CRYPTOGAMIA.— FILICES. 37V 



iJAB. Dry woods. April — May. A low spread- 

 ing shrub ; leav. shining above, glauc. beneath. 

 J. J. virginiana : upper leaves imbricate in four rows 

 ovate-lanceolate, pungently acute, appressed ; 

 young ones acerose expanding ; trunk arboreous. 



HAB. Dry rocky places. April. Ji small tree: 

 leav. sometimes ternate ; 6er., sjnall, blue. 

 3. J. prustrata : leaves imbricate id four rows, ovate, 

 submucronate, glandular in the middle, appressed ; 

 berries tubercular; stem prostrate* creeping. 



HAB. Gravelly shores. A shrub with very lone 

 creeping branches ; berries longer than Ao. 2. 



592. TAXUS. Yew. Coniferce. 



F. canadensis . leaves linear, distichous, revolute on 

 the margin ; sterile receptacle globose. 

 HAB. Shady rocks. April. Shrub evergreen, 2 — * 

 4 ft* high ; berries red. 



CRYPTOGAVIIA. 

 F1LK KS. 



* Capsules furnished with an articulated clastic ring 

 transversely opening. 



193. POLYPODIUM. Sori (small clusters of cap 

 sules) roundish, scattered. Involucrum 0. 



S94. HYPOPELTIS. Sori roundish, having a cup- 

 shaped involucrum beneath, divided into 5 — <> 

 irregular segment-. Capsules sessile. 



>95. WOODS1A. Sori roundish, having an involu- 

 crum beneath, which is cut into numerous ca- 

 pillary segments. Capsules pedicellate. 



r >9G. ASPIDIUM. Sori rduhditfti or elliptical, scat- 

 tered, liivolurrum umbilicalc, or opening OH 

 one side. 



>07. ASPLKNU'M. Sort linear, straight, more or 

 lefli transverse. Invoho rum arising from the 

 lateral veins, and opening toward- the central 



