CRYPTOGAMIA.— F1LICES. 385 



HAB. Rocky woods. About 1 ft. high ; stipe slend., 

 black, polish. ; frond ample ; segm. entire below. 



002. CHEILANTHES. 



C. veslita : frond bipinnate, hairy on both sides ; seg- 

 ments oblong, obtuse, very entire ; stipe and 

 rachis hairy. 

 HAB. Rocks. About 4 in. high, covered with chaffy 

 brown hair. 



003. HYiMENOPHYLLUM. 



\\. ciliatum: frond pinnate ; lower divisions larger, up- 

 per ones gradually smaller, pinnatifid ; segment* 

 linear, obtuse, bifid, ciliate, hairy on the veins ; 

 rachis and stipe winged, ciliate. 

 HAB. Trunks of trees. 



604. ONOCLEA. Sensitive fern, 



' ). sensibilis : sterile frond, pinnate ; segments lacinate. 

 the upper ones united; fertile frond bipinnate, re- 

 sembling a compound spike, with recurved globu- 

 lar segments. 



HAB. Low ground--. Fronds about a foot high; 

 cterile dilated, suhtriang. ; fertile very narrow. 



(S. obtusiloba : divisions of the frond opposite, pinna- 

 tifid, with rounded lobes. 



HAB. Low grounds. Smaller than the preceding, 



005. STRUTHIOPTERIS. 



S, pennsylvanica : j-tcrile frond bipinnntitid ; segments 



entire, obtuse, the lowest elongated and recurved. 



HAB. Low grounds. About 2 ft. high ; fertile 



frond resembl . a compound spike ; seg. lin., num. 



. OSMUNDA, Flowering fern. 



I. O. cinnamomea : sterile frond pinnate j OlTiaioiU 



pinnatifid ; segments ovate, oblong-obtuse, very 



entire ; stipe woolly ; fertile frond bipinnate. 



woolly. 



HAB. Low grounds. Fronds 3 — 5 ft. high ; slip? 



K k 2 



