102 



Our Native Ferns. 



cut into narrow small lobes and teeth, otherwise as the last. N. 

 Eng. to Wis. and southward. III. 



*** Vernation wholly inclined, in the fertile segment recurved. 



6. B. lanceolatum, Angs. Plant 3' — 9' 

 high, somewhat fleshy; sterile segment 

 closely sessile at the top of a long common 

 stalk, in the smallest forms three-lobed, in 

 larger ones broadly triangular, twice pinnat- 

 ifid, the divisions lanceolate entire or 

 toothed, all set at an oblique angle ; fertile 

 segment short-stalked, slightly overtopping 

 the sterile, bi — tripinnate. Bud smooth ; the 

 fertile segment recurved its whole length, : , 

 the shorter sterile segment reclined upon it. 

 (Fig. 33.) N. Eng. to Lake Superior and 

 Ccl. III. 



7. B. Virginianum, Swz. (Rattle- 

 snake-fern.) Plant from a' few inches to ... 

 two feet high; sterile segment sessile above 3.^L:coto(«m,°An^.° ■ 

 the middle of the stalk, broadly triangular, (After Davenport.) 

 thinly herbaceous, ternate ; the short -stalked primary divisions 

 once to twice pinnate, then once or twice pinnatifid; lobes ob- 

 long, cut-toothed toward the apex ; fertile segment long-stalkedj 

 bi — tripinnate. Bud pilose, enclosed in a smooth upright cavity 

 at one side of the lower part of the stalk ; fertile segment recurved 

 its whole length, the longer sterile segment reclined upon it. N. 

 Brunswick to Fla. and westward to Cal., Ore. and wr T. III. 



