674 UnNpDERWOOD: FERNS OF THE PHILIPPINES 
Tribe 3. Vittarieae 
The three Philippine genera of this tribe may be characterized 
as follows : 
1. Leaves narrow, grass-like ; sporangia in one or more continuous lines. 2. 
Leaves broader ; sporangia in broken lines often following the anastomosing of the 
veins. ANTROPHYUM, 
2. Sporangial line medial, single. MONOGRAMMA. 
Sporangial lines double, marginal or submarginal. VITTARIA. 
Eight nominal species of Antrophyum, six of Vittaria and one 
Monogramma have been reported from the Philippines. All are 
epiphytic in habit. 
Tribe 4. Polypodieae 
Two distinct series are represented in this tribe which normally 
includes the species lacking an indusium. In one series the sori 
are linear, in the other they are normally round ranging to oval. 
The genera may be distinguished as follows : 
I. Sori linear, parallel to the midrib or margin. * 
Sori linear, oblique to the midrib ; veins anastomosing. SELLIGUEA. 
Sori round or oval. 5 
2. Leaves simple. oh 
Leaves pinnate. 6 
3. Leaves dimorphous, the sporophyls narrow. DRYMOGLOSSUM. 
Leaves uniform, the apex contracted and bearing the sporangia. BELVISIA.* 
TAENITIS. 
4. Sori median, between midrib and margin. 
Sori finally covering the entire under surface. PLATYTAENIA. 
5. Under surface of leaf densely covered with stellate hairs, CycLoPHoRUs.f 
Under surface smooth or barely scaly, : 
" 6. Veins free. POLYPODIUM: 
Veins anastomosing. Ue 
7. Basal leaves unlike the sporophyls, forming a nest-like cluster at the base of the 
plant. DRYNARI™ 
Leaves normally uniform. & 
8. Sori dorsal, confined to the veins. 3% 
Sori dorsal, extending to the parenchyma. fe 
Sori terminal on the veins and marginal on the leaf; sporophyls contracted ; root- 
stocks much swollen. LECANOPTERIS. 
g. Leaves pinnate. PHOTINOPTERE: 
DRYOsTACHYUM. 
Leaves pinnatifid with decurrent segments. 
* Belvisia Mirbel, antedates Hymenolepis Kaulf. adopted in Dre natiirlichen 
Phlanzenfamilien for this genus. 
+ Gyelophorus Desv. was perfectly well characterized and typified, and there is 7° 
_ excuse for using the later iphodolus Kaulf. 
