CHAPTER XV. 



DISEASES OF THE ROSE. 



Brave Rose, alas, whose art thou 1 In thy chair 

 Where thou didst lately so triumph and shine, 

 A worm doth sit, whose many feet and hair 



Are the more foul the more thou art divine. 

 This, this hath done it; this did bite the root 



And bottom of the leaves, which, when the wind 

 Did once perceive, it blew them under foot. 



Where rude, unhallow'd steps do crush and grind 

 Their beauteous glories. Only shreds of thee. 

 And those all bitten, in thy chair I see. 



Herbert. 



HE diseases to wiiich the Rose is liable are 

 iv\ generally owing either to the presence of 

 various Cryptogamee, or to the attacks of 

 certain insects whose larvee are supported at 

 the expense of the plant. The Cryptogamae 

 which have been observed upon rose-bushes, 

 and which infest chiefly the Provins and 

 other rouffh-leaved roses, are the following : 



Sporotricum pulchellum. — Duhuy. Greenish filaments under the 

 leaves, and scarcely visible. 



OiDiuM LEUcoNiUM. — Descemct. Whitish filaments growing on the 

 leaves and diseased trunks. 



Uredo pinguis. — Decandolle. Small orange-colored, linear plates 

 growing upon the fibres of the petioles of the leaves, and upon the 

 diseased heps or fruit. 



Uredo Ros.e. — Persoon. Numerous small groups of a pale-yellow 

 color, and found upon the leaves. 



