39° BOTANICAL GAZETTE [junk 



vary in length from 12 to 32 /a; Shear and W^ood (40) place the 



While 



purp 



seen 30 to 1,2 fi long; but here aU the asci were not eight-spored, some 



0^ 



Here, 



as in other forms where this condition exists, the spores in the few- 

 sporcd asci are larger than in the eight-spored ones. The length of 

 the neck of the perithccium is also quite variable, and as a rule it is 

 generally longer than those previously described on apples. Miss 

 Stoneman (43) shows some of them to be very long, and Shear was 

 rarely able to find any so long. An examination of her slides, how- 

 ever, which are still in the Cornell University laboratory, leaves no 

 doubt that the perithccia were as she illustrated them. Furthermore, 

 perithecia with necks Just as long (fig. 17; have been seen manv times. 

 In the forms from rubber plant, Dracaena, Coffea, and Sarracenia, 

 which produced their perithecia on leaves, the long necks were the 

 rule rather than the exception. However, these same forms in pure 

 culture, with the exception of the form from Sarracenia which did 

 not produce perithecia in pure culture, formed perithecia with short 

 necks. The length of the neck seems to be dependent to some extent 

 upon the substratum. However, the depth to which the perithecia 

 are imbedded in the substratum does not seem to be the controUing 

 factor. The perithecia may be nearly or entirely superficial, or may 

 be nearly or entirely imbedded in the substratum; many of those 



which 



Just 



a 



(fig 



tcct stage is unknown. I obtained this stage from the different 



as follows: (i) By placing portions -of the diseased host in a 



^^ w^ f^ ^^^-^^ L. _ 1 1 ■ . _ 



forms 



moist 



If the pen- 



thecia did not develop in this time, it was useless to continue the 

 experiment. The following forms produced perithecia in this manner : 

 apple, orchid, Sarracenia purpurea, Coffea arahica, Anthurium waroc- 

 qneanum, and Aschpias syriaca. (2) From inoculations on plates 



^iKW J^\ ^'^''°' '^ ^""^^^ ^'^^^'^''^ ^^^^^ ^^^ ^ost (apple, Dracaena, 



.. --^ and Coffea arahica). (3} On bean plugs (cotton). 



rubber 

 (4) 



On plates of bean agar from a culture that had been kept alive in 

 the laboratory for over a year (quince). 



