87 



point serrate-acuminate ; segments \— § in. 1. from the sharp sinus, 3-4 

 li. b. oblong, rounded, horizontal, close, crenato-serrate ; veins pinnate, 

 branches simple or once forked, the lowest opposite pair excurrent above 

 the sinus, sori copious, extending § up the segment, generally only 

 the lowest double; involucres narrow. — Plum. Fil. t. 18 and 19. Dipla- 

 zium, Liebm. A. crenulatvm, Baker. 



a. Yar. grammatoides, Fee. — Stipites and fronds taller, stronger, 

 pinnae more distant, and fully pinnate at the base (only the base), with 

 an open soace between the segments, which are crenulate-serrate or 

 slightly, lobateatthe base. — Diplazhtm grammatoides, Fee Fil. Ant. t. 11. 



b. Var. bipinnatisectum, Grr. — Fronds ample, If— If ft. w., pinnae 

 f-1 ft. 1. M-4 in. w. those of the lower half or more of the frond fully 

 pinnate their greater length ; pinnulae 1-J-lf in. 1. ^— § in. w. the point 

 acute, entire, within cut into shallow lobes in which the veins are pin- 

 nate with curved simple branches. — Grr. Fl. B. W. I I. p. 686. 



c. Var. expansum, Pinnae f-1 ft. 1. 2|-4 in. w,, pinnulae with their 

 own width more or less between them, l|-2 in. 1. J-^ in. w. tapering 

 from the base outwards, very shallowly cut within into broadly rounded 

 lobes ; veins impressed on the upper rather glossy surface ; sori very 

 copious, quite covering the surface. — A. expansum, Willd. 



d. Yar. tripinnatifidum, Jenm. — Fronds ample, pinnae 1 ft. 1. 4 in. w. 

 oblique (not horizontal), pinnulae 2-2| in. 1. J-| in. w . base truncate, 

 lower not quite sessile, cut J— § toward the midrib into close, straight, 

 oblong lobes, which are subangular forming rather a point at the an- 

 terior corner. 



Frequent in moist woods and forests from the vallies of the lower hills 

 up to 3,000 ft. alt. or higher. The type, which is uniformly strictly bi- 

 pinnatifid only, the segments being nowhere entirely separated, is com- 

 mon in the Eastern parishes at the lower elevations ; so also is the first 

 variety, a stronger, taller plant, which is fully bipinnate, the complete 

 separation of the segments being confined however to the base of the 

 lower pinnae only, the upper not sh >wing it ; in the next variety, which 

 is again larger, the lower pinnae are fully pinnate from half to two- 

 thirds their length, and the larger pinnules are slightly lobate ; in the 

 other varieties, c and d, which are found at the higher elevations, the 

 fronds are still larger, and uniformly tripinnatifid in the lower half or 

 two-thirds These varieties can hardly be distinguished from the smaller 

 states of radicans, except by the upper third or fourth of the frond, 

 which in the type and all the varieties alike is indistinguishable, being 

 quite different to the same portion of the fronds of that species. The 

 species was founded by Linnaeus on Plumier's figures quoted above, 

 which represent the type, and are immistakable, though somewhat arti- 

 ficially drawn. 



45. A. Klotzschii, Mett. — Rootstock stout, erect, the crown clothed 

 with lanceolate brown scales, stipites caespitose, erect, f-lj ft. 1. chan- 

 nelled, brown, puberulous, the dark base clothed with deciduous palea ; 

 rachis similar ; fronds bipinnate, obloDg-lanceolate, not reduced at the 

 base, the pinnatifid serrate apex acuminate, l-J-3 ft. 1. f-1 ft. w. her- 

 baceo-chartaceous, dark clear green and nearly naked above, paler be- 

 neath and glandulose- pubescent, the vestiture rusty at maturity, pinnae 

 horizontal, lax throughout, the lower distant, stipitate or petiolate, the 

 upper more or less apart and sessile, pinnate in the inner half or third, 



