184 34. BLECHNUM, § EUBLECIINUM. 



rachis and both surfaces naked ; veins inconspicuous ; sori in a short line close 

 to the midrib, bften on one side only.— i». Sp. S. p. 45. B. polypodioides, Kee. 

 S Melt, non Raddi. 



Hab. Tropical Amferioa from Panama and N. Granada to Brazil and Peru. — A more 

 ^tender and narrower plant than B. miilaierale, with even the lowest pinnse connected and 

 much less copious sori. 



5. B. unilaterale, WiWd. ; caud. elongated, densely clothed at the crown with 

 liileatpale--br6WSTcales ; St. slender, erect, 1-4 in. 1., slightly scaly below ; fr. lan- 

 ceolate,' 6-12 in. 1., lJ-2 in. br. ; pinnce numerous, spreading horizontally, linear, 

 j-l in. 1., the central ones J-f in. br., the point usually mucronate, the edge 

 entire or nearly so, the lower part dilated to a broad base, the lower ones 

 broadpr, blunter, and short ; texture herbaceous, both surfaces and rachis naked 

 or slightly hairy ; veins inconspicuous ; sori in a line close to the midrib. — 

 B. polypodioides, Baddi. Hk. Sp. 3. p. 46. 



Hab. Tropical America from Mexico, and the W. Indies southward to Peru and 

 S. Brazil. — This comes very near the small forms of B. ocHdentale, and we cannot, from 

 the description alone, distinguish B, tricmgulare, Link. 



4. B. cartilaffineum, Swartz ; caud. oblique, densely clothed at the crown with 

 buckish llbrillose scales ; St. strong, erect, 4-6 in. 1., scaly and muricated in the 

 lower part ; fr. ovate-oblong, 1-2 ft. 1., 6-9 in. br. ; pinnae numerous, erecto- 

 patent, linear, 4-6 in. 1., J-^ in. br., narrowed gradually towards the point, the 

 margin finely toothed, dilated and connected at the base, the lower ones not con- 

 spicuously smaller than the others ; texture coriaceous ; rachis and both surfaces 

 naked ; veins fine ; sori in a broad line close to the midrib. — Hh. Sp. 2. p. 43. 



Hab. Temperate Australia. Very like B. nitidmn, from which it is best distinguished 

 by its muricated stipe. 



6. B. nitidum, Presl ; st. stout, erect, naked, 3-4 in. 1. ; Jr. oblong-lanceolate, 

 1 ft. or more 1., 4-6 in. br. ; pinnce numerous, erecto-patent, subfalcate, linear, 

 3-4 in. I., J-f in. br., narrowed gradually towards the point, dilated and con- 

 nected at the base, the edge undulato-dentate, the lower ones linear acute and 

 not much smaller than the rest ; texture coriaceous, both surfaces and rachis 

 naked ; veins fine ; sori in a continuous line close to the midrib ; invol. con- 

 spicuous.— ITA. Sp. S.p. 44. t. 66. 



Hab. S. Brazil, Philippines, Marianne Islands, Isle of Gaudalcomar and Mishmee, 

 N. Hindostan. — Near B. brasiliense, but a, smaller plant, terminating abruptly below, 

 and the involucre more conspicuous. In some of the specimens {var, corUractum, Hook.) 

 the pinnse are contracted and the edge is much undulated. 



6. B. brasiliense, Desv. ; caud. erect, stout, subarborescent, 1 ft. or more 1., 

 densely clothed at the crown with dark-brown fibrillose scales ; st. short, stout, 

 densely scaly ; fr, oblong-lanceolate, 2-3 ft. I., 1 ft. or more br., narrowing 

 downwards very gradually ; pinnce close, erecto-patent, linear, 4-6 in. I., ^ in. hi\, 

 narrowed gradually towards the point, very finely toothed, connected at the 

 base, the lower ones short and blunt ; texture coriaceous, both surfaces naked ; 

 veins fine ; rachis naked ; sori in a continuous line close to the midrib ; invol. 

 narrow.— .ffi. Sp. 3. p. 43.' J, 167. B. corcovadense, Raddi. B. validum, 

 Fie. 



Hab. Brazil and Peru. 



