PUCCINIA. 341 



p. saniculae Grev. On Sanicula europaea. (Britain and 

 U.S. America.) 



P. soldanellae (D.C.). (Britain.) On various species of 

 Soldanella. This disease is often very common in the mountains, 

 and is conspicuous because it attacks only leaves here and there 

 on a plant. The leaves are yellowish with petioles distinctly 

 elongated ; 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 

 i> 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 palustris 

 in Europe and North America. 



P. epilobii-tetragoni (D.C.) (P. pulverulenta Grev.). On 

 JSpilobium. (Britain and U.S. America.) 



P. Peckiana Howe [P. intcrstitialis (Schlecht.)]. This species 

 occurs on several species of Bubus in America, and causes con- 

 siderable damage in blackberry culture.^ 



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



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

 hibernate on the dead stems. (Britain and U.S. Anieiica.) 



P. convolvuli (Pers.). On Convolvulus. (Britain and U.S. America.) 



P. primulae (D. C). On species of Primula. (Britain.) 



P. obtusa Schroet. On Salvia verticillaia. 



P. thesii (Desv.). On Thesium. (Britain and U.S. America.) 



P. albescens (Grev.). On Adoxa Moschatellina. (Britain.) 



P. aristolochiae (D. C). On Aristolochia. 



P. asparagi (D. C). (Britain and U.S. America.) Asparagus-rust. The 

 teleutospores hibernate in dry remains of the plants, which should therefore 

 be burnt in autumn. 



P. porri (Sow.) Onion-rust. On both wild and cultivated Allium. 

 Sometimes very destructive to chives {A. schoenoprasum). (Britain.) 



(b) Hetereupicccinia. Uredospores and teleutospores developed 

 on a host other than that of the pycnidia and aecidia. 



Puccinia graminis Pers. (Britain and U.S. America). Black- 

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

 various species of Gramineae, the pycnidia and aecidia on 

 species of Berberis or Mahonia. 



' Clinton in Report of Agricultnral Station of Urdversity of Illinoii, 1893. 

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

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



