354 BOTANICAL GAZETTE [october 



marked by irregular successive constrictions; the sporangiola 

 typically three-spored, rarely four or six-spored, broadly elliptical, 

 falling from the small nearly spherical vesicle which bears them, or, 

 if not fully matured, carrying the latter with them. Spores from 

 all types of sporangia purplish to reddish brown, marked by sub- 

 labyrinthine longitudinal ridges and furrows, oval or long-elliptical, 

 those from the sporangiola at first somewhat three-sided from pres- 

 sure, bearing a group of straight fine radiating appendages from 

 either pole. Spores very variable; those of the larger sporangia 



8-10X4 ju; from smaller sporangia 10-13 X 5-8 M> ^ rom sporangiola. 



average 12X5 m- Larger sporangia 40-50^; smaller to 16 /x; 

 sporangiola, average 1 1-1 2 X 13-14 /x; the vesicle 3-3 . 5 ju. Chlam- 

 ydospores very variable, average 1 7-24X8-1 8 /i. 



This interesting type, which has been named in honor of Professor A. F. 

 Blakeslee in recognition of his brilliant researches on the Mucorales, appeared 

 as an impurity in a transfer of Botrytis Rileyi which was kindly sent me several 

 years ago, together with specimens of the affected larvae, by Professor Faw- 

 cett. The larvae attacked by the Botrytis were found on cowpeas at Gaines- 

 ville, Florida, and it seems probable that the spores of the present fungus, 

 which may have been growing on the faded flowers of this plant, were 

 accidentally transferred to the diseased insect. 



m 



appear to lose its power of spore production, like species of Choane- 



■ • 



ph 



When first culti- 



vated, the fatty protoplasm of the hyphae was usually bright 

 orange yellow, so that the mycelium as a whole was strikingly 

 colored; but after continuous culture for several years on potato 

 agar, this characteristic has disappeared, or the mycelium retains 

 only a slightly yellowish tint. The mycelium grows very rapidly, 

 and in two or three days the sporangiola begin to be produced in 

 abundance, each fertile hypha bearing from one to a dozen spo- 

 rangioliferous heads, which under a hand lens resemble exactly in 

 color and appearance the ordinary "conidial" fructifications of 

 Choane phor a. Instead, however, of producing a primary head from 

 the surface of which the conidial heads arise, as in the last men- 

 tioned genus, the fertile hypha branches repeatedly in an irregularly 

 dichotomous fashion, the outline of the branches and branchlets 



