ASPIDIE^ STEXOSEMIA. 41 



(1) S. aurita Presl. Rhizome erect, short; stipe of sterile frond 15 to 

 20 cm. high, of fertile 20 to 30 cm., ebeneous, bearing a few lax palese; 

 sterile frond 8 to 20 cm. high and broad, its central part deeply pinnatifid 

 with entire, or obtusely serrate, lanceolate lobes; lateral pinnae very 

 unequal sided, with lowest basiscopic segment pinnatifid, membranaceous, 

 glabrous or with scattered hairs, especially on the veins; fertile on the 

 same plan as the sterile, but rather smaller and the segments hardly over 

 1 mm. broad; terrestrial. 



Leyte, Cuming 295; Zamboanga, Copeland 738; Davao, Warburg 14170, 

 Copeland 957. 



Malaya to Polynesia. 



(9) GYMNOPTERIS Bernhardi. 



Rhizome usually creeping; frond simple or pinnate, the fertile much 

 contracted; veinlets copiously anastomosing, with, or less frequently with- 

 out, free included veinlets; sori covering the entire dorsal surface, exindu- 

 siate. Mostly terrestrial ferns of small or moderate stature. 



1. Sterile frond simple, entire, or nearly so. 



2. Main veins evident nearly to the margin. 



3. Free included veinlets usually wanting (1) G. Unnaeana 



3. Free included veinlets copious (2) G. variabilis 



2. Main veins obscure, short, or none. 



3. Sterile frond about 5 cm. long (3) G. minor 



3. Sterile frond 15 cm. or more long. 



4. Rhizome creeping (4) G. lanceolata 



4. Rhizome scandent (5) G. axillaris 



1. Sterile frond typically trifld (6) G. taccaefolia 



1. Sterile frond typically pinnate. 



2. Lateral pinnas but one pair (7) G. flagellifera 



2. Lateral pinnae several pairs. 



3. Terminal pinna unlike the lateral. 

 4. Fonds 30 cm. or more high. 



5. Terminal pinna entire or sinuate (8) G. subrepanda 



5. Terminal pinna pinnatifid (9) G. repanda 



4. Fronds rarely 10 cm. high (10) G. inconstans 



3. Terminal pinna like the lateral. 



4. Free included veinlets few or none (11) G. contaminans 



4. Free included veinlets regularly present. 



5. Primary veins conspicuous (12) G. costata 



5. Primary veins obscure (13) G. presliana 



(1) G. linnaeana (Hooker). Rhizome wide-creeping; stipes 5 cm. 

 more or less high, slightly fibrillose below; sterile frond 10 to 20 cm. 

 high, 1 to 2 cm. broad, narrowed gradually to both ends, sometimes rooting 

 at the apex, entire, papyraceous, subopaque, dark green; main veins fine, 

 rather zigzag but distinct nearly to the margin; areola? copious, without 

 free veinlets; fertile frond hardly 10 cm. long, less than 1 cm. broad. 



Rizal, Loher. This plant often has a pair of minute free pinnae at the 

 base of the linear frond; or even the sterile frond pinnate. 

 Malaya. 



(2) G. variabilis (Hooker) Bedd. Rhizome wide-creeping; stipe of 

 sterile frond to 10 cm. high, of fertile 30 cm. or more; sterile frond 30 



