176 



C. D. Sherbakoff 



cla}' 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.^ 



Latin description. — Conidiis tribus ty^is: (1) conidiis ellipticis, apice 

 attenuatis, paulmn pedicellatis, plermnque 5-septatis, 48 x 4.3 (45-55 x 



Fig. 20. — Fu^arium arfhrosporioides. a, Normal pseudopionnotal conidia, B, arthrosporial 

 conidia, from H-days-old culture on hard lima-bean agar; c, sporodochial conidia from 64- 

 days-old culture on hard liyna-bean agar with 2 per cent glucose; d, arthrosporial, E, normal, 

 conidia, f, conidiophores, from 11-days-old culture on medium potato agar; g, aerial 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 cayie plug; j. conidiophores from 

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

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

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

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



4-4.7)^1; (2) conidiis arthrosporialibus, 0-3(5)-septatis, latis fusifor- 

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

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

 plerumque in pseudopionnotibus, t3T30 altero in aerio myceho, typo tertio 

 plerumque in parvis densis fruticosis conidiophoris uveosis, saepe simihbus 

 sporodochiis; nuUis veris chlamydosporis; aerio mj^ceho ex albo paUide 

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



^ In this connection see last paracTaph in description of F. hiforme (page 16S). 



