130 
The Ferns of South Africa. 
77. A. serra, var. Natalense. Frond coriaceous ; pinnae fifteen to twenty 
pairs, three to five inches long, one-half to three-quarter-inch broad, 
very much attenuated, cut halfway into toothed lobes. Sori close to the 
mid-rib, and almost parallel with it. 
78. A. gemmiferum. Frond coriaceous, simply pinnate : pinnae six to 
twelve pairs, four to six inches long, one to one and a quarter inches 
broad, pointed, entire or crenate, or bluntly toothed. Sori oblique, 
linear, reaching halfway to the edge. 
Var. /3. flexuosum. Pinnae cut halfway, or at the base more, into 
cuneate, flabellate, bluntly toothed, overlapping lobes. Sori 
irregular, or reaching the sinuses. 
Var. 7. discolor. Pinnae cut throughout to a widely margined mid- 
rib, into distant, cuneate, bifid, or flabellate pinnules. Sori 
marginal. 
+ttt Fronds tapering from a wide base, coriaceous, two to three-pinnate ; 
pinnules linear or cuneate ; venation sub-flabellate. 
79. A. Rawsoni. Frond two-pinnatifid, three inches long, one and a half 
inches broad, pinnules and upper pinnae roundly cuneate, crenate. Sori 
central on the pinnules, short. 
80. 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. j8. obtusum. More cut ; pinnules narrow, spathulate, and 
lobed, with three to five sharp, equal teeth, pointing inward. 
81. 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. 
82. 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. j8. splendens. Pinnae and pinnules sharp pointed, fronds one to 
two and a half feet high, nine inches broad, three pinnatifid ; 
texture less leathery. 
Var. 7. augustatum. Frond narrow and less cut ; upper pinnae 
cuneate, or cuneate three-lobed ; lower pinnatifid into about three 
cuneate pinnules. Rachis slightly paleaceous. 
