Sumstine: North American Mucorales 131 



Doubtful Sepcies 

 Mucor inaequalis Peck, Ann. Rep. N. Y. State Mus. 26 : 79. 

 1874. 



2. Absidia Van Tieghem, Ann. Sci. Nat. VL 4 : 350. 



1876 



Original description: En resume, les Absidia sent car- 

 acterises vis-a-vis de toutes les autres Mucorinees : 1° par le 

 developpement de leur appareil sporangial en arcades para- 

 boliques, issus Tune de I'autre en sympode et couronnees chacune 

 par un bouquet de sporanges piriformes; 2° par les rameaux ver- 

 ticilles, cuticularises et colores, qui viennent envelopper et proteger 

 la zygospore. 



Ces caracteres placent ce genre entre le Rhizopiis et le Phy- 

 comyces, mais plus pres du premier. (In part.) 

 Type species, Absidia capillata Van Tieghem. 



Sporangiophores in groups of 2-5, developed from the inter- 

 nodes of the stolons, terminated by a pear-shaped sporangium 

 with columella; zygospores produced on the stolons, enveloped 

 by circinate, cuticularized filamentous threads growing from the 

 suspensors. 



I. Absidia spinosa Lendner, Mucor. Suisse 

 132. 1908 



f Absidia cylindrospora Hagem, Unters. Norweg. Mucor. 45. 

 1908. 



Lendner gave a preliminary description of this species in Bull, 

 de I'Herb. Boissier II, 7: No. 3. 1907. The spine growing from 

 the extremity of the columella suggested the name spinosa. 



Substrata : Grown in the laboratory on sterilized bread. 



Specimens examined: Pennsylvania, Sumstine (laboratory 

 culture). 



Illustration : Lendner, /. c. f. 46. 



3. Phycomyces Kunze, Myk. Hefte 2: 113. 1823 

 Original description : Flocci decumbentes, continui, simplices, 



flaccidi. Sporidia oblonga circa vesiculam pyriformem apice 



insidentem collecta. 



Type species, Ulva nitens Agardh, Syn. Alg. Scand. 46. 1817. 



