A new Species of Globulina 



By H. Hasselbring 



Among the parasitic fungi collected at Ithaca during the sum- 

 mer of 1898, an interesting plant bearing a remarkable resem- 

 blance to the members of the genus Erysiphe was found on leaves 

 of Antennaria plantaginifolia. The resemblance, however, is re- 



■ 



stricted to the habit and superficial appearance of the plant. 

 Microscopic examination at once shows it to belong to a widely 



different group. 



The perithecia are brown and membranaceous, and possess a 

 distinct ostiolum. This at once excludes the plant from the Peri- 

 sporiales. The color of the perithecia might at first lead us to 

 place the plant in the Sphaeriales, but other, less artificial char- 

 acters point to the Hypocreales as the proper systematic place for 

 the plant in question. As has been said the perithecia are thin 

 and membranaceous, not carbonaceous as in the Sphaeriales. The 

 spores are very slender and filiform, and easily break into shorter 

 portions at the septa. This condition is rare among the Sphaeri- 

 a/es, but preeminently characteristic of certain groups of the Hy- 

 pocreales. On account of these characters together with the 

 superficial Erysiplie-like habitat of the plant its proper position 

 seems to be in the genus Globulina Speg., although it differs in 

 certain characters which will be mentioned below. 



Up to the present time two species of Globulina are known. 

 The first, G. erysiphoides, Speg. was described on leaves of Com- 

 positae from Brazil. Spegazzini indicates the peculiar habit of the 

 plant by the specific name which he gave it. G. Ingae Pat. oc- 

 curs on leaves of Inga pachycarpa, a leguminous plant from 

 Ecuador. The genus Globulina, based upon the first species, is 

 described as lacking the ostiolum, but Lindau questions this fact. 

 The perithecia are colored, and paraphyses are said not to be 

 present. 



In view of these facts the present species is peculiarly interest- 

 ing. It is the first northern species of the genus, and like the 

 Brazilian plant occurs on the leaves of a composite. It has the 



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