168 116 
30—40 cm broad), glabrous leaf-tissue and less pubescent ribs; keel inconspicuous 
or absent, but then a broad, cartilaginous membrane is seen between the basal 
veins. Sori medial, indusium glabrous or finely pubescent. 
Having not seen two speci- 
mens, which are quite identical, and 
not being able of distinguishing 
the forms from JD. Leprieurii by 
several characters, I prefer to refer 
all the specimens hereto, although 
it is very probable that at least 
some of them belong to a distinct 
species. 
Brazil: Matto Grosso, Santa Anna da Cha- 
pada, Marwr #/s 1902 (Rg. — very 
beautiful and large specimens with 
very acuminate pinnz) — Minas 
Geraes: Lagoa Santa, WARMING (H). 
Bolivia: Mapiri, RusBv nr. 426 (CC, thin 
leaved; sori supramedial). 
Peru: St. Gavan, LECHLER nr. 2468 (B). 
var. minor Hieron. Hedwigia 
46: 328. 1907. . 
Ecuador, in valle Pastaza, 
Stübel nr. 965 (B). 
184. Dryopteris praetervisa 
(Kuhn) O. Ktze. Rev. 2: 813. 1891; 
C. Chr. Ind. 285. — Fig. 21b. 
Syn. Aspidium praetervisum Kuhn, 

Fig. 21. a. D. densiloba C. Chr.; b. D. praetervisa 
(Kuhn) O. Ktze.; c. D. Leprieurii (Hook.) O. Ktze.; " Le 
all from the type-specimen. Pinnz >< 4/5, Linnaea 36: 111. 1869. 
segments >< 1!ls. Nephrodium praetervisum Bak. 
Syn. Fil. 495. 1874. 
Type from Venezuela, Tovar, FENDLER nr. 371 (Kew !). 
A critical species and perhaps a variety of D. Leprieurii. It differs from that 
species by the perfectly glabrous leaf-tissue, the coste and costule only being 
sparsely setose by short hairs; rachis rather densely but shortly pubescent. Veins 
10—12-jugate, much raised above. Keel distinct beneath but not reaching the costa, 
Sori supramedial, sometimes close to the margin, in the only specimen seen con- 
fined to the lower two anterior veins and to two or three upper veins at the apex. 
of the segment. — Lamina firm, papyraceous, glossy above, very gradually narrowed 
upwards into a long-acuminated apex. This last character is perhaps the most 
marked one. Aérophores distinct. 
