FusARiA OF Potatoes 183 



organism could easily be identified when found, and thus must be recog- 

 nized as a good species. The organism was not isolated by the writer. 



VII. Section Sporoteichiella Wr. (Fig. 1q). WoUenweber, H. W., 

 Maine Agr. Exp. Sta., Bui. 219:256. 1913 



Fusaria of this section have from pyriform to nearly globular, mostly 

 0-septate, microconidia. Typical sickle-shaped, septate conidia always 

 present, at least in young artificial cultures. 



Only one species of this section is presented here. This species was 

 twice isolated from rotted potato tubers, and thus, at least in a way, may 

 be considered as of more or less common occurrence on this substratum. 

 There are many other Fusaria of this section reported on such substrata 

 as corn, carnations, apples, and others, a number of which are discussed 

 by Lewis (1913). None of the species of this section mentioned by him, 

 however, seem to be identical with the one here reported. 



Lewis (1913:257) reports that the following organisms were isolated 

 also from potatoes: (1) F. Poae (Peck) Wr., (2) F. Solani (Mart.) Ap. et 

 Wr., (3) F. conglutinans Wr., (4) F. Helianthi Sacc. var., (5) F. -pirinum 

 (Fries) Sacc, and (6) F. orthoceras Ap. et Wr. 



Numbers 2 and 6 are described in this paper ; numbers 1 and 4 are closely 

 related to F. sporotrichioides n. sp., and belong to section Sporotrichiella; 

 number 3 belongs to section Elegans and differs from F. orthoceras by 

 absence of red-wine color on rice (see WoUenweber, 1913 a: 30); number 

 5 may belong to section Arthrosporiella. 



No technical description, except results of inoculations — for potatoes 

 always negative — and certain characters of color and of colony growth, 

 is given, and thus a proper identification is rendered impracticable. 



26. Fusarium sporotrichioides n. sp. (Figs. 1q and 22; PI. iii, fig. 1) 

 Conidia scattered in aerial mycelium or 'n pseudopionnotes and distinct 

 sporodochia; of diverse tj^pe, ranging from unicellular, more or less pyri- 

 form, microconidia of sporotrichial form, to sickle-shaped, 3- to 10- 

 septate, apically pointed, pedicellate, macroconidia; 0-septate, sporo- 

 trichial conidia average 10.5x6 (9.5-11.4 x 5. 6-6.5) /z; sickle-shaped, 

 3-septate conidia average 30.4 x 3.8/x, and 5-septate average 50.5 x 4.3/^; 

 conidia of pseudopionnotes stage resemble those of F. anguioides; 

 chlamydospores often present, intercalary, commonly in small clusters; 



