26-t COMMOX CANADIAN WILD PLANTS. 



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

 Fronds ovate-ohlong in outline, twice-pinnate, th^ pinnae 

 lanceolate in outline, broadest above the base. Pinnules 

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

 .Rich woods, mostly on hill-sides. 



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

 and accompanying description.) — Eich woods. 



10. A. Lonehi'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'ii, Koch. Fronds 

 /trice pinnate, oblong-lanceolate, narrowinggradually toward 

 the base. Pinnules ovate or oblong, truncate a:nd nearly 

 I'cctangular at the base (the lower short-stalked), beset with 

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

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

 rhaohis. — Kavines and deep woods, Atl. Prov. ■ 



II. CYSTOP'TKieiS, Boniliardi. Bladder Febn. 



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 

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



2. C. fra'gilis, B§rnh. Frond only 4^8 inches long, with 

 a stim; of the same length, twice- or thrice-pinnate. Rhachis 

 winged. — Shady cliffs. 



18. STUUTHIOP'TKUIS, Willd. OSTHICH FEKN. 



S. German'iea, Willd. {Onoclea 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. 



IS. O.MOOLE'A, I.. Sknsitivk Fehn. 

 0. sensib'ilis, L. (See Figs. 26fi, 207, 2G8 and 269, and 

 accompanying description.] — Common in wet grounds alobg 



streams. 



