STUDY 6. 
A WATER MOLD. Saprolegnia. 
A. Vegetative Stage. 
1. With forceps remove a few filaments from the source 
of the material and with l.p. and h.p. study the 
color, form, and structure. \ 
2. With what previously studied plant does it best 
compare ? 
3. Areany of the visible hyphe horizontal? If not, why? 
4, Apply a 5 per cent salt solution, observe the results 
and explain. ; 
B. Reproductive Stage. 
1. How do the distal ends of the various hyphe 
compare ? 
2. The more or less club-shaped distal enlargements 
(sporangia) produce numerous zoospores. 
3. Where are septa present? Why ? 
4. Make drawings and designate the parts. 
C. Life Problems. 
1. An organism which obtains nutriment from another 
living organism (host) is a parasite. A plant 
which obtains nutriment from dead organic 
matter is a saprophyte. What is the habit of this 
plant during its life history ? 
11 
