38. ASPLENIUM, EUASPLENIUM. 201 



emarginate, with a small bud in the open sinus, the edge slightly crenate, the 

 oase equal on both sides, rounded into a short stalk ; texture thinly herba- 

 ceous ; colour bright-green ; veins usually forked ; sori irregular, close, reaching 

 from the midrib nearly to the edge. Hk. 2nd Cent. F. t. 80. 



Hab. Guinea coast and Angola. 



58. A. mrens, Presl; st. 6-12 in. 1., rather slender, greyish, naked ; fr. 9-12 

 in. ]., 6-8 in. br., ovate, with a terminal pinna and -5 lateral ones on each side, 

 which are -l| in. apart at the base, the lowest only distinctly stalked, 3-4 

 in. 1., |-1 in. br., the point acuminate, the margin deeply crenato-dentate, the 

 base truncato-cuneate ; texture herbaceous ; colour bright-green ; rachis green, 

 subflaccid, naked ; veins distant ; sori reaching from the midrib to the edge. 



m. Sp. s. p. 101. 



Hab. Gorgona Island and Guyaquil, West Tropical America. Closely allied to 

 A. salicifolium and 



59. A. vulcanicum, Blume ; st. 6-9 in. 1., firm, erect, grey, naked ; fr. 1-2 

 ft. 1., 4-8 in. br., oblong-lanceolate, with a linear-terminal pinna, or gemmiferous 

 at the apex, and 6-12 lateral ones on each side, the lower ones distinctly 

 stalked, 4-6 in. 1., f-1 in. br., the point acuminated, the edge slightly crenato- 

 dentate, the base truncato-cuneate into a petiole sometimes -^ in. 1. ; rachis 

 naked ; texture herbaceous or subcoriaceous ; veins simple or forked ; sori very 

 regular and parallel, falling short of the edge ; invol. broad, pale. Hk. Sp. 3 

 p. 102. A. heterodon, Mett., Hk. Sp. 3. p. 107. 



Hab. Malay Islands. The Ceylonese A. Walkers, Hk. Sp. 3. p. 108. t. 163, does not 

 waites says that this last and A. Wighlianum. 



seem to be safely separable; and Mr. Tbwaites says that this last and A. Wighl 



pass into one another gradually. A. heterodon, Blume, is said to differ by its stouter 



habit, broader pinnae, and fewer sori. 



60. A. oligophyllum, Kaulf. ; st. tufted, 6-12 in. L, firm, erect, scaly below ; 

 fr. 1-2 ft. 1., 6-9 in. br., oblong, with a large terminal pinna and 3-8 erect-o- 

 patent lateral ones on each side, which are 6-8 in. 1., 1-1^ in. br., the point 

 acuminate, the edge obscurely sinuated, the base nearly equal, narrowed or 

 rounded on both sides into a short winged petiole, the upper ones de*current on 

 the rachis ; texture herbaceous ; veins faint, distant, usually once forked ; sori 

 not reaching the edge by a considerable space. Hk. Sp. 3. p. 107. 



Hab. Columbia and Brazil. 



B. Pinnae narrowed suddenly at tlie base on the upper side, the inner edge 

 nearly parallel with the main rachis, the lower side obliquely truncate. 

 Sp. 61-98. 



a. Group of A. erectuin. Texture of the frond herbaceous, the colour dark-green, 

 the veins clearly visible. Sp. 61-75. 



61. A. tenerum, Forst. ; st. tufted, firm, erect, greyish, naked, 4-6 in. I. ; 

 fr. 8-15 in. L, 3-4 in. br., oblong-lanceolate, with 10-20 stalked horizontal 

 pinncB on each side, which are 1-1 ^ in. L, ^-f in. br,, bluntly rounded at 

 the point, the edge deeply toothed throughout, the two sides unequal, the 

 upper one narrowed almost at a right angle, sometimes slightly auricled, 

 the lower one very obliquely truncate, lower pinnse deflexed ; texture herba- 

 ceous ; rachis compressed ; veins usually simple ; sori numerous, regular, 

 parallel, not reaching either edge or midrib. Hk. Sp. 3. p. 117- A. elongatum, 

 Sw. Hk. I. c. 



Hab. Ceylon, Malaya, Polynesia. A. Doreyi, Kze., seems to be a form of this with 

 2 c 



