MICHIGAN ACADEMY OF SCIENCE. Ill 



8. Asplenium Filix-foemina (L.) Bernh. Lady Fern. Bog forest; wet 

 places in climax forest ; occasional in sheltered rock shore crevices. 



9. Aspidium Thelypteris (L.) Sw. Marsh Shield Fern. Sedge zone, bog 

 Succession, frequent; bog forest. 



10. Aspidium fragrans (L.) Sw. Fragrant Shield Fern. Rock shore crevi- 

 ces; exposed interior cliffs. 



*11. Aspidium Filix-mas (L.) Sw. Male Fern. "Fairly abundant in rich 

 moist woods. Especially abundant near Benson Brook." Holt. 



12. Aspidium cristatum (L.) Sw. Crested Shield Fern. Climax forest; 

 Siskowit Bay. 



13. Aspidium spinulosum (0. F. Miiller) Sw. Common Shield Fern. Cli- 

 max forest, frequent. 



14. Aspidium spinulosum (0. F. Miiller) Sw. var. dilatatum (Hoffm). Hook 

 Raspberry Island. 



15. Cystopteris bulbifera (L.) Bernh. Bladder Fern. McCargoe's Cove. 

 Rare. 



16. Cystopteris fragilis (L.) Bernh. Fragile Fern. Climax forest, on 

 rocks and cliffs; sheltered shore rocks. 



17. Woodsia ilvensis (L.) R. Br. Rusty Woodsia. Rock shore crevices ; 

 exposed interior cliffs. 



*18. Onoclea sensibilis L. Sensitive Fern. ''Fairly abundant." Holt. 



19. Onoclea Struthiopteris (L.) Hoffm. Ostrich Fern. Brook bank in 

 forest; Sargent Lake trail near Rock Harbor. 



Osmundaceae. Flowering Fern Family. 



20. Osmunda regalis L. Royal Fern. Brookside at Forbes Lake, only 

 locality. Same occurrence noted by Holt. 



21. Osmunda Claytoniana L. Interrupted Fern. Wet place in climax 

 forest near Tobin's Harbor. 



22. Osmunda cinnamomea L. Cinnamon Fern. Stream bank in climax 

 forest: Sargent Lake trail near Rock Harbor. 



Ophioglossaceae. Adder's Tongue Family. 



23. Botrychium Lunaria (L.) Sw. Moonwort. Open burn forest, abun- 

 dant in one locality near Park Place. 



24. Botrychium tematum (Thumb.) Sw. var. intermedium D. C. Eaton. 

 Grape Fern. (Occasional: l)urn forest; rock shore crevice. 



25. Botrychium virginianum (L.) Sw. Rattlesnake Fern. Bog forest, oc- 

 casional. 



Equisetaceae. Horsetail Family. 



26. Equisetum arvense L. Common Horsetail. Occasional in diverse 

 habitats; sphagnum-shrub stage of Bog Succession, shingle beach. 



27. Equisetum sylvaticum L. AVood Horsetail. Bog forest, abundant. 



28. Equisetum palustre L. Swamp Horsetail. Sedge zone of Delta Swamp 

 Succession. 



29. Equisetum fluviatile L. Water Horsetail. Aquatic zones of Bog and 

 Delta Swamp Successions, common; sedge zone as relict from aquatic zone. 



30. Equisetum scirpoides Michx. Park Place. 



