246 BOTANICAL GAZETTE [October 



a protruding oval or obovate body (fig. 976) which is the primor- 

 dium of the pycnidium-hke body which later forms. This primor- 

 diiun arises by either simple (fig. 97a) or compound meristogenous 

 (fig. 100) development. It soon becomes globose and membranous, 

 with a cellular outer wall, but remains light of color, so that a few 

 dark spores may be seen within (figs. 98, 99). At this stage the 

 structure is to all appearances a young pycnidium (fig. loi). 

 Within a few days the top breaks, the few spores already formed 

 are extruded, sometimes rather forcibly (fig. 102), and the cavity 

 then becomes saucer- shaped. Conidiophores arise in profusion, 

 and many spores are produced. When the first spores are noted 

 the body is a pycnidium, if observed in a later stage it appears 

 like an acervulus. In Pestalozzia capiomanli similar facts were 

 noted by Bainier and Sartory (4), while Leininger (24) in his 

 studies of P. palmarum speaks of these bodies as pseudo- 

 pycnidia. 



Pestalozzia guepini Desm.; isolated from the fruit of a kumquat 

 {Fortunella margarita Swingle) from Lake City, Florida, January 

 1916. 



A few pycnidia were produced in plate culture. In the begin- 

 ning stages a number of branches of closely lying or nearby hyphae 

 branch, snarl, and intertwine (figs. 103, 104). Cells within the 

 more closely twined part of the mass swell and divide by continued 

 cross and longitudinal divisions until a rounded mass is formed, 

 which is the primordium of the pycnidium (fig. 105). This primor- 

 dium arises symphogenously. The development of the final 

 sporing body from this stage is very similar to that described for 

 Pestalozzia palmarum. 



Pestalozzia, species indet.; isolated, by the author November 

 19 1 6, from leaves of peony (Paeonia officinalis Retz) procured by 

 Dr. H. A. Anderson near Crawfordsville, Indiana. 



A good growth of mycelium and numerous sporing bodies 

 were produced in plate cultures. The mycelial threads are slightly 

 larger than those of other species of Pestalozzia studied. Pycnidial 

 primordia arise usually by the compound meristogenous method 

 (figs. 107, 108). As these bodies develop from the pycnidial stage 

 to the open type, the formation of spores within (fig. 109), a 



