5 2 The Ottawa Naturalist [June- July 



exceedingly poisonous during the early stages of its growth when 

 the hoots were only an inch or two in length. The poison- 



ous element here was believed to be oxalic acid, which, in the 

 young shoots as well as in the tissue of the leaf, is very prevalent. 



In discussing the effects of Equisetum (Horse Tail), reference 

 was made to a statement in the book in question which claimed 

 that this plant produces the same effect when fed to cattle as 

 that produced by mouldy corn, viz., diarrhoea. 



Reference was made to the claim by Freeman that Lolium 

 temulentiim is poisonous in one part of the United States and not 

 in certain others. 



An example to show the poisonous effects of Zygadenus 

 venenosus Wats, on sheen, in southern Alberta, was cited by 

 Mr. Clark. 



In Lupines and certain other plants the seeds rather than 

 the vegetative parts of the plants are poisonous. 



In the well-known loco weed (Oxytropis Lambert i) barium 

 is generally believed to be the poisonous element. 



Water Hemlock was believed to be the most poisonous plant 

 of all those belonging to the family Umbelliferae. 



The Common Wild Parsnip was shown to produce dermatitis 

 quite in the same manner as poison ivy and certain other plants. 



In discussing the peculiar effects of Ledum pah/sire. Dr. 

 Malte referred to the fact that the European form of this plant 

 was used during the pre-Christian era in Scandinavia in beer to 

 produce a certain effect. 



An interesting experience was cited by Mr. White in con- 

 nection with the common elderberry which had produced an 

 intense secretion of saliva. 



The Wonderberry, which is said to be a cross between 

 certain western forms of Solanum Nigrum was claimed by some 

 to have a poisonous effect, although the author of the above 

 book seemed to think otherwise. 



Seeds of Lychnis Githago were 1 elieved to be poisonous to 

 poultry, although in Scandinavia and Russia these seeds are 

 eaten by boys without any apparent effei 



Reference was made to an experiment at the Poultry 

 Department of the Ontario Agricultural College at Guelpb, Out.. 

 wl: reenirigs were fed to poultry with injurious effects. 



Refi rence was also made to an experiment in feeding 

 common mustard seed to animals for a long period of to 

 which resulted in the pro In >n of ulcei an I ! li er: wl 

 were believed identical with the blistei I >rmed by the 



u ard plasters. 



i Dr. Malte outlined the work 

 which had keen done I v Pr< '. Mao un, Mr. James M. Mi 



