33 85 
1) The group of D. submarginalis including the species 29—40, closely allied 
species with differently shaped but never bullate scales; stipe at base as a rule 
with a dense mass of large scales. Veins reaching the margin. 
2) The groups of D. Lindeni, including the species 44—46, smaller Central- 
American species with very characteristic bullate scales; base of stipe scaly but 
not with a dense tuft of large scales; veins often furcate, not reaching the margin. 
The species 41—42, D. nigrovenia and D. Tonduzii are intermediate between the 
first and the second group. 
3) The group of D. platyloba; hereto the species 48—52, characterized by 
broad, obtuse segments with normally furcate veins, which do not reach the 
margin. The lamina is often finely pellucido-punctate; by this character as well 
as by venation the species of this group resemble Stigmatopteris, from which they 
differ by the non-serrated apex of the pinnz and by the presence of articulated 
hairs. In some of the species the articulated hairs are subulate, and very short, 
unicellular hairs are also found. To this group mainly decompound species belong; 
D. refulgens is an intermediate between the first and the third group. 
Key. 
1. Veins normally simple, still often forked in the basiscop enlarged segments of 
the lower pinne. 
2. Segments normally entire or faintly crenate or serrate; the basal pair of 
pinne scarcely enlarged. 
3. Pinne incised '/;—?/s of the way to the costa; the lower 2—5 veins run 
to the sinus. 
4. Pinnz incised '/;—'/2 into broad, obtuse segments; the lower 4—5 veins 
(2 pairs) run to the sinus. 
5. Pinne 10—15 cm long by 2!/»—3 em broad, abruptly and shortly 
acuminate; scales few, dark, toothed. Brazilian species 
29. D. pedicellata (Christ) C. Chr. 
5. Pinne 20cm long by 4 cm broad, long acuminate; scales numerous, 
entire, reddish. Andes and Guiana... 30. D. refulgens (Kl.) C. Chr. 
4. Pinne incised !/»—?/5; 2 basal veins run to the sinus. Scales very few . 
and small, dark. Lamina generally with a distinct terminal pinna. 
31. D. alsophilacea (Kze.) O. Ktze. 
3. Pinna incised to a narrow wing to the costa or larger ones of some 
species fully pinnate in their basal part. 
4. Scales of rachis dark and rigid, not thin, hairlike and not broad and 
reddish. Indusium persistent. 
D. K. D. Vidensk, Selsk Skr., 7. Reekke, naturvidensk. og mathem. Afd. X. 2. 12 
