ANTROPHYUM. 



409 



A. subfalcatum — sub-fal-ca'-tum (nearly sickle-shaped), Brackenridge. 



A stove species, native of Borneo, Fiji, and the Samoan Islands, also 

 known as A. Brookei. Its fronds are 6in. to 12in. long, \m. to Jin. broad, 

 and terminate in a sharp point, but are very gradually narrowed to the base 

 on their lower half, which is also provided with a somewhat indistinct midrib. 

 The areolae are vertical, and disposed about two on each side of the midrib, 

 and are several times longer than broad. The sori (spore masses) are 

 moderately immersed (embedded) in the texture of the fronds, and hardly 

 unite ; they are disposed in two or four long, interrupted lines. — Hooker, 

 Species Filicum, v., p. 175. 



A. Sllbsessile — sub-ses'-sil-e (nearly stalkless), Kunze. 



This stove species, whose habitat extends from Cuba and Guatemala to 

 Peru, produces fronds Gin. to 12in. long, lin. to ljin. broad, of a firm 

 texture, and with a conspicuously-raised midrib, distinct from the base to the 

 extremity. They are broadest one- third of the way down, and are narrowed 

 gradually to the base and to the summit, which is sharp-pointed. The areola 

 shown on their surface are oblique, and about twice as long as broad. The 

 sori (spore masses) are often forked, and nearly superficial. — Hooker, Species 

 Filicum, v., p. 171. 



ARTHROPTERIS — Arth-rop'-ter-is. See Nephrodium and 

 Nephrolepis. 



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