DESCRIPTIONS OF THE SPECIES 
137 
73. A. adiantum-nigrum. Frond deltoid, two to three-pinnate, 
glabrous, three to nine inches long, two to six inches broad ; lowest 
pinnae longest. Rhizome short, stout, not creeping. Pinnules 
rounded, toothed. 
Var. / 3 . obtusum. More cut; pinnules narrow, spathulate, and 
lobed, with three to five sharp, equal teeth, pointing inward. 
74. A. solidum. Frond deltoid, three to four-pinnate, six to fifteen 
inches long, four to seven inches broad, cut throughout into linear 
or narrowly cuneate lobes, with three to five sharp, divergent teeth. 
75. A. cuneatum. Rhizome creeping; fronds glabrous, two-pinnate, 
four to eight inches long, three to four inches broad ; pinnae and 
pinnules rounded ; lowest pinnae generally barren, not longer than 
those above them: Rachis almost naked. 
Var. / 3 . splendens. Pinnae and pinnules sharp pointed, fronds 
one to two and a half feet high, nine inches broad, three- 
pinnatifid ; texture less leathery. 
Var. y. augustatum. Frond narrow and less cut; upper pinnae 
cuneate, or cuneate three-lobed ; lower pinnatifid into about 
three cuneate pinnules. Rachis slightly paleaceous. 
76. A. praemorsum. Frond two-pinnate, coriaceous, two to four 
inches broad, one to one and a half feet long ; pinnae and pinnules 
pointed, with scattered, woolly scales, on one or both sides. Rachis 
and stipe fibrillose. 
Var. / 3 . tripinnatum. Frond larger and more cut, less coriaceous, 
and- less paleaceous. Stipe and rachis fibrillose. 
77. A. abyssinicum , var. cicutarium. Frond six to eighteen inches 
long, four to six inches broad, three-pinnate. Segments linear, 
rachis naked. 
§§ Segments narrow; sori marginal or submarginal (Darea, Juss.V. 
(71. A. gemmiferum, var. y. discolor .) 
78. A. Dregeaiium. Frond lanceolate, two-pinnate, six to fifteen 
inches long, one to one and a half inches broad. Pinnae one-half 
to three-quarter inches long, half inch broad, with five to eight 
linear pinnules. 
79. A. auriculahim. Frond lanceolate, two-pinnate, one to two 
feet long, three to six inches broad ; pinnae one and a half to 
two inches long, one-half to three-quarter inch broad, herbaceous. 
Segments linear, blunt, one line broad; sori submarginal. 
(A. fiaccidum. Frond two-pinnate, coriaceous, often proliferous. 
Pinnae alternate, pinnules short pointed, simple, or lower one 
forked or pinnatifid.) 
