394 Class XXIV. Order I. 



opposite, linear- lanceolate, somewhat repand, their base 

 truncated on the upper, and rounded on the lower side. 



About a foot high with broad, entire leafets, with the fructi- 

 fication diverging like veins from the midrib. Sy/amps and low 

 woods. 



452. PTERIS. 

 PTERIS AOJJILINA. L. Common Brake. 



t 



Frond more than decompound ; divisions pinnate ; 

 segments oblong-lanceolate, the lower ones pinnatirid ? 

 upper ones entire and smaller. 



Very common in woods, and about the borders of fields and 

 pastures. Stipe erect, smooth, dividing by large, opposite 

 branches, which are again subdivided. Segments or leafets ses- 

 sile, oblong, tapering to an obtuse point, the lower ones largest, 

 their edge divided into large, obtuse teeth, by a sort of serpen- 

 tine line ; upper ones entire, obtuse. The fructification grows 

 in a continued, narrow line at the edges of the frond, and is 

 covered by its refiexed margin. Perennial. 



453. WOODWARDIA. 



WOODWARDIA ONOCLEOIDES. Willd. Simple Woodwardia. 

 Barren fronds pinnatifid, the segments lanceolate, 

 repand, slightly serrulate ; fertile fronds pinnate ; seg- 

 ments linear, entire, acute. 

 Syn. ONOCLEA NODULOSA. MX. 



About a foot high. Stipe smooth or slightly paleaceous. Bar- 

 ren frond composed of oblong-lanceolate segments connected at 

 base, the lower ones often distinct, the edges minutely but sharp- 

 ly serrulate. Barren fronds about the same length with linear 

 divisions, revolute at the edge, bearing the fruit in oblong 

 masses on the back, parallel to the middle rib. Wet swamps. 

 Perennial. 



WOODWARDIA VIRGINICA. Willd. Virginian Woodwardia. 



Frond pinnate ; the divisions pinnatifid ; fructifica- 

 tion in interrupted lines near the midrib of the divisions 

 and segments. MX. sub. syn. 



