The Canadian Horticulturist. 337 



oftimes bloom the next. We have it to bloom as often as three times in a 

 summer. And such blooms ! They are much like the flower of the Cereus 

 grandiflorus ; it is also a night bloomer, and often called by mistake the " night- 

 blooming " Cereus. It is one of the best plants for beginners, being of as easy 

 culture as a geranium, and there is no reason why one should not succeed 



with It. 



In Meehan's Monthly for August we read : — A great difference has to be 

 made between " the night blooming Cereus " and the night blooming Cactus, as 

 it is often called. The night blooming Cereus is Cereus grandiflorus, while the 

 night blooming Cactus is Phyllocactus latifrons. The former has rope-like stems, 

 covered with lines of small spines, — the latter has flat, frond-like stems. The 

 latter is an interesting flower, but not nearly as interesting or rare as the former. 

 We learn from a list published by Mrs. Theodosia B. Shepherd, of California, 

 that the common name of the leafy form, or Phyllocactus, is " Queen Cactus, ' 

 and if the botanical names are considered too difficult, and a common name 

 desired, it would be much better to distinguish the two by adopting the Cali- 

 fornia name. 



Swedish Box Thorn. 



751. Sir,— Can you tell me through the columns of the Canadian HoRTlctrLTUBisT 

 where the Swe<lish Box Thorn can be obtained in Canada or Britain ? 



Chas. p. Morgan, Tmro, N.S. 



(Reply by Prof. Craig, of the Central Experimental Farm, Ottawa ) 



Write to our Canadian nurseryman ; also Wm. Fell & Son, Hexham, Nor- 

 thumberland, England. 



Destroy ing- Ants. 



752. Sir, — Can you give me any directions how ants may be quickly destroyed 

 where they infest a lawn and caiise the grass to have a withered appearance. If you know 

 of any effectual remedy, I would be glad to learn what it is. 



E. A. Arkaud, Annapolis, y.S. 



(Reply by Prof. Craig.) 



Mr. Ellwanger, of Ellwanger & Barry, says, *' Perforate the hills and pour 

 in a solution of crude carbolic acid, composed of one pound of acid to two quarts 

 of water ; a gill of the liquid will suffice for an ant hill." Tobacco insecticide 

 soap is also efficacious. It is, moreover, excellent, when sufficiently diluted, for 

 destroying ants where they have formed their hills in or about plants. 



