262 COMMON CANADIAN WILD PLANTS. 



rootstock. Apparently not common, but growing in rich 

 woods near Barrie, Ont. 



2. P. hexagonop'tera, Fee. Fronds triangular, gener- 

 ally broader than long, 7-12 inches broad. Pinnae lanceo- 

 late ; the lowest very large, their divisions elongated and 

 pinnatifid, the basal divisions decurrent on the main rhachis 

 and forming a many-angled wing. Fruit-dots not exclu- 

 sively near the margin. Kich woods. 



3. P. Dryop'teris, Fee. Fronds broadly triangular in 

 outline, primarily divided into 3 triangular spreading 

 petioled divisions, smooth, the three divisions once- or twice- 

 pinnate. Fronds from 4 to 6 inches wide. Fruit-dots near 

 the margin. Rich woods ; common. Whole plant delicate, 

 and light green in colour. 



4. P. ealca'rea, Fee. Closely resembling P. Dryopteris, 

 but differs in the fronds being minutely glandular and some- 

 what rigid, and in the lowest pinnae on the lower side of the 

 lateral divisions proportionally smaller. Rocky hillsides, 

 Restigouche River. 



10. ASI'ID'IUM, Swartz. SHIELD FERN. WOOD FERN. 

 * Stipes not chaffy. 



1. A. thelyp'teris, Swartz. Fronds tall and narrow, 

 lanceolate in outline, pinnate, the pinnae deeply pinnatifid, 

 nearly at right angles to the rhachis, linear-lanceolate in 

 outline, the margins of the lobes strongly revolute in fruit. 

 Stipe over a foot long, and usually longer than the frond. 

 Common in low, wet places. 



2. A. NovebOPaeen'se, Swartz. Fronds much lighter in 

 colour than the preceding, tapering towards both ends, pin- 

 nate, the pinnae deeply pinnatifid, much closer together 

 than in No. 1, and not at right angles with the rhachis. 

 Veins simple. Lower pinnae short and deflexed. Swamps. 



* * Stipes chaffy. 



3. A. spinulo'sum, Swartz. Stipes slightly chaffy or 

 scaly. Fronds large, ovate-lanceolate in outline, twice-pin- 

 nate, the pinnules deeply pinnatifid (nearly pinnate), and 



