POLLEY : OBSERVATIONS ON PHYSALACIUA INFI.ATA. .'527 



P. stillboidea (Cke.) Sacc. (7) was described by Cooke (6) 

 (under Pistillina stillboidea Cooke) from New Zealand material 

 on Panax leaves. It is also very small, about 3 mm. in height, 

 with hollow, globose, depressed club. Cooke (6) also states 

 that Pistillina paradoxa B. & C. (Cr inula -paradooca B. & C.) 

 must also be referred to the same genus as Pistillina stilboidea 

 Cooke. Among others he cites as exsiccatae Thumen Myc. 

 Univ. No. 208, and Ellis N. A. Fungi No. 23 on living leaves 

 of £>uercus. These two specimens have been examined and 

 prove to be Cronartium asclepiadeum quercinium B. & C. 

 They agree with Ellis and Everhardt N. A. Fungi No. 1881, 

 second series. 



The genus Physalacria as at present known therefore, com- 

 prises four species, two North American, one South American, 

 and one Australian. 



Figure on Plate XLIX. 

 Figure 16 Photograph of plant, natural size. 



Description of Plate LIII. 



Figures 2 and 3 are magnified 5.5 all the remaining figures an 

 magnified 455 times. 



Figure 1. Detail of section vertical to surface of club. 



Figure 2. Diagram of vertical median section through whole plant; 

 a, hymenium ; <$, closely packed hyphae ; c, interior gelatinous portion ; 

 d, layer of flask-shaped cells; e, interior portion shown in fig. 7; f, 

 hollow central portion of old stem. 



Figure 3. Same as fig. 2 except that it is taken at right angles to 

 flat surface. Lettering same as fig. 2. 



Figui-e 4. Small portion of hymenium showing basidia with spores 

 and also sterile cells between. 



Figure 5. Clamp connections of loose inner hyphae. Stages in 

 formation. 



Figure 6. Detail of flask-shaped cells on surface of stipe. 



Figure 7. Cross section of inner portion of stipe, a, intercellular 

 space; £, large cells; c, smaller cells. 



Figure 8. Cystidial ceil of hymenium. 



Figure 9. Peculiar hyphal septations ; a, anastomosing of two ap- 

 proaching hyphal ends. 



Figure 10. Cross section of outer portion stipe; a, flask-shaped 

 cells; b, hvphas beneath the surface. 



Figure 11. Longitudinal section of portion shown in fig. 10. 



Figure 12. Detail of large cells in stipe. 



