264 COMMON CANADIAN WILD PLANTS. 



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

 Fronds ovate-oblong in outline, twice-pinnate, the pinnse 

 lanceolate in outline, broadest above the base. Pinnules 

 crenate-margined. Fruit-dots large, close to the margin. — 

 Kioh woods, mostly on hill-sides. 



9. A. aerostiehoi'des, Swartz. (See Pigs. 264 and 265, 

 and accompanying description.) — !Rich woods. 



10.' A. Lonchi'tis, Swartz. Not unlike No. 9, but the 

 fronds are narrower and longer, more rigid and with hardly 

 any stipe. Pinnae densely spinulose-toothed. — Apparently 

 not common, but plentiful in rocky woods west of Colling- 

 wood, Ont. 



11. A. aeulea'tum, Swartz, var. Braun'il, Koch. Fronds 

 ^wiceyinnaie, oblong-lanceolate, narrowing gradually toward 

 the base. Pinnules ovate or oblong, truncate and nearly 

 rectangular at the base (the lower short-stalked), beset with 

 long and soft as well as chaffy hairs. Indusium fixed by 

 the centre. Fronds evergreen, very chaffy on the stalk and 

 rhachis. — Eavines and deep woods, Atl. Prov. 



II. CYSTOP'TEKIS, Bernhardi. Bladder Fern. 



1. C. bulbif era, Bernh. Frond large (1-2 feet), narrow 

 and very delicate, twice-pinnate, the pinnae nearly at right 

 angles to the rhachis. Ehachis and pinnae usually with 

 bulblets beneath. Pinnules toothed. — Shady, moist ravines. 



2. C. fra'gilis, Bernh. Frond only 4r-8 inches long, with 

 a stipe of the same length, twice- or thrice-pinnate. Hhachis 

 winged. — Shady cliffs. 



It. STBVTHIOP'TERIS, Willd. Ostrich Ferh. 

 S. German'iea, "Willd. {Onodea Struthiopteris, Hoff.) 

 Sterile fronds with the lower pinnae gradually much shorter 

 than the upper ones. Pinnae deeply pinnatifid. — Common 

 in low, wet grounds along' streams. 



13. ONOCIE'A, L. SENsmvE Fern. 

 0. sensib'iliS, L. (See Figs. 266, 267, 268 and 269, and 

 accompanying description.) — Oommonin wetgroundfr along 



streams. 



