232 MICHIGAN SURVEY, 1908. 



99. Adiantum pedatum L. Maiden-hair Fern. Sparingly distri 

 buted in the mesophytic forest. Ill, 4, and at Washington Club (forest). 



100. Pt'eris aquilina L. Brake. Abundant in open, drier places, 

 especially in burned areas. 



101. Cryptogramma acrostichoides R. Br. American Eock Brake. 

 In dense patches on exposed bed-rock where thinly soil-covered. Upper 

 end of Eock Harbor and I, 1. 



102. Polaypodium vulgare L. Common Polypody. Tops and exposed 

 edges of cliffs. Common. I, 1. 



Equisetaceae — Horsetail Family. 



103. Equisetum arvense L. Between forest and bog margin, Forbes 

 Lake, II, 5. 



104. Equisetum sylvaticum L. Wood Horse-tail. Moist woods. II, 

 1. Noted in one locality only. 



105. Equisetum palustre L. Marsh Horse-tail. Wet, back-margin of 

 bog. 



106. Equisetum flwrnatile L. Swamp Horse-tail. In water upper 

 end of Rock Harbor. Ill, 3. 



107. Equisetum- scirpoides Michx. Depression in Arbor-vitae swamp 

 along Siskowit Lake portage, (V, 9). 



Lycopodiaceae — Club-Moss Family. 



108. Lycopodium selago L. Fir Club Moss. Rare. Exposed rocks 

 at Scovill Point, IV, 1. 



109. Lycopodium lucidulum Michx. Shining Club Moss. Edge of 

 rock pools Scovill Point, IV, 1, and in moist woods, III, 4. 



110. Lycopodimn inundatum L. Bog Club Moss. Wet bog margin, 

 Sumner Lake. Ill, 5. 



111. Lycopodium. obscurum L. Ground Pine. Sparingly distributed 

 in moist woods. I, 3. 



112. Lycopodium. olavatu-m L. Running Pine. Common in dry to 

 moist woods. Ill, 4 ; V, 4 ; I, 3. 



113. Lycopodium complanatum L. Fairly common in woods and 

 shady places^ V, 4; III, 4. 



114. Lycopodium annotinum L. Stiff Club Moss. Cool, dry woods. 

 V, 4. 



Selaginellaceae — Selaginella Family. 



115. Selaginella rupestris (L) Spring. On thinly soil-covered rocks 

 along Siskowit Lake portage (V, 9). Sparingly distributed. 



Isoetaceae — Quillwort Family. 



116. Isoetes sp? In shallow water at upper end of Rock Harbor, 

 III, 3. 



Spermatophytes. (Seed Plants). 



Naiadaceae — Pondweed Family. 



117. Potamogeton natans L. Fairlv common on margin of Sumner 

 Lake. Ill, 5. 



