176 



C. D. Sherbakoff 



clay color and buckthorn brown, and sporotrichic conidia are the com- 

 monest type. Whether the organism has changed only temporarily or 

 not is as yet unknown. 43 



Latin description. — Conidiis tribus typis: (1) conidiis ellipticis, apice 

 attenuatis, paulum pedicellatis, plerumque 5-septatis, 48 x 4.3 (45-55 x 



Fig. 20. — Fusarium arthrosporioides. a, Normal pseudopionnotal conidia, B, arthrosporial 

 conidia, from 1 4-day s-old culture on hard lima-bean agar; c, sporodochial conidia from 64- 

 days-old culture on hard lima-bean agar with 2 per cent glucose; v>, arthrosporial, e, normal, 

 conidia, f, conidiophores, from 11 -days-old culture on medium potato agar; g, atrial conidia, 

 H, conidiophores, from 11 -days-old culture on slightly acidified hard potato agar; i, conidia 

 and chlamydospores from 76-days-old culture on red raspberry cane plug; J. conidiophores from 

 11-days-old cxdture on medium potato agar; k, normal, l, arthrosporial, type of conidia, M, conidio- 

 phores, from aerial mycelium of 16-days-old culture on hard lima-bean agar with 2 per cent 

 glucose; n, sickle-shaped conidia, o, arthrosporial and sporotrichial conidia and conidiophore 

 of the sporodochial stage, from 36-days-old culture on rye grain; p, chlamydospores 



4-4.7) n; (2) conidiis arthrosporialibus, 0-3(5)-septatis, latis. fusifor- 

 mibus, 3-septatis circa 25x5.4 (19-33 x 4.7-6) n; (3) conidiis sporotri- 

 chialibus, plerumque 0-septatis, 4.5x3.8 (2.9-9 x 2.6-8) m- Typo primo 

 plerumque in pseudopionnotibus, typo altero in aerio mycelio, typo tertio 

 plerumque in parvis densis fruticosis conidiophoris uveosis, saepe similibus 

 sporodochiis; nullis veris chlamydosporis; aerio mycelio ex albo pallide 

 roseo " salmon color " (R), uniformi vel nodosas plus minusve magnas areas 



4J In this connection see last parai_Taph in description of F. biforme (page 168). 



