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a sll 
UNDERWOOD: FERNS OF THE PHILIPPINES 677 
2. Indusium wanting; plants climbing ; leaves dimorphous. STENOCHLAENA, 
Indusium present ; plants mostly terrestrial. 3- 
3. Leaves uniform. 4. 
Leaves dimorphous ; sori intramarginal ; caudex sometimes arborescent. 
STEGANIA,* 
4. Veins anastomosing between the sori and the margin. Woopwarpia. 
Veins free between the sori and the margin. BLECHNUM, 
5- Indusium wanting. 6. 
Indusium present. 8. 
6. Veins free. 7- 
Veins anastomosing. HEMIONITIS,t 
7+ Sori forked, with the forking of the veins. CONIOGRAMME. } 
Sori simple, linear. SYNGRAMMA. } 
8. Veins free. 9. 
Veins anastomosing, sie 
9. Sori confined to one side of a vein, linear or slightly curved. ASPLENIUM.% 
Sori curved or horseshoe- -shaped, crossing to both sides of the veins. 
ATHYRIUM. 7 
Sori double, the indusia opening on both sides of some of the veins. 
DiPLAzIUM. 
Sori rising from a special receptacle midway between veins; indusia attached to 
the veins, opening toward each other. TRIPHLEBIA. 
10. Veins connected only at their apices; leaves simple, densely clustered. 
THAMNOPTERIS. || 
Veins forming regular areolae. CALLIPTERIS. © 
Woodwardia, Hemronitis and Coniogramme are each repre- 
sented in the Philippines by a single species, Triphlebia and Syn- 
ys Dich unites this with Babaua although under the name Zomaria the genus is 
held as distinct even in Synopsis Filicum. The name Struthiopteris must hold for the 
European and North American representative of the genus (.S. Sfecan?) and Lomaria 
had for its type a member of another genus, so must be replaced by Stegania Ry Br: it 
generic distinctness from the North Temperate representatives is maintained. 
+ Hemionitis is associated in Die natiirlichen Pfhlanzenfamilien with the Pterideae, 
with which it appears to have no near relationship ; it must either form a tribe by itself 
or be associated here with its nearest but not very close allies. 
t Coniogramme and Syngramma form a part of the heterogeneous Gymnogramme 
of Srnensts Filicum ; Diels associated them with the Pterideae, for which we can see 
no warrant, 
2 It is still an open question as to what we shall consider the generic types of these 
two genera; they are adopted here tentatively in their usually accepted sense. 
|| The ‘* bird’s nest fern’’ ; united with Asplenium by both Diels and Baker. 
{The earlier name for Anisogonium Presl. Diels unites it with the free-veined 
Diplazium and both are joined as sections of Asplenium in Synopsis Filicum. Allan- 
todia of Synopsis Filicum is also reported from the Philippines, but the name cannot 
hold for the species to which it is assigned and the genus is not clearly distinguished 
from Callipteris. 
