3q8 NATURAL HISTORY BULLETIN. 



31. Puccinia rhamni (Pers.) Wetlst. (1885. Verhl. 

 Zool.-Bot. Ges. Wien — ^545 ) • 



3irt. On Avena sativa L. Decorah, Iowa, Holway. 



2,ib. On Avena sativa L. Lafayette, Ind., Arthur. 



31c. On Avena fatua L. Decorah, Iowa, Holway. 



31J. On Rhamnus lanceolata Pursh. Lafayette, Ind., Arthur. 



31^. On Rhamnus alnifolta L. Her. Racine, Wis., Davis. 



Orig. Desc. "j&cidium rhamni. 2. Aethecis cylindricis roseis; semini- 

 bus aurantiis. Persoon." 



Second Desc. "3. P. coronata: Tab. 11. fig. 96. acervulis linearibus, 

 brevibus, minutis, obscure-fuscis, epidermide palescente cinctis; sporis 

 sessilibus, subclavatis, apice dentibus acutis stellato-radiatis flammeis 

 coronatis, infra luteis. Long. spor. 0,00175. p. p. Hab. in foliis Lu- 

 zulre albida; prope Reichenberg." — Corda, Iconesl:6. 



syn: 

 sEcidium rhamni Pers. (1791. Linne Syst. Nat. cura 

 Gmelin 2:1472.) 



Puccinia coronata Cda. (1837. Icones fung. 1:6.) 



I. ^Ecidia on somewhat thickened definite spots on lower 

 side of leaf, occasionally causing considerable distortions, espe- 

 cially when on young fruit and shoots, at first orange, becom- 

 ing nearly colorless with age; margin erect, somewhat erosed; 

 a^cidiospores orange-yellow, becoming pale yellow with age, 

 isodiametric or somewhat elongated, polygonal, 16-24// in 

 diameter; wall thin, minutely granulose. 



II. Sori of medium size, oblong to linear, amphigenous, 

 occasionally on sheaths and stems, scattered, rarely confluent, 

 but sometimes clustered, soon naked, orange color, ruptured 

 epidermis prominent; uredospores globose, with some admix- 

 ture of obovate-globose, 22-30// in diameter; wall colorless, 

 thin, obscurely echinulate; pores four or more, scattered; con- 

 tents orange when fresh, becoming yellow with desiccation. 



III. Sori amphigenous, but more abundant on under side 

 of blade, less common on sheaths and stems, scattered, irreg- 

 ularly oblong, partly punctiform, covered with the persistent 

 epidermis, grayish-black; teleutospores subclavate to linear- 

 oblong, 35-60 by 15-18//. brown, slightly or not constricted; 

 wall thin, smooth; apex not much thickened, but produced 



