ALSO PHI LA. 



355 



denticulate (toothed), blunt segments scarcely ^in. broad. The very minute 

 sori (spore masses) are situated just above the midrib of the fertile 

 segments. — Hooker, Synopsis Filicum y ~p. 458. 



A. ferox — fer'-ox (fierce, in reference to the thorny character of the plant). 

 Synonymous with A. aculeata. 



A. frigida — fri'-gid-a (cold), Karsten. 



This greenhouse species, which was discovered by Karsten at 15,300ft. 

 elevation on the Andes of Bogota, forms but a very short stem or trunk. 

 Its fronds, tripinnate (three times divided to the midrib) and of a leathery 

 texture, are borne on stipes (stalks) which are sparingly clothed with light 

 hairs of a woolly nature and conspicuously muricated (rendered rough by 

 the presence of short, hard, tubercular excrescences), especially at their base. 

 The pinnaB (leaflets), which from a broad base grow gradually narrower, and 

 terminate in a long, tapering point, are furnished with pinnules (leafits) Jin. 

 long, oblong, more or less adnate (attached on their whole width) at their 

 base, and densely covered with small scales underneath. The lobes are sickle- 

 shaped, obtuse, and notched, and are separated from each other by a very 

 narrow sinus (depression) : their margins are revolute (rolled back). The 

 sori (spore masses) are disposed on the forking of the middle vein of the 

 fertile lobes. — Hooker, Synopsis Filicum, p. 38. 



A. Gardner! — G-ard'-ner-i (Gardner's). Synonymous with A. paleolata. 



A. gibbosa — gib-bo'-sa (swollen), Klotzsch. 



A stove species, native of British Guiana and East Peru. Its large 

 fronds are tripinnatifid (divided three times half-way down to the midrib), 

 and the spear-shaped pinna3 (leaflets) are ljft. to 2ft. long. The pinnules 

 (leafits) are borne on long stalks, articulated (jointed) at the base, strap- 

 shaped, 4in. to 5in. long and lin. broad, and cut down to a broad wing. 

 The segments (sub-divisions) thus produced are of a rigidly leathery texture 

 and dull green colour, falcate (sickle-shaped), finely dented, and set close 

 together. The small and numerous sori (spore masses) are disposed on the 

 midvein of the fertile segments. — Hooker, Synopsis Filiciim, p. 457. 



A. gigantea — gig-ant-e'-a (gigantic). Synonymous with A. glabra. 



