138 SIXTEENTH REPORT. 



Asplenium angustifolium Alichx. Narrow-leaved Spleenwort. — Occasional 

 in rich woods. Newton Tripp. 



Asplenium acrostichoides Sw. Silvery Spleenwort. — In moist woods. 

 Newton Tripp. A]i]iarently rare. 



Asplenium filix-femina (L.) Bernh. Lady Fern. — Very common on open, 

 damp ground or in damp, open thickets. 



Polystichum acrostichoides (]\Iichx.) Schott. Christmas Fern. — Frequent 

 in dam]:> woods and on shady banks of streams. 



Aspidium thelypteris (L.) Sw. Marsh Shield Fern. — Very common on 

 marshy ground and in damp thickets. 



Aspidium noveboracense (L.) Sw. New York Fern. Noticed in rich woods 

 near Forest, Ont. Apparently infrequent. N. Tripp. 



Aspidium marginale (L.) Sw. Evergreen Wood Fern. — Frequent in rich 

 woods and on shaded banks of streams. 



Aspidium goldianum Hook. Goldie's Fern. — Occasional in rich woods and 

 shaded alluvial ground. Newton Tripp. 



Aspidium cristatum (L.) Sw. Crested Shield Fern. Frequent in open 

 swampy ground or damp thickets. Newton Tripp. 



Aspidium cristatum clintonianum D. C. Eaton. Clinton's Crested Shield 

 Fern. — Damp rich woods near Port Franks. 



Aspidium spinulosum (O. F. Miller) Sw. Spinulose Shield Fern. — Com- 

 mon in rich woods. 



Aspidium spinulosum intermedium (Muhl.) D. C. Eaton. — American 

 Shield-Fern. — Common in rich woods and thickets. 



Cystopteris bulbifera (L.) Bernh, Bulb-bearing Fern. — ^Occasional along 

 shaded banks of streams and in rich open woods. 



Cystopteris fragilis (L.) Bernh. Brittle Fern. ^Frequent in damp rich 

 woods. 



Onoclea sensibilis L. Sensitive Fern. — Very common in damp open 

 woods and thickets. 



Onoclea struthiopteris (L.) Hoffm. Ostrich Fern. — Occasional in damp 

 woods and thickets. Newton Tripp. One of our best ferns for cultivation. 



Osmundaceae. Flowering Fern Family. 



Osmunda regalis L. Flowering Fern. — Very common in swamps, wet 

 and marshy places. 



Osmunda claytoniana L. Clayton's Fern. — Common in damp open woods 

 and thickets. A beautiful fern for cultivation. The finest specimens no- 

 ticed on Squirrel Island, one of the delta islands of St. Clair River. 



Osmunda cinnamomea L. Cinnamon Fern. — Very common in damp open 

 woods and thickets. A fine fern for cultivation. 



Ophioglossaceae. Adder's Tongue Family. 



Ophioglossum vulgatum L. Adder's Tongue. — Occasional on the delta 

 islands of St. Clair River. A plant easily overlooked. 



Botrychium obliquum Muhl. Ternate Grape-fern. — Occasional in open or 

 slightly shaded ground on the delta islands of St. Clair River. 



Botrychium virginianum (L.) Sw. Rattlesnake Fern. — Common in rich 

 open woods and thickets. 



