76 MICHIGAN SURVEY, 1905. 



occurring on the Middle Beach of Lake Superior, I, and on the mountain 

 top, cliff and talus slopes, III. 



10. Parmelia conspersa (Ehrh.) Ach. This is the most characteristic 

 form on rock habitats in this region. It occurs abundantly on the Middle 

 Beach of Lake Superior, I, and on the mountain top, cliff, and talus slopes, 

 III. 



11. Peltidea (Peltigera) aphthosa (L.) Ach. Found quite commonly on 

 rocks in the pine zone, III. 3, and with the Cladonias near the bottom of 

 the talus slopes, III. 



12. Stereocaulon coralloides Fr. On the mountain top, cliff, and talus 

 slopes, III. 



13. Sticta pulmonaria (L.) Schau. Occasional on the trunks of fallen 

 tamarack trees, IV. 4. 



Ophioglossaceae Presl. Adder's-Tongue Family. 



14. Botrichium virginianum (L.) Sw. In the climax forest, II. 2, IV. 

 3, VI. 



Osmundaceae R. Br. 



15. Osmunda cinnamomea L. Cinnamon Fern. Occasional in the alder 

 thickets along Carp river, IV. 2. 



16. Osmunda claytoniana L. Clayton's Fern. In hardwood forest, II. 



2, VI, (Macduff). 



Polypodiaceae R. Br. Fern Family. 



17. Polypodium vulgare L. In exposed situations, occurring commonly 

 on the Upper Beach of Lake Superior, I; on the bald areas on the mountain 

 top, III. 2,5,6; in the aspen zone, II. 5, and III. 1, 4; in the pine zone, III. 



3, and on the lower parts of the talus slope. 



18. Adiantum pedatum L. Maiden-hair Fern. Common in the meso- 

 phytic forest, II. 2, IV. 3, VI. 



19. Pteridium aquilinum (L.) Kuhn. Brake. In open places in the 

 forest, II. 2, IV. 3, VI, becoming more abundant in the open woods toward 

 the top of the ranges and on the foot of the talus slope. Especially abundant 

 in the aspen zone bordering the mountain top, II. 5, III. 1, 4. Also in the 

 pine zone, III. 3. 



20. Asplenium trichomanes L. Spleenwort. In rock crevices on the 

 mountain top, III. 2, 5, 6, and on ledges and in crannies on the cliff face, III. 



21. Polystichum lonchitis (L.) Roth. Holly-fern. In rock crevices 

 on the mountain top, III. 2, 5, 6; on ledges on the cliff face, and in front 

 of the forest on the lower part of the talus slopes, III. 



22. Dryopteris spinulosa (Retz) Kuntze. In the hardwood forest, II. 2. 

 Common. 



23. Onoclea sensibilis L. Sensitive Fern. In the alder thickets along 

 Carp river, IV. 2, and on the banks of Carp creek, VI. 



Equisetaceae Michx. Horsetail Family. 



24. Equisetum sylvaticum L. In the forest in the valley of Carp river. 

 IV. 3, and on Government Peak, VI, (Macduff). 



25. Equisetum littorale Kuehl. On the delta of Carp river, V. 2. 



26. Equisetum fluviatile L. On the submerged part of the delta in Carp 

 Lake, V. 2; about the margin of Carp Lake, V. 1, and about the. margin and 

 on the delta of Little Carp Lake, VII. 1. 



