnt. No stalks should be left in 

 the ground, for, if left they are prone to send forth new leaves continuing to 

 spread the invasion. After all this has been cleared, if the disease has developed 

 strongly, it is prudent to sprinkle the ground with a solution of sulphate of cop- 

 per to insure the destruction of the spores spread on the ground. 



A PLEA FOR THE PUBLICATION 



of a 

 NEW ILLUSTRATED FLORA of the PROVINCE of QUEBEC 



Rev. Brother Victorin, Longueuil, P. O. 



In answer to the invitation of our most active and devoted President. I at 

 first intended, — to comply with a well-established tradition in our Society, — to 

 rouse indignation about this or that poor little creature charged with the grievous 

 offence of trying to "live its life" by our side, in our orchards, gardens and 

 meadows. But, under the impression that this barbarous plea will be more con- 

 sonant with the personal feelings of some here present, I leave it to them, and 

 I will rather draw your attention to a question of indirect interest, already de- 

 bated in our Societv. 



In fact, I read'in the Annual Report of "The Quebec Society for the Protec- 

 tion of Plants" for 1911-1912: "Many years ago, abbe Provancher published a 

 work entitled: Flore du Canada" in two volumes, which has been out of print 

 for some years and is now very difficult to procure. No work on systematic bo- 

 tanv has taken its place in Quebec, consequently this phase of the study of plant 

 life' has been to a large extent neglected in the French Schools of the Province. 

 I would therefore suggest that the Society request the Government of the Prov- 

 ince not only to reprint a revised edition of Provancher's work, but also to publish 



k 



