Descriptions of the Species. 
129 
7 1. A. erectum. Frond one-half to two feet long, three-quarters to three 
inches broad ; pinnae entire or pinnate in the different varieties. Rachis 
edged with green, glabrous. Sori on both sides the mid -rib. 
Vars. Cl. lunulatum. Pinnae one-half to three-quarter-inch long, crenate, 
blunt, rhomboidal. Frond two to three feet long, proliferous. 
/ 3 . minor. Pinnae as in var. lunulatum, but smaller. Frond six to 
nine inches high, proliferous. 
7. erectum. Pinnae one inch long, half-inch broad, acute, deeply 
toothed. Frond two to three feet long, proliferous. 
d. brachyotus. Pinnae one and a half inches long, half-inch broad, 
bluntly toothed, obtuse ; frond two feet long, two inches 
broad. 
£. zeyheri. Pinnae obtuse, cut below to near the mid-rib into 
rounded toothed lobes, deeply toothed above, not proliferous. 
£. lobatum. Pinnae fully pinnate, with cuneate, toothed, or lobed 
pinnules. Frond one to two feet long, two to four inches 
broad, not proliferous. 
72. A. varians. Frond three to eight inches long, one and a half to two 
inches broad, two-pinnate, with flabellate, toothed, rounded pinnules. 
Sori in the pinnules. 
73. A. Gueinzianum. Frond nine inches long, one and a half inches 
broad ; pinnae rhomboidal, cut away below, three-quarter-inch long ; 
cut to a widely winged mid-rib into several flabellate, bifid lobes. Sori 
sub-parallel with the mid-rib. 
+++ Frond pinnate (or two-pinnate in vars. of 74 and 78), lanceolate or 
ovate lanceolate, more than three inches broad. 
74. A. protensum. Frond two to five feet long, two to four inches broad; 
pinnae numerous, cut halfway to the mid-rib into two-toothed blunt 
lobes. Rachis and mid-rib pubescent. 
Var. bi-pinnatifidum. Pinnae cut to the mid-rib into overlapping, 
rounded, serrate pinnules ; plant stronger. 
75. A. anisophyllum. Frond herbaceous ; pinnae twelve to twenty pairs, 
two to four inches long, one-half to one inch broad, bluntly toothed 
throughout. Sori oblong, swollen, oblique, reaching halfway to the 
edge. 
76. A. prionitis. Frond herbaceous ; pinnae eight to fourteen pairs, 
stalked, six inches long, one to one and a half inches broad, sharply 
toothed throughout. Sori linear, reaching to near the edge. 
K 
