FLQRA OF MICHIGAN. 167 



541. ASPLENIUM, L. SPLEENWORT. 



1688. A. Trichomaiies, L. N. & U. P. 

 N. E., Winch Cat. ; Keweenaw Point; Isle Royale, Porter. Infrequent. 



1689. A. ebeneum, Ait. 



Allegan, Miss Josie A. Williams. Only station known in the State. 



1690. A. Ruta-muraria, L. 



N. E., Winch. Cat. ; Keweenaw Co., V. Rare. 



*1691. A. angustifolium, Michx. C. & S. 



Rich woods. 8. W., Wright Cat.; Ann Arbor, rare, Allmendinger Cat,; Flint; S. Haven, Bailey, 

 Ionia Co. Infrequent. 



*1692. A. thelypteroicles, Michx. Th. 



Rich woods. Frequent. 



*1693. A. Filix-foemiiia, Bernh. Th. 



Moist woods. Exceedingly variable. Common. 



542. CAMPTOSOKUS, Link. WALKING-LEAP. 



1694. C. rhizophyllus, Link. 



Keweenaw Co., F.; occurs in N. Ohio, and at Owen Sound, Ont. Reported from Alpena, Prof . V. 

 M. Spalding. 



543. PHEGOPTERIS, Fe"e. BEECH FERN. 



*1695. P. polypodioicles, Fee. Th. 



Isle Royale, Dr. A. B. Lyons ; Keweenaw Co., F. ; Frankfort; Inland, Grand Traverse Co.; rocks, 

 Grand Ledge. Abundant northward. 



*1696. P. hexag-oiioptera, Fee. Th. 



Beech woods. Flint; Hubbardston; Ann Arbor, Allmendinger Cat. ; Keweenaw Co., F. Frequent. 



*1697. P. Dryopteris, Fee. Th. 



Open woods. Frequent n. of lat. 43, especially under pines. 



544. ASPIDIUM, Swartz. SHIELD FERN. 



*1698. A. Thelypteris, Swartz. Th. 



Swamps. Frequent. 



* 1699. A. Xoveboraceiise, Swartz. L. P. 



Swamps. Ann Arbor, Allmendinger Cat.; Macomb Co.; Hubbardston; Gore Bay, Manitoulin 

 Island, J. Bell, Canadian Cat. 



1700. A. fragraiis, Swartz. U. P. 



Crevices of shaded cliffs. Isle Royale, and Keweenaw Peninsula, Dr. Lyons. 



*1701. A. spinulosum, Swartz. Th. 



Shady woods. Flint; Hubbardston; L. Superior, D. C. Eaton, Ferns of N. A. 



* 1702. var. intermedium, D. C. Eaton. Th. 

 Woods. Common. 



1703. var. clilatatum, Hook. Th. 



Woods. Ann Arbor, Allmendinger Cat.; Macomb Co.; Flint; Hubbardston; Petoskey, and 

 northward. 



1704. A. Boottii, Tuckerman. 



Alder thickets. Hubbardston ; Ann Arbor, Winch. Cat. Rare. 



*1705. A. cristatum, Swartz. Th. 



Swamps. Frequent. 



*1706. var. Clintonianum, Eaton. Th. 



Ann Arbor, Allmendinger Cat.; Hubbardston. Found at Lake Nipigon, Ont., Macoun. Infrequent. 



