PESTS OF THE FLOWER GARDEN. 



33 



is at first pale brown, then dark brown, covered with the pale cuticle, 

 which splits irregularly, leaving the ragged margins like a frill round the 

 pustules. 



The teleutospores are fusoid or clavate, rounded at the apex, or conical, 

 with the epispore thickened, divided at the middle into two cells, the 

 lower one attenuated downwards into the hyaline pedicel (30-50 x 10-20 /j), 

 pale in colour, and ochrey brown. 



No cluster-cups, or uredo, known to be associated with this species, 

 which is reported over the greater part of Europe, Asiatic Siberia, and 

 North America. 



In some books it is called Puccinia Arenarice, and in others Puccinia 

 lychnidearum. There are authors to whom names are pretty playthings, 

 to be tossed about as they please. 



Doubtless infection is transmitted of this disease through imported 

 seeds. 



Sacc. Syll. vii. 2361; Mass. PL Dis. 253; Cooke Hdbk. No. 1503; 

 Cooke, M. F. p. 210 ; Ploivr. Br. Ur. p. 210 ; Garcl. Chron. Jan. 12, 1884, 

 p. 57 ; Jan. 26, 1884, p. 120 ; Journ. B.H.S. p. 652, PI. I., f. 5. 



Campion Brand. 

 Puccinia Silenes (Schrot.), PI. II., fig. 36. 



We are not prepared to affirm to what extent this pest has worked in 

 gardens, but it is common on wild plants, and we fear sometimes on 

 cultivated ones also. It occurs on the living leaves of almost any species 

 of Silene and Melandryum throughout Europe. 



The first stage, or cluster-cup (JEcidium behenis), appears in the spring 

 on the Bladder Campion, in small rounded clusters of the usual appear- 

 ance, with white fringed margins and orange spores. The aecidiospores 

 are angular and granulated (17-26 x 14-20 fx). 



The pustules of the uredo form come later, and are rather small, 

 either scattered, or at times confluent, and the uredospores are elliptical 

 or ovoid, externally rough (19-26 x 17-22 fj), pale brown. 



The teleutospores are contained in darker pustules, of a similar form 

 and scattered, but not collected upon bleached spots. They are elliptical, 

 or ovate, quite different in general outline from those of the Sweet 

 William brand, rounded at both ends, arid divided in the middle into two 

 ^equal cells (25-40 x 16-25 yu), externally smooth, and of a chestnut- 

 brown colour, with a short and uncoloured pedicel. 



The area of distribution includes France, Belgium, Germany, Switzer- 

 land, Italy, and Siberia, as well as Britain. 



Dilute Bordeaux mixture has been recommended as having proved 

 •effective. 



Sacc. Syll. vii. 2154 ; Journ. B.H.S. 1902, p. 652, PI. 2, f. 15 ; Cooke 

 M. F. p. 211 ; Ploior. Br. Ur. 147. 



Puccinia fastidiosa on Dianthus sinensis has larger teleutospores, and 

 seems to be peculiar to Siberia (Journ. B.H.S. 1902, PL II., f. 16). 



D 



