PAPERS GIVING RUSTS OF NORTH AMERICA. 223 



Kellenn. {P. Muhlenbergicc Arth. & Holw.), on Muhlenbergia and 

 other grasses, as repeatedly proven by cultures. Schweinitz changed 

 the name to JEcidhtm (Ccroiiia) hibisciatiim on page 309 of the 

 same work. 



*2878. 68. C. A. Hepaticatum, L.v.S., scarcely C. quadrifidum, Lk. n. 152. 

 Here and there on degenerate leaves, i. e., not trilobate, but nearly 

 reniform and multilobed, of Anemone hepatica, Bethlehem. 

 C. spots entirely wanting; the leaf, nevertheless, on which it rests 

 degenerates. Pseudoperidia very large, broad, the margin ex- 

 actly cleft into four parts, revolute, the lobes broad, brown. 

 Spores fuscous-brown. Occupying the whole leaf. 



Represented only by an empty packet labelled "/Ecidium He- 

 paticatum Bethlehem, 24." 



It is probable that the failure to recognize this rust as the 

 Aicidium quadrifidum DC, found on Anemone in Europe, was 

 largely due to the peculiar distortion of the leaf produced by the 

 fungus in the case of Hepatica. The form on both Hepatica and 

 Anemone is the secial stage of the plum rust, Trancschclia punctata 

 (Pers.) Arth. (PucciniaPruni-spinosa: Pers.), and is on the common 

 liverleaf of the eastern states, Hepatica Hepatica (L.) Karst. (H. 

 triloba Chaix., Anemone Hepatica L.). The combination Aicidium 

 (Cctowm) hepaticatum is made by Schweinitz on page 309 of the 

 same work. 



2879. 69. C. A. Geraniatum, Lk. 156, on leaves of Geranium maculatum and 



G. carolinianum. Exactly identical with the European. Syn. 



Car. 443. 

 (443. 14. [^-Ecidium] Geranii maculati Sz. 



A. diffuse, hypophyllous, thickened, red, peridia dense, broad, 

 smooth on the margin, spores yellow. 



Frequent and large on leaves of Geranium maculatum. On the 

 upper surface of the leaves it makes a diffuse spot. Peridia densely 

 aggregated. Spores simple, globose, cellular under the microscope, 

 yellow-fuscous ; some are united in pairs as if compound, and very 

 rarely are furnished with a pedicel.) 



Represented by the central part of a leaf, 2 by 3 cm., mounted, 

 showing one large group of secia, and by an empty packet labelled 

 inside "^cidium Geranii maculat Salem," and on the outside 

 "^cidium Geraniatum LvS G. maculat Salem." 



