176 



THE LOWER FUNGI— PHYCOMYCETES 



are clavate to nearly cylindrical, arise at the apices of the segments 

 and appear single or in whorls. The zoospores are apparently 

 nionoplanetic, and usually escape directly through a terminal 



Fig. 66. — Sapromyces androgyriua Thaxter. (a) General habit of small 

 plant bearing sexual organs and swarmsporangia. {h) Swarmsporangia. (c) 

 Two Gogonia with oospores accompanied by antheridia on twisted branches. 

 (After Thaxter 189G.) 



pore. At times a tendency toward the formation of a thin-walled 

 vesicle, such as that in Rhipidium, is noted, but the membrane 

 ruptures early. The oogonium is typically pyriform, tapering to 

 a narrowed base, and is separated from the hyphal segment by a 



