ADDENDA TO THE FLORA OF LYON COUNTY. 215 



Athyrium filix-fcejmina (A.) Roth. (p. 163). 



Sterile immature fronds were common in both counties. 

 Athyrium thelypteroides (Mx.) Dcsv. (p. 164.) 



Young sterile fronds were not rare in Dubuque county. 

 Camptosorus rhizophyllus (Z.) Link. (p. 165). 



Common in both counties. Last year's proliferous 

 fruiting fronds were in excellent condition. 

 Pteridium aquieinum (L.) Kuhn. (p. 166). 



Very young fronds were common in higher woods in 

 Dubuque county. 

 PELL^A atropurpurea (L.) Link. (p. 166). 



Well-fruited last year's fronds were rather common in 

 both counties. 

 Cryptogramma stelleri \Gmel.) Prantl. (p. 167). 



Very common in both counties. Young fruiting fronds 

 were abundant. 

 Adiantum pedatum L. (p. 167). 



Very young fronds were common in both counties. 

 Note: The following locality-specimens, collected by Mr. Herbert 

 Goddard in Winneshiek county, should also have been noted on pp. 162 

 and 163. 



Phegopteris roberti ana (Hoffm.) Fee. (June, 1896). Very close to P. 

 dryopteris, — too close. Some are well-fruited. 



Nephrodium goldieanum (Hk. ) H. & G. (July, 1896). Well-fruited. 



ADDENDA TO THE FLORA OF LYON COUNTY. 



BY B. SHIMEK. 



As a result of a brief visit made in August, 1900, to the 

 large groYe occupying the southwestern corner of Lyon 

 county, Iowa, the writer is enabled to add several species 

 of flowering plants to his recently published list.* 



One additional native tree, Juglans nigra L., the Black 

 Walnut, occurs sparingly on lower slopes, and should be 



* '■'■Flora of Lyon county,'''' lozva Geo/. Sur. vol. x, pp. 157-184, 1900. 



