pucciNiA. 355 



P microsora Korn. On Caresc vesicaria. 



P. caricicola Fuck. On Carex supina. 



P. aUii (D. C). Onion-rust. (U.S. America.) 



P. iridis (D. G). On Iris. (Britain.) 



P. veratri Niessl. On Veratrum album and V. viride. (U.S. America.) 



Puccinia pruni Pers. Plum or Prune Rust. [This is a 

 common species in both Europe and the United States ; it 

 attacks almost every kind of cultivated drupaceous fruit, includ- 

 ing prune, plum, peach, nectarine, apricot, cherry, and almond. 

 The uredospores are brown, the teleutospores darker, and both 

 are as a rule found only on the under surface of the leaf 

 (Fig. 82). The leaves first show yellowish or reddish spots 

 which rapidly enlarge and darken in colour till rupture of the 

 epidermis takes place, and they rapidly dry up. The fruit is 

 thus altogether lost or much injured, while ripening of the wood 

 is more or less interfered with. 



The remedies suggested are : sprayings with modified eau 

 celeste, or ammoniacal copper carbonate (see p. 69)].^ (Edit.) 



P. cerasi (Bereng.) Cherry-rust on Prumts Cerasus, P. Amygdalus, 

 and P. Persica. 



P. oenotherae Vize. On American species of Oenothera. 



P. giliae. Hark. On Phlo.v and Gilia. (U.S. America.) 



P. tanaceti D. C. On Tanacetum vulgare. (Britain and U.S. America.) 



P. sonchi Eob. et Desm. On Sonchus. (Britain.) 



P. endiviae Pass. On Cichoria Endivia in Italy. 



P. carthami Corda. On Carthamus tinctoria. 



P. balsamitae (Strauss). On Tanacetum Balsamita. 



P. picridis Haszl. On Picris in Hungary. 



P. bistortae (Strauss) (Britain and U.S. America). On Polygonum 

 Bistorta and P. vivipartim. The teleutospores have no papilla on their 

 germ-pores. Soppitt (Grevillea, 1894) claims relationship between this 

 species and an Aecidium on Conopodium. denudatum (Aec. huniiQ)). 



P. mammillata Schroet. (U.S. America). On Polygonum Bistorta. The 

 upper cell of the teleutospore has an apical thickening. 



P acetosae (Schum.). On Rumex Acetosa, R. arifolia, and R. Acetosella. 

 Ludwig says it hibernates in the uredo-form. 



P. polygoni Pers. (Britain and U.S. America). On Polygoneae. 



P. rumicis-scutati (D. C). On Polygoneae. 



P. ozyriae Fuck. (Britain and U.S. America). On Oxyria. 



P. castag^ei Thiim. On Apium graveolens in France. 



P. cicutae Lasch. On Oicuta virosa. 



'Pierce {Journal of Mycology, vii., p. 354) gives an account of this disease as 

 found in California, and describes application and results of various remedies. 



