XIII. A REVISION OF THE ^lUCOEACEAE WITH 

 ESPECIAL REFERENCE TO SPECIES RE- 

 PORTED FR03I NORTH AMERICA. 



RoscoE Pound. 



General considerations. The greater part of the systematic 

 portion of this article was written for the forthcoming Part T of 

 the Flora of Nebraska, but on account of limited space, only a 

 few of the descriptions and a small part of the synopsis will find 

 a place in that work. The number of excellent revisions of this 

 groups which have appeared recently make any further attempt 

 of doubtful utility. But as none of them are in the English 

 language, and as the forms described from North America by 

 the older authors have not been subjected to the examination 

 they still sadly need, this survey of the group may not be out 

 of place. 



The Mucoraceae are quite a coherent and well marked group. 

 There is no great difficulty in tracing the relationship of the 

 several genera, and the groups into which it is subdivided set 

 themselves off quite readily. Nor is it unwieldly in point of 

 numbers. In the Sylloge Fungonon 29 genera are given and 199 

 species. Nine of these genera, however, must be totally 

 rejected. They are genera described by Corda, Preuss, Berke- 

 ley, and other early mycologists, partly from insect eggs, partly 

 from slime moulds, and partly, perhaps, from Hyphomycetes. 

 Fischer recognizes 20 genera, rejecting Tieghemella of Berlese 

 and DeToni in the Sylloge, but adding Dicranophora Schroeter, 

 since described. Schroeter has united with some freedom, and 

 recognizes but 15 genera, including one not in Fischer's range. 

 One more has recently been described, so that to follow 

 Schroeter we should have 16, and to follow Fischer 22 genera. 

 I think we may well follow Schroeter in all but two cases, and 

 my conclusion is that* there are 18 valid genera, if we accept 

 Dewevre's Carnoya, which is not yet sufficiently described. 



1. A. Fischer ia Krypt. Flor. v. Deutschl. etc.; the (unflnislied) sketcli by 

 Schroeter in Engler ii. Pruntl. PUanzenfamilien; A. Dewevre. Cotitr. a T Etude des 

 Mucorlni'es (unfinished), Grevillea, S. 1803, and Mr. 1894. 



