FILICES. 179 



* * Stipes cha/y. 



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

 Fronds large, ovate-lanceolate in outline, twice-pinnate, the pin- 

 nules deeply pinnatifid (nearly pinnate), and spiny-toothed. 

 Piuiiaj triangular-lanceolate in outline. The variety inter- 

 medium, which is very common in Canadian woods, has the few 

 scales of the stipe pale brown with a dark centre, and the lower 

 pinncB unequal-sided. Var. Boottii has the scales of the stipe 

 pale brown, the frond elongated-oblong or elongated-lanceolate 

 and pinnules less dissected. 



4. A. Clista'tum, Swartz. Stipes chaffy with broad scales. 

 Fronds large, linear-lanceolate in outline, once-pinnate, the 

 pinnae deeply pinnatifid, the tipper ones triangular-lanceolate in 

 outline, the lower considerably broader, the lobes cut-toothed. 

 Fruit-dots large and conspicuous, haff way between the midrib of 

 the lobe and the margin. Swamps. 



5. A. Goldia'num, Hook. A fine fern, the large fronds 

 growing in a circular cluster from a chaffy rootstock. Frond 

 ovate or ovate-oblong in outline, once-pinnate, the pinnai deeply 

 pinnatifid, 6-9 inches long, broadest in the middle, the lobes 

 slightly scythe-shaped, finely serrate. Fruit-dots large, near the. 

 midrib of the lobe. Rich moist woods. 



6. A. margina'le, Swartz. Stipes very chaffy at the base. 

 Fronds ovate-oblong in outline, twice-pinnate, the pinnie lance- 

 olate in outline, broadest above the base. Pinnules crenate- 

 margined. Fruit-dots large, close to the margin. Rich woods, 

 mostly on hill-sides. 



7. A. acrostichoi'des, Swartz. (See Figs. 264 and 265, and 

 accompanying description.) Rich woods, everywhere. 



8. A. Lonchi'tis, Swartz. Not unlike No. 7, but the fronds 

 are narrower and longer, more rigid and with hardly any stipe. 

 Pinnse densely spinulose- toothed. Apparently not common, but 

 plentiful in rocky woods west of Collingwood, Out. 



11. CYSTOP'TERIS, Bernhardi. BLXDDER FEBN. 



1. C. bulbil'era, Bernh. Frond large (1-2 feet), narrow and 

 very delicate, twice-pinnate, the pinna; nearly at right angles to 



