408 
Our most common fern, growing on 4 wide variety of soils in several 
Ww habitats.at chiefly middle elevationse Individuals may be distinguished 
as sun forms by their densely soriferous fronds, (then simulate the more Cinich) 
Cforns of) xeric)Woodsife . 
10, Polystichum Roth. 
Coarse commonly bristly simply pinnate to tripinnate ferns with markedly 
chaffy stipes arising from conspicuously chaffy stout rootstocks, Sori 
roundish with centrally attached peltate firm indusi@e 
D Fronds bipinnate le Pe Andersoni 
O Fronds pinnate 
© principal pinnae short falcate-lenceolate, the lowermost 
rounded or deltoid, thus wholly unlike the upper 2. P. Lonchitis: 
4) Principal pinnse long Palcate-lanceolate, the lowermost 
q) , not essentially unlike the upper, simply reduced 3. Pe munitum 
1, P. Andersoni Hopkinse Slender forns resembling { mut the stipes and 
rachises chaffy with slender often hair-like light-brown scales, blades 
bipinnate, strongly bifacial, the upper surface dark-green, paler beneath, 
4-5 om, long, the pinnae lanceolate to an acute tip, the principal pinnae 
445-590 Cle long, pinnate, the pinnules short-oblong, bluntish, scarcely 
auriculate,diminishing gradually from rachis to the merely lobed apex, 
denticulate with bristle-tipped teeth; sori somewhat confluent, along the 
midvein, never densely covering the pinnuleSse 
Rare, known with us only from deep woods, Hughes Fk», Boundary C06, 
Warren 3176 
