47. FADYENIA. 303 



(hi part). — /3, 0. JVelwitsc/ihy Baker ; 5^00^5 weaker, wide-trailing ; scales linear- 

 subulate, squarrose. 



Ilab. Natal, Mascaren Isles, Seychelles, Guinea Coast ; (3, Angola, Dr. Welwilsch. — 

 The typical plant is about midway in mode of growth between species 1 and 4 ; /3 has 

 the trailing shoots and spreading scales of nodosa, but in other respects agrees with 

 this. 



4. O. nodosa, Presl ; shoots trailing horizontally, densely clothed with linear- 

 subulate spreading scales ; st. scattered, 2-G in. 1., often ebeneous, articulated 

 not far from the base ; fr. G-12 in. 1., 1^-2^ in. br., the apex acuminate, the edge 

 entire ; texture subcoriaceous, both sides glossy ; sori scattered, placed nearly 

 all in the inner half of the frond ; invol. \ lin. br. — Hk. Sp. 4. p. 157. 



Hab. West Indies and Guiana. — Distinguished from all the other species by its trailing 

 shoots, satiny gloss, and copious irregularly-scattered sori. 



6. O. WaUichii, Hk. ; shoots trailing horizontally, the scales fibrillose, 

 spreading, ferruginous ; st. close or scattered, \-2 in. 1., jointed close to the 

 base ; //•. 6-12 in. 1., |-H in. br., the apex acuminate ; texture papyraceo- 

 herbaceous or subcoriaceous ; rachis naked or scaly ; both sides naked ; sori in 

 single rows close to the midrib ; invol. \ lin. br., ciliated, opening towards the 

 edge.— /?/l-. Sp. 4. p. 153. 



Hab. N. India, up to 7,000 ft. 



6. O. Cumingii, J. Sm. ; shoots trailing horizontally, clothed with ad pressed 

 linear scales ; st. close or scattered, 2-8 in. 1., articulated near tlie base ; fr, 12-18 

 in. 1., 1^ in. hr., narrowed gradually towards both ends ; texture herbaceous ; 

 rachis and both sides slightly pubescent ; sori in two irregular rows near, but 

 not close to, the midrib ; invol. firm, oblique. — Hk. Sp. 4. p. 155. O. chinensis, 

 Hance. — /3, O. Sibbaldi, Grev. ; texture thinner ; surfaces more hairy ; sori in 

 very irregular wavy lines not so near the midrib. — Ann. Nat. Hist. 2 ser. 1. 

 p. 327. 



Hab. Canton, Assam, Philippines, Neilgherries, and Malaya. — Var. long'ipes, Hk., 

 from ^louhiiein, has stems 4-.5 in 1., articulated near the middle. /3, Tahiti ; gathered 

 by Sibbald and Bidwell. Probably this occurs in Tropical Australia, as there are speci- 

 mens amongst Leichbardt's plants. 



Gen. 47. Fadyenia, Hook. 



Sori oblong^ in two series near the midrib, terminating free veinlets. Invol. 

 large, subrenitorm, attached by the centre, ft-ee ail round the edge. A single 

 West Indian species. Tab. V. f. 47. 



1. F. prolifera, Hk. ; fr. entire, dimorphous, the sterile ones f-1 in. br., 

 elongated and rooting at the apex, the fertile one ligulate, narrowed below, 

 G-9 in. 1., J-§ in. br. ; veins anastomosing copiously ; texture subcoriaceous ; j/ 

 son filling up nearly the whole space between midrib and edge. — Hk. Sp. 4. 

 p. IGO. Fil. Ex. t. 36. 



Hab. Cuba and Jamaica. 



