36 MICHIGAN ACADEMY OP SCIENCE. 



FILIX Adans. CYSTOPTERIS Bernh. 



*29. F. bulbifera (L.) Underw. Cystopteris bulbifera (L.) Bernh. Bulblet 

 Fern. Moist shaded hillsides. Locally frequent. Th. 



*30. F. fragilis (L.) Underw. Cystopteris fragilis (L.) Bernh. Brittle Fern. 

 Woods and river banks. Ann Arbor, Allmend. Cat; Flint; Hubbardston; Alma, 

 C. A. Davis; northward to Lake Superior, Whitney. Th. 



31. F. fragilis tenue (Michx.) Cystopteris fragilis dentata Hook. Keweenaw 

 Co., and Ypsilanti, O. A. Farwell. 



32. F. montana (Lam.) Underw. Mountain Cystopteris. Cystopteris montana 

 (Lam.) Bernh. North shore of Lake Superior, Britton & Brown. 



POLYSTICHUM Roth. ASPIDIUM in part. 



33. P. acrostichoides (Michx.) Schott. Christmas Fern. Aspidium acrostichoides 

 Sw. Shady ground. Th. 



34. P. Braunii (Spenner) Fe. Braun's Holly-fern. Aspidium aculeatum Braunii 

 Doell. Ontonagon Peninsula, Eaton's Ferns of N. A.; Keweenaw Co., O. A. Farwell. 



35. P. Lonchitis (L.) Roth. Holly-Fern. Aspidium Lonchitis Sw. Woods south 

 shore of Lake Superior, Prof. Whitney; Keweenaw Co., O. A. Farwell. 



DRYOPTERIS Adans. ASPIDIUM in part. 



36. D. Boottii (Tuckerm.) Underw. Boott's Shield-fern. Aspidium Boottii 

 Tuckerm. Alder thickets. Hubbardston; Ann Arbor, Winch. Cat; Norway, C. F. 

 Wheeler; Keweenaw Co., O. A. Farwell. 



*37. D. cristata (L.) A. Gray. Crested Shield-fern. Aspidium cristatum Sw. 

 Swamps. Frequent. Th. 



38. D. cristata Clintoniana (D. C. Eaton) Underw. Aspidium cristatum Clin- 

 tonianum D. C. Eaton. Ann Arbor, Allmendinger Cat.; Hubbardston; found at 

 Lake Nipigon, Ont, Macoun; Alma, C. A. Davis. Infrequent. Th. 



39. D. Filix-Mas (L.) Schott. Male Fern. Aspidium Filix-mas Sw. Rocky 

 woods. Keweenaw Peninsula, Lake Superior, A. Gray. 



40. D. fragrans (L.) Schott. Fragrant Shield-fern. Aspidium fragrans Sw. 

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



*41. D. Goldieana (Hook.) A. Gray. Goldie's Fern. Aspidium Goldieanum 

 Hook. Moist woods. Flint; Hubbardston, C. F. Wheeler; Owosso, G. H. Hicks; 

 Black River, St. Clair Co., C. K. Dodge; Alma, C. A. Davis. 



*42. D. marginalis (L.) A. Gray. Evergreen Wood-fern. Aspidium marginale 

 Sw. Hillsides in rich woods. S. Haven, Bailey; Flint; Hubbardston and north- 

 ward. Frequent. Th. 



*43. D. Noveboracensis (L.) A. Gray. New York Fern. Aspidium Noveboracense 

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

 Bay, Manitoulin Island, J. Bell. Canadian Cat. L. P. 

 44. D. simulata Davenport. Belle Isle, O. A. Farwell. 



*45. D. spinulosa (Retz) Kuntze. Spinulose Shield-fern. Aspidium spinulosum 

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

 N. A. Th. 



46. D. spinulosa dilatata (Hoffm.) Underw. Aspidium spinulosum var. dilatatum 

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

 Petoskey, and northward. Th. 



*47. D. spinulosa intermedia (Muhl.) Underw. Aspidium spinulosum var. inter- 

 medium D. C. Eaton. Woods. Common. Th. 



*48. D. Thelypteris (L.) A. Gray. Marsh Shield-fern. Aspidium Thelypteris 

 Sw. Swamps. Frequent. Th. 



PHEGOPTERIS Fee. 



*49. P. Dryopteris (L.) Fee. Oak-fern. Open woods. Frequent north of lat. 

 43, especially under pines. Th. 



*50. P. hexagonoptera (Michx.) Fee. Broad Beech-fern. Beech woods. Flint; 

 Hubbardston; Ann Arbor, Allmendinger Cat.; Keweenaw Co., O. A. Farwell. Fre- 

 quent. Th. 



