UNDERWOOD: FERNS OF THE PHILIPPINES 675 
1o. Areolae regular, with a single free included veinlet which is directed outward. 
GONIOPHLEBIUM. * 
Areolae small, irregular, with free veinlets spreading in various directions. 
PHYMATODEs.* 
Selliguea, joined with Gymnogramme in Synopsis Filicum, and 
united with Polypodium in Die natiirlichen Pflanzenfamilien, is rep- 
resented by eight species. Dyrymoglossum, Dryostachyum, Taenitis 
and Fatytaenia have each a single representative in the Philippine 
flora, the last two in fact being monotypic genera. 
Belvisia, included under Acrostichum in Synopsis Filicum, has 
two representatives. The remaining genera recognized above form 
a part of the unnatural genus Polypodium, as recognized in Synopsis 
Filicum. Lecanopteris and Photinopteris are represented each by a 
single species ; Cyclophorus has sixteen nominal species, though not 
all reported have been taken up by Giesenhagen in his admirable 
monograph of the genus. This, however, is not an exhaustive treat- 
ment from a strictly taxonomic standpoint, containing some new 
things not properly correlated with that which is old. Dryuaria 
similarly has ten nominal species, but the genus has never had a 
careful revision and all the species require very careful study afield. 
Gontophlebium has four species including the peculiar simple-leaved 
Polypodium nummularium on which Presl based his genus Cryp- 
sinus perhaps with good reason. Polypodium and Phymatodes 
have the largest representation in the islands, the former with nine- 
teen nominal species and the latter with thirty-eight. It is prob- 
able that both these genera will receive extensive additions, partic- 
ularly among the smaller epiphytic species that from their habitat 
longer evade detection. Such at least has been the experience in 
other tropical regions. Taken as a whole this tribe is one of the 
largest as well as one of the most characteristic groups of the 
Philippine fern flora. 
Tribe 5. FPterideae 
Maidenhair ferns are apparently less common in the Philippines 
than in most tropical regions and the entire tribe to which they 
belong with the exception of a single genus has a comparatively 
* The above synopsis follows exactly the lines noted in Die natiirlichen Pflanzen- 
Samilien, except that Goniophiebium and Phymatodes are there included under Poly- 
podium, where in our judgment less attention has been given to venation than elsewhere 
in the work, 
