464 AQUATIC PHYCOMYCETES 



resting spores terminal or intercalary mostly spherical, 13-14 u. in 

 diameter, with a single central [colorless] oil globule, about 8.2 u. in 

 diameter, wall smooth, about 1 \x thick" (Shen and Siang, loc. cit.). 



Saprophytic on decaying grass leaves from swamp, China. 



Distinguished from Cladochytrium tenue by the large zoospores. 



Cladochytrium replicatum Karling 



Amer. J. Bot., 18: 538, pis. 42-44. 1931 



(Fig. 6 A-J, p. 88) 



Cladochytrium nowakowskii Sparrow, Amer. J. Bot., 18: 619, pi. 45, figs. 



H-N. 1931. 

 Entophlyctis aitrantiaca Scherffel, in Domjan, Folia cryptogam., 2: 26, 

 pi. 1, figs. 50-51, 57-59, 72-73, 75. 1936. 



Sporangia generally terminal on short lateral branches, predomi- 

 nantly spherical, ovoid, or pyriform and free in the cell of the substratum, 

 or sometimes filling it and becoming irregular, symmetrical sporangia 

 8-18 u, in diameter, with a single narrowly cylindrical discharge tube of 

 variable length (occasionally several), wall thin, smooth, colorless, 

 proliferating ; rhizoidal system delicate, much branched, extensive, 

 bearing septate turbinate cells at frequent intervals; zoospores variable 

 in number, spherical, 4-7.3 u. in diameter, with a cadmium-orange or 

 golden-brown globule and a long flagellum, emerging through the tip 

 of the discharge tube and forming a temporary motionless group at the 

 orifice before swimming away, movement swimming or amoeboid; 

 resting spores borne like the sporangia on the thallus, predominantly 

 spherical, 9-21 \l in diameter, with a thickened spiny or smooth color- 

 less wall and a large cadmium-orange or golden-brown globule in the 

 contents, upon germination producing a discharge tube and functioning 

 as a zoosporangium or as a prosporangium. 



Saprophytic in a wide variety of vegetable materials and artificial 

 media, Karling (1931b; 1935; 1937b), parasitic in Spirogyra crassa, 

 Oedogonium spp., Coleochaete sp., cultivated on maize-meal agar, 

 Sparrow (loc. cit.), saprophytic in Elodea canadensis, decaying grass 

 culms, Sparrow (1933c: 524, pi. 49, fig.3), artificial media, Couch (1939a) 

 Karling (1941a: 387), in rotting oat leaves, Karling (1941b: 108), 

 Karling (1942c: 620), on onion skin and bleached grass leaves, Karling 



