176 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



logical conditions are closely bound up with the evolution of 

 Allodus and Bullaria. 



Host relationships 

 A tabular presentation of the host orders and families of Allodus 

 is given below. 



Class Order Family No, Species 



Monocotyledoneae; Graminales Gramineae i 



Liliales Alliaceae i 



Liliaceae 5 



Dicotyledoneae Chenopodiales Portulacaceae i 



Ranales Ranunculaceae 3 



Berberidaceae i 



Papaverales Cruciferae i 



Hypericales Violaceae I 



Myrtales Onagraceae i 



Umbellales Ammiaceae 8 



Primulales Primulaceae I 



Gentianales Gentianaceae i 



Polemoniales Coavolvulaceae 6 



Polemoniaceae 2 



Labiatae 2 



Solanaceae i 



Scrophulariaceae 2 



Rubiales Rubiaccae 2 



Valerianales Valerianaceae I 



Campanulales Ambrosiaceae i 



Compositae 5 



Total number species 47 



The most interesting point in connection with the host rela- 

 tionships is the absence of the order Resales. 



Life history 

 The genus Allodus was founded on Puccinia Podophylli Schw., 

 a common rust in the United States east of the Mississippi River. 

 This species according to Olive^ possesses perennial mycelia of 

 both gametophytic and sporophytic generations which inter- 

 mingle more or less constantly throughout the young host. Later, 

 independent sporophytic mycelia arising evidently from aecio- 

 spore infection, give rise to telia of the scattered type. 



^ Olive, E. \V. The intermingling of perennial siwrophytic and gametophytic 

 generations in Fiiccinia Podophylli, P. ohtegcns and Uromyces Clycyrrhizae. Ann. Myc 

 11: 297-311. 1913. 



