582 AQUATIC PHYCOMYCETES 



Nowakowskiella elegans (Nowak.) Schroeter 



Engler and Prantl, Natiirlichen Pflanzenfam., 1 (1): 82.1892 (1893) 



(Fig. 35 A-G, p. 583) 



Cladochytrium elegans Nowakowski, pro parte, in Cohn, Beitr. Biol. Pflanzen, 



2:95, pi. 6, figs. 14-17. 1876. 

 Nowakowskiella endogena Constantineanu, Revue Gen. Bot., 13: 387, fig. 83. 

 1901. 



Sporangium terminal, occasionally intercalary, when free being spher- 

 ical, ovoid, pyriform, or oblong, when endobiotic often assuming the 

 shape of the confining cell, 16-40 \x or more in width, apophysate or 

 nonapophysate, with or without a discharge tube, wall thin, smooth, 

 colorless, proliferating, operculum smooth or umbonate; rhizoidal 

 system highly variable in nature and extent, strongly polycentric, with 

 irregular expansions, up to 10 \x or more in width, tips delicate, septate 

 turbinate cells occasionally formed; zoospores spherical, 5.0-7.5 ji. in 

 diameter, with a large colorless globule and a long flagellum, escaping 

 upon the dehiscence of the operculum, 5-7 \i in diameter, and forming 

 a temporary motionless compact mass at the orifice, imbedded in or 

 surrounded by mucilaginous material, movement swimming or amoe- 

 boid; resting spores, where known, with a smooth, thick wall, com- 

 pletely filling their container. 



Saprophytic in the gelatinous sheath of Chaetophora, Nowakowski 

 (loc. cit.), Germany, decaying leaves of Alisma plantago-aquatica, Con- 

 stantineanu (loc. cit.), Rumania; boiled grass culms, Matthews (1928: 

 229, pi. 34), cultivated on seeds and corn stem, Sparrow (1933a: 70, 

 fig. 2), grass leaves, Couch (1939a), Karling (1941a: 387; 1942c: 620), 

 rotting oat leaves, Karling (1941b: 108), on cellophane, from moist soil, 

 Karling (1948c: 510), decaying maize stem, Sparrow (1952d: 768), 

 United States; in leaves of Elodea and in grass, Sparrow (1936a: 453, 

 pi. 17, fig. 17), Great Britain; soil, Karling (1944b: 388), Brazil; 

 Shanor (1944: 331), Mexico; cellophane bait and vegetable debris, 

 Sparrow (1952b: 69), Cuba; soil, Remy (1948: 214), Reinboldt (1951 : 

 178), Germany; corn leaves, Shen and Siang (1948: 185), China; from 

 soil, substrate?, Gaertner (1954b: 22), Egypt, Equatorial East Afri- 

 ca, South Africa. 



Constantineanu's fungus is said to differ from Nowakowskiella elegans 



