252 Grlomerella cinofulata and its Conidial Fonns 



•ft> 



aparaphysate ; von Schrenk and Spaulding^ who later changed this 

 name to Glomerella also describe it as aparaphysate; to Edgerton^ it 

 seems best to regard this genus as such ; but Sheldon^ has seen paraphyses 

 in a number of forms and Shear has found the asci of G. rufomaculans 

 var. vaccina Shear to be accompanied by what seem to be evanescent 

 paraphyses. In the perithecia of chilli Glomerella are found at times 

 sterile bodies (Fig. 5 a) of varying length and breadth but never longer 

 or broader than the normal asci. They are not completely filled with 

 protoplasm. It has, as a rule, contracted from the walls and become 

 collected in the centre of these bodies. They can not be regarded as 

 paraphyses because they seem to be asci which have become abortive 

 at various stages of their development. 



Miss Stoneman^ considers the perithecial form of Glceosporium 

 piperatum E. and E. to closely resemble Gnomoniopsis {Glomerella) 

 cingulata but makes a new species of the former as she finds a specific 

 difference in its more slender perithecia and smaller spore measurements. 

 At the same time she admits that these characters vary in dift'erent 

 cultures and that the larger measurements of the perithecial stage of 

 G. piperatum are common to smaller perithecia and spores of the privet 

 anthracnose. 



Miss Stoneman also lays importance to the difference in growth on 

 nutrient media of the colonies from ascospores and conidia of the chilli 

 and privet anthracnoses. From the later investigations of Edgerton^ 

 and Shear and Wood^ it seems clear that much reliance should not be 

 put on cultural characters for the determination of Glomerella species 

 as they have found the perfect stage to be extremely variable. 



That cultural characteristics and spore measurements are not a safe 

 criterion in determining specific differences is also evident from the 

 present study of the Glomerella on chilli. As already stated the peri- 

 thecia and asci (Figs. 5 and 6) vary a great deal in size and shape ; in many 

 cultures the measurements of the asci and ascospores reached the limits 

 given by Miss Stoneman for G. cingulata. It seems therefore that there 



' Schrenk, H. von and Spaulding, P. The Bitter-Rot of the Apple. U.S. Dept. of Agr., 

 Bur. of PI. Ind., Bull, No. 44, p. 29, 1903. 



- Edgerton, (J. W. The Physiology and Development of some Anthracnoses. Bot. Gaz., 

 XLV, p. .389, 1908. 



3 Sheldon, J. L. The Ripe Rot or Mummy Disease of Guavas. West Virginia Agr. Expt. 

 Sla. Bull., No. 104, p. :U2, 190G. 



« Stoneman, B. lor. til., p. 106. ^ Edgerton, C. VV. loc. cit., pp. 393-39G. 



• Shear, C. L. and Wood, A. K. Studies of Fungous Parasites belonging to the Genus 

 Glomerella. U.S. Dept. of Agr., Bur. of PI. Ind., Bull, No. 252. pp. G5 and 98, 1913. 



