THE FUNGI WHICH CAUSE PLANT DISEASE 463 



Phallus Linnseus (p. 462) 



Stipe cylindric, even, bearing at the apex a 

 smooth, rugose, or reticulate pileus. 



Less than ten species are known. The follow- 

 ing are of economic importance. 



P. impudicus L. 



This is one of the most widely distributed 

 species of the genus, but not so common in 

 America as in Europe. It is reported "" as the 

 cause of a root disease of the grape in Himgary. 



P. rubicundus Bosc. 



Cobb ^^^ has described a disease of sugar cane 

 as due to Ithyphallus coralloides. Lloyd,"^ 

 however, refers the causal fungus to the present Fio- 332.— Phallus 



, . , ji , 11 ji 1 impudicuB. Alter 



species, smce he considers that all the red Lloyd, 

 forms of "Phallus" constitute a single species. 



Dictyophora Desvaux (p. 462) 



A species of this genus is suspected by Cobb ^^' as one of the 

 causal fungi in a root disease of sugar cane in Hawaii. 



Clathraceae (p. 462) 



The receptacle consists of a series of arms which are either 

 spreading, erect, or latticed. 



Key to Geneba of Clathraces 



Receptacle of free arms, or lobes at the sum- 

 mit of the stipe 



Stipe columnar, arms free 1. Lysurus. 



Stipe enlarged upwards 



limb of the receptacle with subereet 



lobes 2. AnthttTUS. 



Limb of the receptacle with radiating 



lobes 3. Aseroe. 



Eeceptacle of simple, erect, columns, apical- 

 ly united and fertile only on their inner 

 side 



Sessile 4. Latemea, p. 464. 



Stalked 5. Pseudocolus. 



