264 COMMON CANADIAN WILD PLANTS. 



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

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

 lanceolate in outline, broadest above the base. Pinnules 

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

 Rich woods, mostly on hill-sides. 



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

 and accompanying description.) Rich 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 plentifujl in rocky woods west of Colling- 

 wood, Ont. 



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

 twice pinnate, 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. Ravines and deep woods, Atl. Prov. 



11. CYSTOP'TERIS, Bernhardi. BLADDER FERN. 



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

 and very delicate, twice-pinnate, the pin n re nearly at right 

 angles to the rhachis. Rhachis and pinnae usually with 

 bulblets beneath. Pinnules toothed. Shady, moist ravines. 



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

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

 winged. Shady cliffs. 



18. snn TIIIOP i I:KIS, Willd. OSTRICH FERX. 

 S. German'ica, Willd. (Onoclea StrtUhvopterig, 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. OXOCLE'A, L. SENSITIVE FERN. 



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

 accompanying description.) Common in wet grounds along 

 streams. 



