CONTRIBUTIONS TO THE BOTANY OF MICHIGAN 



BY C. K. DODGE 

 INTRODUCTION 



A considerable amount of data on the plants of the state has accumulated 

 since the appearance of the last edition of W. J. Beal's Flora of Michigan.^ 

 Some of this data has been published but a large part is in the form of 

 herbarium specimens, notes, and manuscripts. In his work on the phan- 

 erogamic flora of the state, carried on during the past ten years for the 

 Michigan Geological and Biological Survey and the Museum of Zoology, 

 the writer has been able to add a number of species to the known flora and 

 to obtain much additional information on the ranges of many of the species. 

 Some of this data has been published in local lists, but a large number of 

 miscellaneous notes have not been appurtenant to the local lists and there 

 has been in Michigan no suitable medium of publication for them. It is now 

 purposed to publish such notes in the Miscellaneous Publications of the Mu- 

 seum of Zoology, under the general title Contributions to the Botany of 

 Michigan, and to number these consecutively for ease in reference. 



The present paper records a number of species new to the Michigan 

 flora and extends the range of several forms. Unless otherwise stated speci- 

 mens are in the writer's herbarium at Port Huron, Michigan. 



Pellaea glabella Mett. 

 Smooth Cliff-brake 



The smooth cliff-brake is perhaps very close to P. atropurpnrca (L.) 

 Link. It is not recognized in the last edition of Gray,- and it is given as a 

 synonym of P. atropurpnrca in Britton and Brown. It is not referred to in 

 the last Michigan Flora. In 1905, while examining peat beds in the Upper 

 Peninsula, the late Prof. C. A. Davis made a large collection from dry rocks 

 near Norway, Dickinson County, of a fern that was then supposed to be 

 P. atropurpnrca but which has since been referred to P. glabella. 



^ 5th Ann. Rept. Mich. Acad. vSci., 3904. 



"The manuals referred to in this paper are Gray, New Manual of Botany, 7th 

 edition, igo8 ; Britton and Brown, An Illustrated Flora of the Northern U. S., Canada 

 and the British Possessions, 2nd Ed., IQ13 ; and W. ]. Beal, Alichigan Flora, Fifth 

 Annual Report Mich. Acad. Sci., IC04. 



