PILICES. 261 



3-5 inches long,'' dee i,7y pinndtifij, each of the crowded lobes 

 bearing 3-6 pairs of oblong fruit-dots.— Rich woods. , 



5. A. angUStifO'lium, Michx. Not evergreen. Fronds 

 simply pinnate, somewhat resembling Aspidium acrosti- 



, (AioiAes, hut very smooth and thin , and larger. PinuEe cren- 

 ulate, short-stalked. Fruit-dots- Imofir, crowded.— Rich 

 woods; not common. 



* » Indtiaium curved, delirate, often crossing the vein, thus appearing 

 reniform. ' 



6. A. FiliX-fos'mina, Bernh. Fronds 1-3 feet high, 

 broadly lanceolate in outline, twice- pinnate, the pinnae lanceo- 

 late in outline, and tlie jiinnules confluent by a narrow 

 ijiargin on the rhachis of the pinna, doubly serrate. ladti- 

 sium curved, often shaped something lika a horse-shoe, 

 owing to its crossing the vein and becoming attached to both 

 aides of it. — Rich woods. 



0. W001»W.lKn'I.l, Smith. Chai.v Fern. 

 W. Virgin'iea, Smith. Fronds 2-3 feet higli, pinnate ; 

 piiinfe lanceolate, pinnatifid. Veins forming a single row 

 of meshes next the midrib. — Wet swamps. 



T. SOOLOPEX'mtHiM, Smith. Hart's Tongue. 

 S. VUlga're, Smith. Frond simple, bright green, a foot 

 or more in length, and an inch or more in width. — Shaded 

 ravines and limestone cliffs ; not very common. 



g. CAMPTOSO'IHIS, Link. 'Walking-Leap. 

 C. rhizophyl'lus, Link. A curious little fern, growing in 

 tufts on shaded limestone rocks. Frond simple, with a very 

 long narrow point. — not very common. . 



9. riiE«Ol>'TERIS, FSs. Beech Fern. 

 1. P. polypodioi'des. Fee. Fronds triangular, longer, 

 than broad, 4-6 inches long, hairy on the veins, twice-pin- 

 natifiii, the rhachis winged. The jjinnoe sessile, linear-lance- 

 olate in outline, the lowest pair dcfiexed and standing for- 

 wards. Fruit-dots small and all near the margin. Stipes 

 rather longer than the fronds, from a slender, creeping 



