110 _ 
of larger lobes pinnate, not reaching the edge; lateral veins simple or furcate with 
a short soriferous branch that sometimes does not protrude beyond the sorus. Sori 
rather large, indusiate. Indusium_ subpeltate, rotundato-reniform, subpersistent, 
glabrous. 
The description shows that D. Triane in several characters differs greatly from 
other species of § Polystichopsis, and it is with doubt I place it here. It is, in pro- 
portion to its size, less divided than any other species of the subgenus, and may 
be easily known by its not very deeply cut secondary pinne. In texture, colour it 
has some resemblance to D. ochropteroides and D. macrostegia, and its whole poly- 
stichoid habit and its apparently peltate indusium seem to indicate that its proper 
position must be here. An essential difference from all species of § Polystichopsis 
is, however, the shape of the lamina and the basal pinne, which are not deltoid 
but broadly lanceolate, broadest below the middle. In all species of § Polystichopsis 
the basal pinne are much the largest and their lower basal pinnula equally much. 
larger than the following ones; in D. Triane lamina and basal pinnz are narrower 
towards base. This character together with others, f. inst. venation, shape of lobes, 
points towards Stigmatopteris § Peltochlaena, and it is possible, that the species really 
is a member of that group, related to D. subobliquata. . 
358. Dryopteris macrostegia (Hook.) O. Ktze. Rev. Gen. Pl. 2: 813. 1891 ; 
G. Chr."Thd. 276: : 
Syn. Nephrodium macrostegium Hook. sp. 4: 148. 1862: Bak. Fl. Bras. 12: 486: 
_  Jenm. W. Ind. and Guiana Ferns 226. 
Type from Brazil, ad Rio Uaupés leg. Spruce nr. 2245 ‘(Kew !). 
Closely related to D. ochropteroides, agreeing with it in size, cutting, coriaceous 
texture, structure of scales of rhizome and stipe and large, subpersistent indusia, 
but it differs by its perfectly glabrous leaf, even the channels of the rachises above 
are destitute of hairs; lamina scarcely more than 4-pinnatifid, glossy above, ultimate 
segments obtuse. — It is not unlike some forms of D. amplissima, which species, 
however, always has paleaceous rachis. It so closely resembles D. aristata (Forst.) of 
the Old World, that one might be inclined to believe that it is a form of that 
widely distributed species; still D. aristata has fibrils on the ribs and mucronate teeth. 
Brazil: Rio Negro, prope Panuré ad Rio Uaupés, Spruce nr. 2545 (B, H, L, RB, W). — Amazonas, 
Rio Igana, Tu. Kocu nr. 66 (B). — Sine loco, Graziou nr. 12377 (B, H, W). 
Baker (FI. Bras. 486) also refers hereto a specimen from Br. Guiana, Roraima, Appun nr. 959. 
. 359. Dryopteris amplissima (Presl) O. Ktze. Rey. Gen. Pl. 2: 812. 1891; 
: C. Chr. Ind. 251. 
Syn. Polystichum amplissimum Pr. Tent. 84. 1836 (nomen); Epim. 58.. 1849. 
Aspidium amplissimum Mett. Aspid. 68 nr. 160, 1858. 4 
Soe 
