992 RECORD OF CURRENT RESEARCHES RELATING TO 



lu these points the RicciesB agree with the Marchantiaceaj. The 

 following relate to the variety in the development of the branches or 

 portions of the thallus which bear the sexual organs. 



3. The sexual organs of some species are associated in more or 

 less sharply defined groups (inflorescences). 



4. On their formation the growth of the apex is modified in 

 various ways. 



The following are described by the author as the different types of 

 develoi)ment of the male and female inflorescences of the Marchan- 

 tiacece. 



1. The sexual organs are scattered over the surface of the thallus; 

 apical growth does not appear to be modified by their production. 

 To this tyi^e belong the true Riccieas $ and 9 ; also Clevea (Sauteria) 

 $ ; apjjarently also BoscMa ^ . 



2. The sexual organs are congregated in groups (inflorescences) 

 recurring on the same axis ; where receptacles occur, these are there- 

 fore purely dorsal stnactures : — Corsinia ^ and 9 j Pkigiochasma, 

 Fimhriaria, Hehoulia, Grimaldia, Sauteria (Peltolepis) $ ; with 

 formation of true female receptacles : — Plagiochasma, Clevea 9 . 



3. The inflorescences are also dorsal structures, but are placed at 

 the apex of an unbranched shoot : — Duvcdlia, Lunularia ^ ; Targionia, 

 Cyathodium $ and 9 j with formation of a true female receptacle, 

 from the enclosing of the apex of the axis : — Duvcdlia, Heboulia, 

 Fimhriaria, Grimaldia. 



4. The inflorescences correspoud to an entire branch-system : 

 Lunularia 9 ; Fegatella ^ ; Marcliantia and Preissia ^ and 9 • 



The following is the course of develoi^ment of the sexual organs in 

 the Marchantiacese : — At first distributed over the surface of the 

 thallus, they subsequently arise in groups, and become combined into 

 inflorescences, which, having at first a dorsal position, are constantly 

 pushed further back towards the apex of the axis, and enclose it in 

 their growth, and thus dorsal inflorescences are converted into terminal. 

 In those genera which dichotomize freely, the formation of the in- 

 florescence commences at the moment of branching ; and thus the 

 entire branch-system aids in the formation of compound inflorescences. 



In conclusion, the author states that the same course of develop- 

 ment of the inflorescences may also be traced in the Jungermanniaccfe ; 

 and that it is highly probable that the same is true also of the Musci, 

 notwithstanding apparent deviations. 



New Hepaticae.* — The following new and critical species of 

 Hepaticfe are described by Limj^richt : — Alicularia Brcidleri, Sarco- 

 scyphus confertus, S. commutatus, and Jungermannia decolorans. 



Fungi. 



Observations on Uredinese and Ustilaginese.t — G. Winter con- 

 tributes the following observations to our knowledge of the life- 

 history of some fungi belonging to these two families. 



* 'JB. Schef. Ges. f. vuteil. Cultm-,' Iviii. See ' Bot. Ceutralbl.,' i. (ISSO) 

 p. 806. 



- 1 'Hedwiyia,' xis. (18S0) p. 105. 



