72 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. 



On some species, and on sparsely fruiting fronds of others, the lowest 

 pinnae are sterile, and the sori present are all of the Asplenium type. 



1. Simply pinnate. 



2. Pinnae entire or nearly so. 

 3. Pinnae few. 



4. Terminal pinna like lateral. 



5. Sori reaching margin (1) D. bantamense 



5. Sori remote from margin (2) D. palauanense 



4. Apex pinnatifld (3) D. cultratum 



3. Pinnae 8 or more pairs. 



4. Veins once or twice forked. 



5. Frond membranous (4) D. camarinum 



5. Frond subcoriaceous (5) D. pallidum 



4. Veinlets more numerous (6) D. sylvaticum 



2. Pinnae lobed. 



3. Upper half of pinna the more developed. 



4. Stipe and rachis more or less hairy (7) D. grammitoides 



4. Rachis naked, stipe nearly so (8) D. japonicum 



3. Pinnae equilateral. 



4. Rachis naked unless at base. 



5. Small, pinnae less than 10-jugate (9) D. bulbiferum 

 5. Large, pinnae more than 10- 

 jugate '. (10) D. speciosum 



4. Rachis flbrillose or hairy. 



5. Lower pinnae sessile _ (11) D. sorsogonense 



5. Lower pinnae stalked (12) D. petiolare 



1. Frond barely bipinnate (13) D. brachypodum 



1. Frond copiously bipinnate. 



2. Pinnules lobed less than half way to costa. 



3. Rachis naked, stipe nearly so (14) D. cyatheaefolium 



3. Rachis naked, stipe scaly below (15) D. latifolium 



3. Rachis and stipe tomentose (16) D. vestitum 



2. Pinnules lobed more than half way to costa. 



3. Fronds less than 50 cm. tall (17) D. deltoideum 



3. Fronds 1 m. or more tall. 



4. Sori reaching nearly to margin (18) D. meyenianum 



4. Sori falling well short of edge. 



5. Rachis green _ (19) D. polypodioides 



5. Rachis ebeneous (20) D. ebenum 



(1) D. bantamense Blume. Rhizome short, stout, scaly; stipe 15 to 

 30 cm. high, scaly at the base, firm, erect, stramineous; frond 20 to 40 

 cm. high, rarely simple, usually with a large terminal pinna and 1 to 3 

 pairs of similar but usually smaller lateral ones; pinnae 1 to 2 dm. long, 

 broadly lanceolate, entire or nearly so, acute or acuminate, narrowed to 

 an almost sessile base, glabrous, coriaceous; veins forked about three 

 times ; diplazioid sori extending from the midrib nearly to the margin. 



Sablan, Elmer; Rizal, Ramos; Negros, Copeland 60, 80; Balabac Island, 

 Steere. 



Himalayas, Hongkong, Malaya. 



(2) D. palauanense Copeland. Stipe firm, 30 to 40 cm. high, black and 

 black-scaly at the base, stramineous or brown above, glabrous; frond 30 to 

 60 cm. high, pinnate, terminal and lateral pinna alike; pinna about 6 pairs, 

 alternate, remote, larger ones 30 cm. long, rather narrowly lanceolate, 



