MUCORALES 



269 



sometimes only one. In the second species, //. decipiens Thaxter, 

 one-spored sporangiola only have been observed. In the latter 



Fig. 97.- — Dissophora decumhens Thaxter. (a) Terminal portion of fertile 

 hypha showing origin of sporangiophores behind the elongating apex. (6) 

 Portion of fertile hypha bearing mature sporangiophores. (c) Mature sporan- 

 gium. {After Thaxter 1914.) 



Fig. 98.- — (o, b) Haploaporanyium decipiens Thaxter, showing monosporic 

 sporangiola. (c-e) H. bisporale Thaxter with bisporic sporangiola. {After 

 Thaxter 1914.) 



case the wall of the sporangiolum is roughened while that of the 

 enclosed spore is smooth. 



