PHYSARELLA 99 



colorless, with many or few lime-knots, sometimes almost badhamioid, 

 at other times limeless and in this respect approaching Didymium. 



Rather artificially separated from Physarum, mainly on the basis of 

 the broad, saucer-shaped sporangium, mounted on a stalk. Unlike 

 Physarella in shape and lacking the characteristic trabecule of that 

 genus. 



A single species: 



Trichamphora pezizoidea Jungh. 



Fl. Crypt. Jav. 12. 1838. 

 PI. VII, Figs. 141, 142. 



1854. Didymium zeylanicum Berk., Hook. Jour. Bot. 6 : 230. 



1869. Physarum macrocarpum Fuckel, Symb. Myc. 343. 



1873. Trichamphora fuckeliana Rost., in Fuckel, Symb. Myc, Nachtr. 71, 



1875. Chondrioderma pezizoides Rost., Mon. 424, pi. 8, fig. 122. 



1876. Badhamia fuckeliana Rost., Mon. App. 2. 



1876. Chondrioderma zeylanicum (Berk.) Rost., Mon. App. 15. 



1876. Chondrioderma muelleri Rost., Mon. App. 15. 



1876. Chondrioderma berkeleyanum Rost., Mon. App. 16. 



1888. Didymium australe Massee, Grev. 17 : 7. 



1892. Didymium pezizoideum (Jungh.) Massee, Mon. 239. 



1899. Didymium parasiticum Sacc. & Syd., Syll. Fung. 14 : 836. 



1903. Physarum pezizoideum (Jungh.) Pav. & Lag., Bull. Soc. Myc. Fr. 19 : 7. 



Sporangia discoidal or saucer-shaped, gregarious, stipitate, erect 

 or nodding, grayish white, peridium thin, breaking irregularly, per- 

 sistent; stipe subulate, striate, reddish brown, transparent; capillitium 

 variable as above stated; spores pale violet-brown, spinulose or nearly 

 smooth, about 9 /jl. 



In Mycetozoa ed. 3. 71, the spores are described as 9-17 /x in di- 

 ameter. This would seem to suggest incomplete development in the 

 sporangia with the larger spores. 



Puerto Rico, British and Dutch Guiana, Bolivia; Europe, Africa, 

 Malay Peninsula, Australia, Japan; abundant in the old-world tropics, 

 apparently rare in the western hemisphere. 



7. Physarella Peck 

 Bull. Torrey Bot. CI. 9 : 61. 1882. 



Sporangia cylindrical, deeply umbilicate, the upper part of the 

 peridium inverted so as to form a thimble-shaped or bell-shaped struc- 

 ture; capillitium composed of slender filaments with minute fusiform 

 nodes, together with stout spine-like processes, extending from the 

 exterior to the interior walls of the sporangium and firmly attached to 

 the former. 



