I 



140 Journal of Mycology [Vol. 13 



be in one of its conidial stages, but where does its perithecial 

 stage belong? Species of Gloeosporium, and their near km, the 

 CoUetotrichiims, are so common that it does seem as if some one 

 must have found the perithecial stage of a few of them and de- 

 scribed them as species of long-established genera. This might 

 have been done without a knowledge of the acervial stage. There 

 are a few records of species of Laestadia, Physalospora, and the 

 comparatively new genus GlomercUa with known conidial stages 

 of species of Gloeosporium and CoUctoirichum; there is also a 

 considerable number of hosts which have species of Gloeospo- 

 rium and Collctotrichum (one or both) and species of Laestadia 

 and Physalospora (one or both) occurring upon them, but 

 whether any relationship exists between these acervial and 

 perithecial stages is probablv unknown. 



This fungus, which causes the leaf-tip blight of Dracaem 

 fragrans, is verv similar to species of Laestadia, Physalospora, 

 and Glomerella having both acervial and perithecial stages, espe- 

 cially P. Vanillae A. Zimmerm., P. Cattleyac Maubl. & Lasnier, 

 and 'the apparentlv composite species Glomerella rufomaculans 

 (Berk.) Sp. & v. Schr. If the presence of paraphyses is taken 

 into consideration, it cannot be a species of Laestadia, since this 

 genus is not paraphysate; neither can it be a species of Glom- 

 erella, as this genus was originally described,' for the perithecia 

 in the leaves and many of the cultures are simple instead of 

 "caespitose or more or less compound and immersed in a stroma" 

 and paraphysate instead of "aparaphysate." Since it corresponds 

 more nearly to the genus Physalospora than to either Laestadia 

 or Glomerella, it is placed in this genus for the present and the 

 name Physalospora Dracaenae n. sp. proposed. 



West Virginia Experiment Station, 



Morgantown, W. Va., June lo, 1907. 



'Schrenk. Hermann von and Spaulding, Perley. The bitter-rot of 

 apples. Bui. U. S. Dept. Agr. Bu. PI. Ind. 44:29. 1903. 



