496 The Cryptogamous Plants of Dr. Roxburgh, 



linear, (2-3 feet long ;) leaflets broad-ensiform, with serrate, 

 barren points ; near the base often pinnate, the rest deeply 

 pinnatifid ; segments thereof linear, crenulate, obtuse, in- 

 curved. Fructifications in two crowded lines, parallel with 

 and close to the nerve of the segments. Involucre obscure. 



Nat, of Amboyna and Pullo Pinang, climbing, in open 

 situations, over fallen trees, &c. 



43. P. dubium. R. Davallia Roxburghii. Wall. Cat. 66, 

 No. 2218. 



Fronds alternately quadri-pinnatifid, smooth, (several feet 

 high ;) its ultimate divisions obtuse, tending to be trapezi- 

 form, and more or less deeply gashed. Fructifications in 

 solitary spots at the bottom of the fissures of the leaflets. In- 

 volucre opens on the anterior margin, forming a pouch. 



Nat. of the Moluccas. Is probably a Davallia. 



44. P, oemulum. Ait. Kew, 3. 466. 



Fronds quadri-pinnatifid, smooth, and delicate ; ultimate 

 divisions narrow-trapeziform-oblong, sides pinnatifid, or 

 gashed and denticulate at tip. Fructifications solitary on 

 the segments. Involucre reniform, peltate and ciliate. 



Nat. of the mountains north of Rohilcund, 



10. ASPLENIUM. 



Fructifications disposed in straight, subparallel lines. In- 

 volucre originating laterally from a vein, and separating in- 

 wards. 



1. A. Nidus. Linn, Wall. Cat. 63, No. 198. 



Fronds simple (1-3 feet,) subsessile, linear-lanceolate, en- 

 tire, glossy ; veins numerous and parallel. Fructifications in 

 approximated lines, with a very conspicuous involucre, sepa- 

 rating upwards and inwards, (that is, towards the apex of the 

 leaf.) 



Nat, of Chittagong, Malay Islands, &c. It grows in large 

 compact bowl- shaped tufts, not unlike a bird's nest ; the 

 specific name is therefore particularly appropriate. 



