BLASTOCLADIALES 687 



Saprophytic on twigs of Fraxinus sp., Sparrow (loc. cit.), Great 

 Britain; fruits, Das-Gupta and John (1953: 166, fig. 1), rotting turnip. 

 Lacy (1955:208), India. 



Founded on a fungus identified by Sparrow {loc. cit.) as Blastocladia 

 prolifera Minden. Because of the apically swollen basal cell and the 

 sterile setae Indoh considers it distinct from Minden's species. In view 

 of the variations found in both the shape of the basal cell and the 

 presence or absence of setae in the closely related B. pringsheimii, the 

 validity of the segregation on these bases may be open to question. 



Blastocladia globosa Kanouse 



Amer. J. Bot., 14: 298, pi. 32, figs. 1-4. 1927 

 (Fig. 46 E, p. 680) 



Basal cell globose or subglobose, the proximal cylindrical part very 

 short and 36-60 \x in diameter or absent, distally entire or with large 

 irregular expanded lobes or branches up to 200 \x in diameter by 120- 

 350 [j. high, wall thick (up to 10 \x), brittle, laminate, smooth or slightly 

 roughened, contents colorless or brownish, holdfasts stout, much branch- 

 ed, setae present or absent, whole thallus 120-400 \x long and up to 

 200 pi or more in diameter; sporangia cylindrical or broadly cylindrical, 

 55-160 [j. long by 15-60 \x in diameter, numerous, zoospores posteriorly 

 uniflagellate, spherical or somewhat elongate, 12-14 \i (long?) or 7-9 \x 

 long by 5-6 \x wide ; resting spores borne with the sporangia, subspherical, 

 ovoid or subpyriform, with rounded apex and truncate base, 25-70 <x 

 long by 27-50 [jl in diameter, wall thick, brownish, punctate, germination 

 not observed. 



Forming minute white pustules, particularly on hard fruits. Fruits of 

 crab apple, Crataegus, Kanouse (loc. cit.), apples, Cotner (1930a: 297, 

 figs. 5-10), Sparrow (1933c: 529), United States; apple, Sparrow (1936 

 a : 458), Great Britain ; fruits of Solanum pseudo-capsicum Crooks 

 (1937:228, text fig. 10C, pi. 10, fig. 2), Australia; fruits of Cornus 

 officinalis, Indoh (1940: 249, fig. 8), Japan; fruits, Das-Gupta and John 

 (1953: 167, fig. 3), India. 



If, as is possible, this is only a variety of Blastocladia pringsheimii, 

 growing on hard fruits, it is nonetheless a well-marked and readily 

 identifiable form. As Miss Kanouse points out, the species differs from 



