COLEOCH^ETE. 



THALLOPHYTES; ALG-EJ CHLOROPHYCE.E. 



PRELIMINARY. 



THIS plant grows in standing water, and is seen as 

 small green disks on sticks, stones, etc., in quiet water. 

 The plants are quite small and are not easily recognized. 1 

 When material is found it may be brought into the 

 laboratory on its supporting substance, and may be 

 preserved thus. Since the form is rather rare, permanent 

 mounts should be made when good material is found. 



LABORATORY WORK. 



GROSS STRUCTURE. 



1. The size and general distribution of plants upon the sub- 

 stratum. 



2. Color. 



3. Form. Are any branches at margin of disk discernible? 



1 In many localities Coleochate is not abundant, but because of its 

 great importance in the chain of forms which illustrate the evolution 

 of plants it is introduced, and fresh or preserved specimens should be 

 obtained. If material cannot be had, the form should be carefully 

 studied from text and manual. 



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