Sumstine: North American Mucorales 



141 



This species has been frequently described by different authors, 

 as the above synonyms indicate. The name Syzygites was given 

 to the zygospore-bearing mycehum while the name Sporodinia 

 was applied to the part producing the sporangia. 



If the identity of Haller's plant were absolutely sure, his name 

 would have to be substituted for the name given above. 



This reddish-brown mould is easily recognized and very gen- 

 erally found on decaying Boleti and other fungi. 



Substrata : On decaying agarics, Boleti, Polypori. 



Specimens examined: Canada, Anderson 622; Maryland, 

 Fung. Colnmh. 1494; Massachusetts, Farlow 1487; New Jersey, 

 Ellis 22J()'; Pennsylvania, Sumstine; Virginia, Murrill. 



Illustrations: Bull. /. c. pL 480, f. j; Pers. /. c. pi. 6, f. 5; 

 Bref. /. c. pi. 6, f. 2^-25; Bainier, fitude, pi. 4, f. i-io. 



9. Circinella Van Tieghem & Le Monnier, Ann. Sci. 

 Nat. V. 17: 298. 1872 



Original description : Le filament fructifere est recourbe en 

 crosse au-dessous du sporange qui est ainsi reflechi vers le bas. 

 . . . En outre, le developpement de leur appareil fructifere aerien 

 est indetermine, et, comme les Rhizopus et Chaetocladium, elles 

 vegetent en guirlandes a la maniere des Lianes. 



Le sporange, ainsi reflechi le long du filament qui le porte, est 

 de forme spherique, et muni d'une grande columelle cylindro- 

 conique ; sa membrane est incrustee de granules d'oxalate de 

 chaux, non diflluente, et a la maturite elle se dechire circulaire- 

 ment vers son milieu, en laissant une large cupule hemispherique 

 autour de la base de la columelle pour laisser echapper un grand 

 nombre de petites spores spheriques. (In part.) 



Type species, Circinella umbellata Van Tieghem et Le Monnier. 



Sporangiophores growing singly from the mycelium, not termi- 

 nated by a sporangium, with lateral, fascicled or single, circinate 

 branches terminated by a sporangium with columella ; zygospores 

 borne on distinct sporangiferous filaments. 



I. Circinella umbellata Van Tieghem & Le Monnier, /. c. 300. 



1872 



Miicor iimhellatus Schroet. Krypt. Fl. Schles. 3 : 206. 1886. 



The clusters of sporangia on the principal sporangiophores 

 enable one to identify this species. 



