NoveMBer 15, 1910] THE Ferns or Mount Apo 811 
On wet, mossy rocks, alt. 1150 m., No. 10784. ‘‘Sayop.” 
Tayabas province, Luzon. 
Dryopteris diversiloba (Pr.) Christ in P.J.8.2,C (1907) 
199. 
On moist, mossy soil in forests, alt. 1050 m., No. 10780. 
‘“‘Sayop.” This form is Goniopteris asymmetrica Fée. 
Fairly common in Mindanao, and collected once each 
in Negros and La Laguna province, Luzon, near the Pacific 
coast. 
POLYSTICHUM Roth. 
Polystichum aculeatum (L.) Schott. 
Creeping on tree trunks near the ground, in dense 
woods, Mt. Calelan, alt. 1200 m., No. 11802. ‘‘Dumagindo.” 
The same form has been collected on Mt. Apo by Williams 
2511, and myself, and at Camp Keithley by Mrs. Clemens. It 
is not P. horizontale Presl, nor any other form known to me. 
Polystichum aristatum (Forst.) Presl. 
Mt. Calelan, No. 11614." Several Philippine species 
are confused under P. aristatum and P. carvifolium. 
Natal to Japan and Polynesia. 
Polystichum amabile (Bl.) J. Sm. 
Mixed with the preceding. Also collected on Mt. Apo, 
alt. 1800 m., Copeland 1114. 
Throughout the Philippines. 
Malaya to India and Japan. 
DIDYMOCHLAENA Desv. 
Didymochlaena truncatula (Swtz.) J. Sm. 
In dense forests, alt. 1200 m., No. 10917. "''Libagod."' 
Northward to Mt. Banajao. 
E Tropics. 
