CRYPTOGAMIA— FILICES. Osmunda. 313 



branched, smooth, or hioinetinies downy, with soHtary 

 ribs, wiry stalks, and creeping slender routs. Covers 

 solitary at the ends of some of the inferior and shorter 

 segments, terminating the rib, entire or serrated. Na- 

 tives of wet mossy rocks, or trunks of trees, most plen- 

 tiful in tropical countries. One species only is of Eu- 

 ropoean growth. 



1. H. tunbridgense. Tunbridge Filmy-fern. 



Frond doubly jHunatifid, smooth. Segments and covers 

 sharply toothed. Fructifications solitary, from the lower- 

 most of the secondary segments, at the upper edge. 



H. tunbridgense. Fl. Br. 1141. Engl Dot. v. 3. t. IG2. mild. Sp. 

 ri.v.b. 520. Srjm.Sijn. 195. Hook. Lond. t.7\. Scot. p. 2. 157. 



Trichomanes tunbridgense. Linn. Sp. PL 1561. Huds.AOi. With. 

 78]. nolt. Fit. 5S. t. 31. FL Dan. t. 954. 



Adiantum petrseum perpusillum anglicum, foliis bifidis vel trifidis, 

 Raii Sy7i. ed.2. 47. ed. 3. 123. HisL v. 3. 77. 



A. radicosum humi-sparsum ; eterectius. Pluk. Jlmag. 10. Phjt. 

 t.3.f.5,6. 



Darea tunbrigensis minor. Petiv. Mus. cent. 8. n. 762. 



Muscus palustris anglicus, foliis integris, bifidis et trifidis, sparsim 

 nascentibus, Moris, v. 3. 627. sect. \5.t. 7 -f. 50. 



M. montanus italicus, adianthi foliis. Docc. Mus.2A. t. 2.f. I. 



Amongst moss, in watery shady places, in the rocky or mountain- 

 ous parts of Great Britain. 



Perennial. May, June. 



The roots are long, slender, smooth, wiry, creeping horizontally. 

 Fronds scattered, erect, about one-third the size of the Tricho- 

 manes last described, and like that, smooth, of a filmy pellucid 

 texture, curling up as they dry ; the stalk wiry, without any 

 wing or border ; segments linear, obtuse, single-ribbed, sharply 

 toothed, especially in their upper part. Covers of two erect, 

 converging, nearly orbicular, equal leaves, toothed in like man- 

 ner, solitary at the base of the primary divisions, on the upper 

 edge, with more or less of a stalk. Dr. Hooker's figures and 

 history of this and the foregoing are peculiarly excellent. 

 Mr. Menzies brought the present plant from the Cape of Good 

 Hope ; and it grows in most parts of Europe, from Norway to 

 Italy, but has not been observed in Germany or Switzerland. 



* * Capsules, or seeds, wiihout auy distinct elastic ring. 

 Habit various. 



474. OSMUNDA. Osmund-royal. 



Linn. Gen. 559. Jnss. 15. FL Br. 1 107. Sw.Syn. FiL 160. Willd. 

 Sp.Pl.v. 5. 96. Br. Prodi. [63. Tourn.t. 324. Lam. t. 865./. 2. 



