132 



Mycologia 



Sporangiophores erect, simple, terminated by a large sporang- 

 ium, growing singly from the mycelium ; zygospores borne on the 

 mycelium, suspensors with dichotomously branched outgrowths, 

 copulating branches tong-shaped. 



I. Phycomyces nitens (Agardh) Kunze, /. c. 1823 

 Ulva nitens Agardh, I. c. 181 7. 



Periconia phycomyces Bonord. Hbdk. Allg. Myk. 113. 1851. 

 Mucor romanus Carnoy, Bull. Soc. Royal Bot. Belg. 9: 157. 

 1870. 



Mucor violaceus Bref. Bot. Unters. 4: 56, 92. 1881. 



The large, metallic-like sporangiophores enable one to identify 

 this species even without lens or microscope. It prefers oily or 

 greasy substances and can easily be grown on ground flax seed. 

 It has been reported as growing on a mushroom, Collybia dryo- 

 phila (Bull.) Fr. (Peck, Ann. Rep. N. Y. State Mus. 31. 1909). 



Substrata : On ground flax seed, cornmeal, horse manure. 



Specimens examined: North Carolina, Wood; New York, 

 Mrs. N. L. Britton; Oregon, Lake; Pennsylvania, Sumstine, 

 Schweinitz. 



Illustrations: Carnoy, /. c. pi. i, f. 1-4, pi. 2, f. j-j, pi. 5, 

 /. J-/; Van Tieghem, Ann. Sci. Nat. V. 17 : pi. 20; Bainier, 

 fitude, pi. I, f. 12-15. 



4. Hydrophora Tode, Fung. Meckl. 2: 5. 1791 



Mucor (Mich.) L. (Many authors since 1850.) 



Original description : Fungus globosus, stipitatus, capitulo 

 aqueo ; stipite capillari subrecto ; f ructificatione ignota. 



Type species, Hydrophora stercorea Tode. 



Sporangiophores simple, arising singly from the mycelium, 

 terminated by a sporangium with columella ; zygospores borne on 

 the mycelium, naked, copulating branches straight. The species 

 under Section i. Mono-Mucor, of Fischer (Rabenh. Krypt. Fl. i*: 

 184. 1892), belong to this genus. 



Under this genus, Tode placed three species, H. minima,'^ 

 tenella,^ stercorea. The descriptions of the first and second are 



* Fischer (Rabenh. Krypt. Fl. i* : 297) thinks this is a Syncephalis, probably 

 5". nodosa. 



t See under Pilaira for further discussion. 



