ANTHOCEROS. 



BRYOPHYTES; HEPATIC^; ANTHOCEROTALES. 



PRELIMINARY. 



THIS liverwort is not so common as are the two already 

 studied, but may be found frequently on wet ground 

 or stones in deeply shaded places or even in dense growth 

 of grass. Its thallus is usually smaller than that of 

 Riccia, and often appears as a small scale-like green 

 body, adhering very closely to its support. The plant 

 is easily identified when sporophytes are present, since 

 they are prominent dark green slender columns which 

 stand upright from the flat thallus. Material for study 

 should consist of the thallus, both in vegetative and 

 reproductive periods, and of those bearing sporophytes. 1 



LABORATORY WORK. 

 GROSS STRUCTURE. 



With some specimens in a small dish of water observe: 



1. The size of the thallus as compared with Riccia and Mar- 

 chantia. 



2. The form. 



3. Thickness, at the margins and along the midrib. 



1 Owing to the peculiar importance of Anthoceros in illustrating the 

 development of the plant kingdom, suitable material should be obtained 

 from a supply house in case the local region does not furnish it. 



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