No. XV.B.] APPENDIX. 237 



PLANTS PARTIALLY DESTROYED BY THE VASTATOR. 



Wild Plants. Cultivated Plants. 



Plants before enumerated. Plants before enumerated. 



Belladonna. Potato.* 



Stramonium. Tomato. 



Hyoscyamus. Sweet potato. 



Plantain. Jerusalem artichoke. 



Heartsease. Garden artichoke (?). 



Mallow. Wheat. 



Chickweed. Indian corn. 



Thistles. Cabbages, swedes. 



Docks. Horse-radish. 



Elder. Celery. 



Parsley. 



Strawberry (Walker). 



Major convolvulus. 



Marigolds. 



Balsams. 



Tulips. 



Crocuses. 



Cinerarias. 



Verbenas. 



Many Solani. 



Peach and nectarine. 



Numerous other greenhouse plants. 



This list of itself is sufficiently formidable, but we must also fear the 

 aphis of the hop, the cabbage, the pea, the bean, the corn aphis, the grass 

 aphides, the black collier, and the aphis of the apple-trees. It is upon the 

 recurrence of aphides, especially of the vastator, upon which future food 

 or famine depends. We only know that aphides are continually increasing, 

 and, if we do not destroy them, they will infallibly destroy us. All aphides 

 are alike in sucking the juices of the plant and causing it to die locally 

 at the puncture, or generally throughout the system. All live upon the 

 vital fluid, and all induce the fatal gangrene, which the potato has 

 abundantly shown. 



The past month has been unfavourable" to animated beings. Alternate 

 freezings and thawings have been sufficient to destroy almost everything 

 which has life, and even the deaths amongst men have been much above 

 the average. Notwithstanding this inclemency, there are plenty of the 

 vastators alive upon the plants out of doors. I found it upon the turnip, 

 shepherd's-purse, docks, and mallows, and I have no doubt, had not 

 business and the bad weather prevented me, I should have found it in 

 abundance upon many plants. It is not yet living upon the wheat, nor 

 can I find any other species upon this plant. In greenhouses it exists 

 in profusion on young potato plants, cinerarias, verbenas, crocuses, and 



* The potato plant is very rarely utterly destroyed. Generally speaking, 

 there is some portion of a whole plant, some round eye, remaining amongst all 

 the tubers, to continue the growth of the plant. 



