146 THE PLANT WORLD. 



almost everywhere, but principally along the lower portions. In 

 several marshy and bushy tracts on the lower southern portions of 

 the bluff occurs Dryopteris Thelyptcris, while close by a few plants of 

 Osmunda regalis were found, its relatives, O. Claytoniana and O. cin- 

 namoniea^ being fairly abundant in the rrioist and bushy gorges among 

 the rocks. Here and there on the dryer and more exposed portions 

 of the cliffs Asplcnhnn platyneuron is rare, while common on the east- 

 ern slope where exposed to more sunlight, and Woodsia obtiisn is 

 found in similar situations. Almost everywhere that most abundant 

 of ferns, Dryopteris acrostichoides, is to be found, but in the moister 

 and richer rocky gorges its large, dark green fronds reach their most 

 perfect development. On the wettest ledges the delicate fronds of a 

 bed of Asplenium acrostichoidcs grace a most luxuriant surrounding, 

 while close at hand the more graceful Dicksonia {^Dcnnstczdtia puiicti- 

 lobuld), hangs in abundance. Asploiinvi Filix-fcvmina is not common 

 anywhere and but few plants of BotrycJiium Virginiamiin were 

 noticed. In crevices about the lower portions of the cliffs a few 

 walking-ferns {Camptosoriis rJiizopJiyllus), occur, while near them, but 

 usually in the moister crevices the beautiful little tufts of Asplenium 

 tricJiomanes were numerous. Here and there in ravines a few plants 

 of Dryopteris spinulosa intermedia reared their graceful fronds, while 

 Phegopteris hexagonoptera were numerous about the run that borders 

 the western end of the bluff. While examining a number of plants of 

 Asplenium angustifoliuni growing in the sand at the freshet line on 

 the eastern end of the bluff, numerous fronds of the tall Onoclea 

 Strut Jiiopteris were noticed for the second time in the vicinity, a single 

 plant having been found three weeks earlier by another collector on 

 an island almost directly opposite. Further down along the edge of 

 the water line, and generally among the rocks and bushes, were 

 numerous plants of Onoclea sensibilis. 



The possibilities of the fern life of Hemlock. Bluff are probably 

 not exhausted by the above list of twenty-three species, and it might 

 be well to mention others which I have found in the vicinity. On 

 August 29, 1885, I found in the crevices of a rocky bluff, several 

 miles further up the river, a number of tufts of Asplenium montanum, 

 our smallest fern, and which have since been exterminated by the in- 

 roads of the polypody. On a recent visit, however, a few plants were 

 found on another portion of the bluff and steps taken to allow of their 

 increase. In a ravine not far away, in August, 1878, a large clump 

 of Dryopteris Boottii was found, and later Mr. H. W. Henshaw found 

 several plants on Pimmitt Run nearer Washington. Several miles 

 below Scott Run, in a ravine, Dryopteris Goldieana occurs in some 

 abundance and Cystopteris fragilis sparingly in suitable places. At 



