386 BOTANICAL GAZETTE [june 



Quite often, however, when a conidlum germinates in w^ater, there 

 may be formed at the end of the spore or at the end of a short germ 

 tube a small hyahne conidium perfectly normal except as to size. 

 This was observed by Atkinson (3) from the form on cotton, and 

 by Halsted (22) from a form on Podophyllum pdtatum, but it does 

 not seem to be peculiar to these forms, for it is rather common in all 

 members of this type. 



Under proper conditions some forms, either on artiftcial media or 

 on the original host, develop the perfect stage abundantly. During 

 the past few years this stage has been found from a number of differ- 

 ent hosts: from privet, orchid, pepper, red raspberry, and vanilla (?) 

 by Miss Stonem-^n (43); from Dracaena (38, 39) and guava (37) 

 by Sheldon; from apple by Clinton (10); from grape, cranberry, 

 Ginkgo, cotton, rubber plant, honey locust, and bean by Shear and 

 Wood (40J; from Artocarpus by Delacroix (13); from Cattleya 

 by :Maublanc and Lasnier (27), described as a Physalospora. 

 Several other forms described as Physalospora, Laestadia, and Phoma- 

 tospora undoubtedly should be placed here. During the past two 

 years I have worked with the ascigeral stage from the following hosts : 

 apples from ^Missouri and IlHnois; Dracaena from West Virginia; 

 rubber plant from West Virginia; cotton from Georgia; Coelogyne 

 cnstata, Sarracenia purpurea, Cojjea arabka, and AtUllurium waroc- 

 queanum from the Cornell University conservatory; quince from an 

 orchard in Ithaca, N. Y.; and Asckpias syriaca from Ithaca. The 

 last named has been known in the conidial stage as Gloeosporium , 

 fusarioides E. & K. This is the first time that the perfect stage has 

 been reported from the last five hosts. The peiithecia, asci, and 

 spores are very much dike from the diffeient hosts. The foUowing 

 description, based on the perfect stage as it appears on the apple, 

 would fit in nearly aU cases the other forms as weU. 



On apples from the south-central states affected with the bitter 

 rot, the perfect stage seems to develop readily. Apples were received 

 from Illinois and Missouri, and in both cases perithecia were found 

 on the surface accompanymg the acervuH. There seems to be con- 



«4.^ -J 11 Am 



fe 



manner 



peritheci 



