Fusaria of Potatoes 



169 



21. Fusarium anguioides n. sp. (Figs. It and 18; PL vi, fig. 11) 

 Conidia of diverse type, ranging from arthrosporial (short spindle- 

 shaped, with more or less rounded ends, 0- to 3-septate) to typically 

 slightly curved or nearly straight and anguiform, 1- to 15-septate; 1- 

 and 3-septate conidia typical for the first form and measuring 27 x 4.4 

 (20-38 x 3.9-5.3) n; for the other form the conidia commonly measuring 

 as follows: 



5-septate, 51 x 4.2 (47-68 x 3.9-4.6) n 



6- and 7-septate, 76 x 4.6 (65-86 x 4.2-5.2) M 



8- and 9-septate, 89 x 4.86 (80-102 x 4.3-5.8) ft 



Fig. 18. — Fusarium anguioides. a, Pseudopionnotal conidia from 6-days-old culture on 

 slightly acidified hard potato agar; b, conidia from 15-days-old culture on wheat grain; c, conidio- 

 phores from 6-days-old culture on slightly acidified hard potato agar; d, conidia from 46-days- 

 old culture on wheat grain; e, conidiophore from 15-days-old culture on wheat grain; f and g, 

 conidiophores, h, conidia, from 62-days-old culture on red raspberry cane plug; i, pseudopionnotal 

 conidia from 11-days-old culture on medium potato agar; j, conidiophores from 62-days-old culture 

 on red raspberry cane plug; k, pseudopionnotal conidia from 13-days-old hard lima-bean agar 



Color of conidia in pseudopionnotal layer, on glucose potato agar, ranging 

 from light pinkish cinnamon to cinnamon; arthrosporial conidia of com- 

 mon occurrence on aerial mycelium, but often the latter, especially on 

 different agar, nearly absent, when a thin spore layer, pseudopionnotes, 

 is produced for which anguiform conidia are typical. 



Hab. On rotted tuber of Solarium tuberosum from Castile, New York, 

 in association with F. arcuosporum. 



