SECT. II. REPRODUCTIVE ORGANS. 



gous to those of the Mosses ; but the parts corre- 

 sponding to the stamens and pistils of perfect plants 

 do not appear to have been hitherto ascertained so 

 satisfactorily as to leave no ground of doubt. In 

 their flowering however they appear also, like the 

 Mosses, to be either monoecious or dioecious, and 

 perhaps even without exception, so that I believe no 

 example of an hermaphrodite flower has yet been 

 suspected among them. 



SUBSECTION I. 



Barren Flowers. According to Hedwig the Descrip- 

 barren flowers of the Hepaticae, which can scarcely 

 be said to have any perceptible calyx or corolla, con- 

 sist either of small and globular protuberances issuing 

 from the summit of the plant, or from among the 

 leaflets, or from the surface of the frond, constitut- 

 ing a viscus that contains a powdery substance which 

 is the pollen, as in Jungermannia ; or of small and 

 minute granules surrounded with substances re- 

 sembling the succulent threads of the Mosses, and 

 imbedded in the body of the frond ; or in target- 

 shaped substances issuing from the surface of the 

 frond, and elevated in conspicuous pedicles, as in 

 Marchantia. 



SUBSECTION II. 



'Fertile Flowers. The fertile flowers consist for Their 

 the most part of a double envelope, an outer and p ' 



