OcroskR 30, 1908) PTERIDOPHYTES OF THE Horn or Negros 
Pantropic. 
Dryopteris luzonica Christ in Philip. Journ. Sei. 2 C (1907) 
196. 
On ledges or very steep slopes, alt. 600 m., No. 9865. 
Luzon. 
Dryopteris todayensis Christ. 
In fertile soil of herbaceous thickets, alt. 1350 m.,: No. 9845. 
This specimen is intermediate between the type from 
Mt. Apo and Merrill No. 6098, from Mt. Haleon, determined 
by Christ as this species. It has also been found in north- 
ern Negros. 
The stout caudex is erect, 15 to 30 em. high, and 
the stipe 1 m. high. 
Dryopteris megaphylla (Mett.) C. Chr. 
Rich soil along Bonyao river, alt. 750 m., No. 10009. 
Mindanao, Mindoro, and Luzon. 
Malaya. 
The pinnae of Elmers plants are cut half way to 
the costa, but I think it is safely referred to this species. 
The fronds reach a height of two m. 
Dryopteris ferox (Bl) 0. K. var. calvescens Christ in 
Philip. Journ. Sci. 2 C (1907) 193. 
No. 10182. Stipes 2 m. long, lamina 4 m. 
The variety described from Zamboanga. 
Dryopteris canescens (Bl) C. Chr. var. llobata Christ, 
ibid. p. 198. 
Rare in a wet, wooded. depression, alt. 1350 m., No. 10204. 
Luzon. 
Java, Celebes, 
Dryopteris canescens (BL) C. Chr. var. subsimplicifolia 
Christ, ibid. p. 199. 
^ On cliffs near waterfall of the Bonyao river, alt. 850 m., 
No. 10278. 
^ Luzon, Mindanao, 
This impresses me as a valid species, near D. lineata and 
D. Spenceri. 
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