Mycological Bulletin 



No. 55 



n'. A. KcIIcniiaii, Ph. D., Ohio State University 



Columbus, Ohio, April 1, 1906. 



Acknowledgement. — We are indebted to Mr. Carl Krebs of Cleve- 

 land for the photograph of specimen shown in Fig. 171, which represents 

 one of the Stink-horn fungi or Phalloids. It differs from Dictyophora 

 and Phallus (which we illustrated on pages 71 and S3) in the pileus being 

 wholly adnate to the summit of the stipe, the gleba occupying its outer 

 surface. The stipe is hollow within. 



White Ru.st. — This name is given to a group of parasitic fungi which 

 are not real Rusts at all. They belong to a distinct group called the Phy- 

 co-my-ce'-tes or Algal-fungi. We hardly need go into the botanical de- 

 tails which would weary a beginner — but suffice it to say that the family 

 to which the fungus shown on page 220 belongs is that to which the Grape 

 Mildew belongs, namely, Pcr-o-nos-po-ra'-ce-ae. We have selected this 

 particular one, growing on the wild Potato-vine (Iponioca pandurata) be- 

 cause it produces conspicuous distortions of the host; see a in Fig. 173. 

 An interesting thing is this that the parasite produces two kinds of spores — 

 summer spores and xi'infer spores. The former are shown in the figure 

 at r and one of the latter embedded in the tissue of the leaf, at h. The 

 summer spores are white or nearly so, and a waxy white covering is to be 

 seen just before they break through the epidermis for dissemination. The 

 winter spores lie dormant till spring. 



LIBRARY 



NEW YORK 



BOTANICAL 



OaKDEN. 



I'lG. 171. — .Mb'-Ti'-Nus c.\ .M'-NL'.-i. < >iu- I'f tliL' l^h.iUc iii Is iT .^tiiiklicin tuiii,'!. 

 See the first paragraph above. Photograph by Carl Krebs, Cleveland, Ohio. 



^I Uuiversitv Bulletin, Series 9. No. 43. Entered as Second Class Matter. Post-office at Cglumbus. Ohio 



