PUCCINIA. 341 



p. saniculae Grev. On Sanicaht euwpaca. (liiitain iind 

 U.S. America.) 



P. soldanellae (D.C.). (]}ritain.) On various species of 

 SoldaneUa. This disease is often very common in tlie mountains, 

 and is conspicuous because it attacks only leaves here and there 

 on a plant. The leaves are yellowish with petioles distinctly 

 elongateil ; their laminae, which bear aecidia on the lower side, 

 are smaller and somewhat cup-shaped. Diseased plants do not 

 seem to bloom. 



P. menthae (Pers.). (Britain and U.S. America.) This is 

 a most destructive rust to all kinds of cultivated mint.' It 

 attacks species of many genera of Labiatae. 



P. calthae Link and P. Zopfii Wint. On Caltha polustria 

 in Eumpe and North America. 



P. epilobii-tetrag-oni (D.C.) {P. 2^ulccrulrnta Grev.). On 

 Epilvljinin. (l)iitain and U.S. America.) 



P. Peckiana Howe [P. inter stitialis (Schlecht.)]. This species 

 occurs un several species of Ruhus in America, and causes con- 

 siderable damage in blackberry culture.^ 



P. gentianae (Strauss). On (jentiaii. (Britain and U.S. America.) 



P. galii (Pers.). On Galium and Asperula (Woodruff). The teleutitspores 

 liiliernateon the dead stem.s. (Britain and U.S. America.) 



P. convolvuli (Per.'^.). On Convolvulus. (Britain and U.S. Ameiica.) 



P. primulae (D. ( '.). On species of Priinidn. (Britain.) 



P. obtusa Scliroet. On Salvia verticillata. 



P. thesii (])esv.). On Theuum. (Britain and U.S. America.) 



P. albescens (Ore v.). On Adoxa Moschatellina. (PJritain.) 



P. aristolochiae (D. C). On A ristolochia. 



P. asparagi (I). ( '.). (ISritain and U.S. America.) A.sparaj^iis-rii.st. Tlie 

 teleiitospoi-es liiliernate in dry remains of the jilants, wliich should therefore 

 l)e l)urnt in autumn. 



P. porri (Sow.) ()iii«n-rust. On linth wild an.l cultivated Allium. 

 Sometimes very destructive to chives [A. .■ichoenuprasuni). (Britain.) 



(b) Hetereupuccinia. Urcdosporcs and teleuto^ores dcvdupcd 

 on a Iwfit other than that of the p^jenidiri and aecidia. 



Puccinia graminis Pers. (Britain and U.S. America). P>lack- 

 rust or summer-rust.^ Uredospores and teleutospores occur on 

 various species of Gramineae, the pycnidia and aecidia on 

 species of Perbci'is or Mahonia. 



' Clinton in Report of Agricultural Station of University of Illinois, 1893. 

 -A valuable monograph on the rusts of cereals has been published by 

 Eriksson and Henning (Die Getreideroste, Stockholm, 1896). 



