342 BULI.ETIN 73- 



cialis. On the aflfected parts the mycelium penetrates to some 

 depth, however, in the tissue and warty swellings appear, or a 

 large part of the surface is laid under contribution to the fungus. 

 Two of these hypertrophied fruits showing the extremes of this 

 condition are reproduced in fig. 7, Plate III. 



On the specimens which were collected July 28, the surface of 

 these warty projections was roughened and finely cracked, and 

 beside the mature asci which were present there were other fungi 

 of a saprophytic nature, especially a specimen of Cladosporium, 

 though not in profusion. The hymenium was upon the surface of 

 this tissue. The asci are about 25-30 long by 8-1 1 in diameter, 

 and some of them presented a constriction near the base. The 

 stalk cell in the specimens seen were very short, but farther study 

 is necessary to determine these characters. The asci, however, 

 are near the type of those on the leaves. Whether the myce- 

 lium is perennial in the branches and grows out into the fruits, 

 or whether infection takes place by spores from the species on the 

 leaves cannot at this time be stated. If the former were the case 

 there would seem good ground for considering it as a distinct 

 species. 



Prunus Triflora Roxburgh. Japan Plum. 



Exoascus rhizipes n. sp. 



This very interesting species was collected by the writer on 

 Japan plums of the variety sometimes called Botan, or Botankio. 

 It was collected at Auburn, Ala., May i, 1892. Superficially the 

 hypertrophied fruit and buds resemble those on the Chickasaw 

 plum (/*. angustifolla). One specimen, in which an affected fruit 

 and bud were growing very close together on the same branch, 

 was photographed and is reproduced in fig. 4, Plate II. 



While the superficial resemblance is close to the hypertrophies 

 caused by E. mirabilis Atkinson, the structure of the fungus is 

 very different, and also differs markedly from any described spe- 

 cies. It is more closely related to E. Io?ig-?pes Atkinson, but differs 

 from that in the stalk cells which intrude much farther between 

 the cells of the epidermis and by the frequent development of 

 numerous rhizoids which are intermingled with the stalk cells and 

 also penetrate between the epidermal cells. The lower part of 



