FILICES. 2G3 



spiny-toothed. Pinnse triangiilar-lauoeolate in outline. 

 The variety intermedium, D. C. Eaton, which is very coni- 

 moa ia Canadian woods, has the margin of the indusiiim 

 denticulate and beset with minute stalked glands, the few 

 scales of the stipes pale brown with a dark centre, and the 

 lower pinncB unequal-sided. Var. Boottii (J. Boottii, Tuck- 

 erman) has the scales of the stipe pale brown, the frond 

 olongated-oblong or elongated-lanceolate and pinnules less 

 dissected. Var. dilata'tum, Hook., has the scales of the 

 stipe brown with a dark centre, the frond broader, ovate or 

 triangular-ovate in outline, often twice-pinnate, and the 

 indusium smooth and naked. 



4. A. fra'grans, Swartz. Fronds 4-12 inches high, fra- 

 grant, narrowly lanoeelate, with narrowly-oblong piunately- 

 pn,rted pinna?, their "divisions nearly covered beneath by 

 very large thin indusia. — Eooks, Atl. Prov. and northward. 



5. A. erista'tum, Swartz. StipeschafFy with broad scales. 

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

 pinnse deeply j^innatified , the upper ones triangular-lanceo- 

 late in outline, the lower considerably broader, the lobes 

 cut-toothed.- Fruit-dots large and conspicuous, half way 

 beticeen the midrib of the lobe and the margin. — Swamps. 



, Var. Clintonia'num, D. C. Eaton,. is distinguished chiefly 

 by its greater size and more numerous pinnae and segments. 



6. A. CrOldia'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 pinnae 

 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. — liich moist woods. 



7. A. Fi'lix-mas, Swartz. _(MALE-FBiiN'.) Fronds lanceo- 

 late, very chaffy at the base, twice pinnate except that the 

 upper pinnules run together. Pinnie linear-lanceolate, 

 tapering from the base to the summit. Pinnules very ob- 

 tuse, the basal ones incisely lobed. Fruit dots rather closer 

 to the midvein than the margin. Indusium convex, persist- 

 ent.— Rocky woods, Atl. Pi-ov, 



