SCHOOLCRAFT COUNTY AND VICINITY 79' 



Aspidium thelypteris (L.) Sw. (Dryopteris thelypteris (L.) A. Gray). 

 Marsh shield-fern. Open marshy ground or damp shaded places. Com- 

 mon and often abundant throughout. 



Aspidium noveboracensc (L.) Sw. (Dryopteris noveboracensis (L.) A. 

 Gray). New York fern. Rich open hardwoods. Abundant in beech- 

 maple-birch woods along the Tahquamenon River in Luce and Chippewa 

 Counties. 



Aspidium cristatum (L.) Sw. (Dryopteris cristala (L.) A. Gra\ 

 Crested shield-fern. In damp and swampy places. Frequent. 



Aspidium spinulosum (0. F. Muller) Sw. (Dryopteris spinulosa 

 (Muell.) Kuntze). Spinulose shield-fern. Common in hardwoods 

 throughout. Tn. general appearance much like but generally smaller 

 than the following. 



Aspidium. spinulosum intermedium (Muhl.) DC- (Dryopteris inter- 

 media (Muhl.) Gray). American shield-fern. In damp rich shaded 

 ground and frequent. Much like the preceding but usually larger. 



Cystopteris bulbifera (L.) Bernh. (Filix bulbifera (L.) Underw.) Bulb- 

 let cystopteris. In damp shaded ground. Frequent. 



Onoclea sensibilis L. Sensitive fern. In moist open or shaded ground. 

 Often abundant. 



Onoclea struthiopteris (L.) Hoffm. (Matteuccia struthiopteris (L.) 

 Todaro). Ostrich fern. Usually in shaded alluvial ground and hence 

 very abundant along shaded banks of streams. One of the best of our 

 native ferns for cultivation. Grows best in shade and needs plenty of 

 water. 



OSMUNDACEAE. Flowering Fern Family 



Osmunda regalis L. Royal fern. Flowering fern. Wet open or par- 

 tially shaded ground. Often abundant. 



Osmunda claytoniaua L. Clayton's fern. Interrupted fern. Damp 

 open or partially shaded ground throughout. Fine specimens noticed. 



Osmunda cinnamomea L. Cinnamon fern. In damp open or partially 

 shaded ground throughout. Often plentiful. 



OPKIOGLOSSACEAE. Adder's Tongue Family 



Botrychium obliquum Muhl. Ternate grape-fern. Occasional through- 

 out in open or partially shaded ground. Abundant at Manistique in 

 one place on ground made up of sawdust and bark. 



Botrychium virginianum (L.) Sw. Rattlesnake fern. Frequent 

 throughout in rich shaded ground. 



EQUISETACEAE. Horsetail Family 



Equisetum arvense L. Common horsetail. Common in open or par- 

 tially shaded ground and often acting as a sand binder on sandy shor 

 and along railway embankments. 



