OKDER MONOBLEPHARIDALES 



87 



velops in little tufts, usually covered by bacterial slime, on the surface 

 of the fruits. The mycelium is variously branched, arising from a tuft of 

 branching, tapering rhizoids. The external mycelium is constricted at 



Fig. 26. Monoblepharidales, Family 

 Monoblepharidaceae. Gonapodya siliquae- 

 formis (Reinsch) Thaxt. (A) Portion of 

 fungus showing typical habit. (B) Unopened 

 zoosporangium with zoospores outlined. (C) 

 Zoosporangium with escaping zoospores. 

 (D) Zoospore. (After Thaxter: Botan. Gaz., 

 20(ll):477-485, Univ. Chicago Press.) 



frequent intervals producing cylindrical or moniliform coenocytic seg- 

 ments. At the constrictions there are usually plugs of a carbohydrate 

 substance that has been called cellulin. At the ends of the branches the 

 terminal segment becomes the zoosporangium, ovate or lanceolate in 



