CRYPTOGAMIA— FILICES. Trichomanes. 311 



the east, not the north-west. Mr. W. Wilson. On Ben Lawers, 

 Scotland. Mr. Dickson and Mr. G. Don. Sent from Scotland, 

 by the Rev. Dr. Stuart. 



Perennial. July. 



Rather smaller than the foregoing, and less upright, with a more 

 rusty aspect. Stalk less elastic. Lecifleis shorter, rounder, with 

 more rounded lobes, and broader at the base, not quite so deeply 

 pinnatifid. The two species appear to me very distinct, though 

 similar. 



472. TRICHOMANES. Bristle-fern. 



Linn. Gen. bGO. Juss. 16. Sm.in Rees's Cijcl.v.36. Act.Taurin. 

 u. 5.417. Tracts2bo. Sw. Sijn.Fil.\A\. fVilld.Sp. PL v. b. 498. 

 Lam. ^ 871. Spreng. Crypt, f. 35. 



Nat. Ord. see w. 463. 



Masses of cajjsules roundish, terminal, imbedded in the 

 margin, or segments, of the frond. Cover urn-shaped, 

 of the texture of they^'owc?, and continuous with it, of 

 one leaf, dilated upwards, and opening outwards, per- 

 manent. Capsules several, sessile, crowded at the base 

 of a permanent cylindrical coinmon receptacle^ whose ca- 

 pillary naked point projects beyond the cover, each 

 roundish, of 2 valves, bound by a vertical jointed ring. 



A numerous genus of herbaceous ferns, with creeping, 

 seldom tufted, roots, of many crooked fibres. Frond 

 pellucid, veiny, either undivided, lobed, or copiously 

 pinnatifid, with decurrent, entire or serrated, segments, 

 the whole mostly of a dull or brownish green. Covers 

 either forming a marginal series, or solitary at the ends 

 of the segments, each terminating a rib, or vein ; very 

 rarely racemose and leafless. Natives of wet rocks, or 

 trunks of trees, principally in tropical countries. We have 

 only one species, which is extremely rare, and till lately 

 has been greatly misunderstood. 



1. T. brevisetum. Short-styled Bristle-fern. 



Frond thrice pinnatifid, lobed, smooth ; segments linear, 

 entire. Stalk winged. Covers oblong. Common re- 

 ceptacles at first but slightly prominent. 



T. brevisetum. Br. in Ait. Hort. Kew. ed. 2. v. 5. 529. Sm. Comp. 

 - ed. 4. 1 74. 



T. europseum. Sm. in Rees's Cycl. v. 36, 



T. alatum. Hook. Lond. t. 53. 



