• Rosendahl and Butters: reputed Minnesota plants 465 



Woodsia glabella R. Br. 



Reported in Upham's Catalogue; report seems to be based on some 



incomplete specimens, which are certainly not this fern, and are 



probably Cystopteris fragilis (L) Bernh. 

 Woodsia scopulina D. C. Eaton. 



Previous reports of this species should be referred to IV. Cath- 



cartiana Robinson, and to an incorrectly determined specimen of 



W. oregana D. C. Eaton. 

 Dicksonia punctilobula (Michx.) Gray. 



Does not occur ; report based on incorrect determinations. 



Botrychium lanccolatum (Gmel.) Angstrom. 



Suspected by Upham to occur in northeastern Minnesota; no speci- 

 mens. 



Salvinia natans (L.) All. 



The reports of the occurrence of this species in Minnesota are based 

 on its spontaneous appearance at the University Greenhouse in a tub 

 of water in which had been placed a quantity of aquatic plants, 

 muck, etc., collected in Sweeney Twin Lakes in the vicinit}' of Alin- 

 neapolis. From this origin it has flourished in the greenhouses of 

 the University for more than thirty years. It has never been found 

 growing in the open in Minnesota, though a careful search has been 

 made in the Sweeney Twin Lakes and elsewhere. At the time when 

 it appeared a number of aquatic plants from outside of the state 

 were being handled in the greenhouse, and we are constrained to 

 think that this plant was introduced along with some of them. 



Equisctum liiorale Kiihlewein. 



Reported in Gray's Manual; no specimens. 

 Equisetum hiemale L. var. robustum (A. Br.) A. A. Eaton. 



Reported in Holzinger's list of Sandberg's Minnesota Plants ; no 



specimens. 



Lycopodium sclago L. 



Reported in Upham's Catalogue from the north shore of Lake Su- 

 perior ; no specimens. 



Lycopodium sitchense Rupr. 



Reported in Gray's Manual from the north shore of Lake Superior; 

 no specimens. 



Lycopodium sabinacfoliuiii Willd. 



Reported in Upham's Catalogue as frequent northward ; probably 

 confused with forms of L. complanatum L. as there are no Minne- 

 sota specimens of L. sabinaefolium. 



Selaginella apus (L.) Spring. 



In Upham's report this species is suspected to occur in the southern 

 part of the state, and Britton and Brown give its range as "North- 

 west Territory" ; up to the present it has not been collected. • 



