98 The Ottawa Naturalist. [Nov. 



in a shaded ravine through which water flowed in the spring. It 

 was rooted in clay loam and shaded densely by beech and maple. 

 It was associated with Adiantum and Aspidium spinulosum var. 

 intermedium. In Huron County the fern was found in abundance 

 in rather mucky soil at the bottom of a ravine, which served as a 

 water course during a part of the year. A dense shade was given 

 by maple and beech, with an occasional hemlock. The ferns 

 associated with it were those mentioned above and Polystichum 

 acrostichoides. With the exception of the soil, the two stations 

 are identical. The fact of the water course underlying the habitat 

 in each case is important in the facilities it gives for drainage. 



Asplenium acrostichoides Sw. (Silvery Spleenwort). 

 This fern requires a mucky, springy situation, but dense shade 

 does not appear to be a necessity. The fern is found associated 

 with Impatiens and fraternizing with Onoclea Struthiopteris and 

 Cystopteris bulbijera. The station has usually scattered trees 

 of beech, maple, ash and birch. 



Phegopteris Dryopteris (L.) Fee. (Oak Fern). The 

 favorite habitat of this fern is at the edge of mucky soil, 

 especially where it is shaded by maple and beech. It is found 

 growing, also, in cedar swamps, on knolls, in mucky soil. Shade 

 in this case is produced by pines and cedars. In this station the 

 fern is sometimes associated with A. marginale. This fern is 

 able to do well under decidedly dry conditions if it is not exposed 

 to the sun. Growing in the open it becomes invariably infested 

 with a blight that shrivels the fronds. 



Phegopteris polypodioides Fee. (Long Beech Fern). In 

 most cases this fern and the preceding are associated, but the 

 Beech Fern is much more sensitive to lack of moisture and 

 requires shade that is extremely dense. A typical locality 

 noted was one in which the fern was found growing in a slightly 

 muckv, reddish clay loam, where the soil was overlying a sand- 

 stone stratum and was of little depth. T he timber, in consequence 

 of this lack of soil, was small, tut so close together as to produce 

 a very dense shade. Shade producing plants present were 

 beech, maple and hemlock, but occasionally also birch and 

 basswood. The location described is situated at Inglewood, in 

 Peel County, about three miles south of Credit Forks. The same 

 escarpment is found there as at the Forks, but the overlying 

 limestone is absent. 



Dicksonia punctilobula (Mich.) Cray. (Hay-scented 

 Fern). This fern was found in the same locality as the preceding 

 but the soil, while slightly mucky, was less so than in the 

 habitat of that species. 



