﻿50 3. ALSOPHILA. 



2. Stipe or rachis scabrous. 



Jt^. Veins 7 — 8 on each side of the costulae. Sori medial. 



(10) A. trichodesma. 

 ^.)^c. Veins d 2 — 44 on each side. Sori subcostular. (11) A. scaberula. 

 2.2. Stipe and rachis not scabrous. 



3. Pinnulae or tertiary segments + dimorphous. 



§. Barren pinnulae slightly lobed, fertile ones deeply pin- 

 natifid. (12) A. dimorphsf. 



§.S. Both barren and fertile pinnulae deeply pinnatifid but 

 the fertile lobes much smaller than the barren ones. 



(13) A. Kingi. 

 3.3. Pinnulae and tertiary segments uniform. 



4f. Under surface densely hairy. (14) A. VVallacei. 



A.A. Under surface naked or + scaly. 

 5. Main rachis at best pubescent. 



•{•. Lobes entire. Pinnulae not caudate. 



(15) A. modesta. 

 •i•.•^. Lobes serrate. Pinnulae caudate. 



(16) A. caudata. 

 5.5. Main rachis pubescent and scaly. 



e. Surfaces naked. (17) A. sangirensis. 



€.€. Surfaces scaly on, the costulae. 



(18) A. lepidoclada. 

 1.1. Stipes aculeate or muricate. 



2'. Main rachis smooth, rough or slightly prickly near the base. 



3'. Beceptacle with a minute, spurious indusium at the inner side. 



(19) A. latebrosa. 

 3.3'. Spurious indusium wanting or consisting of a minute, orbicular 

 scale with the receptacle in the centre. 



1'. Main rachis furfuraceous, hairy or scaly, at least on the 

 upper side. 



5'. Spurious indusium present. (20) A. saparuensis. 



A'.5'. Spurious indusium (most probably) wanting. 



6'. Main rachis furfuraceous. (21) A. fuliginosa. 

 G'.6'. Main rachis hairy and slightly scaly. 



(22) A. lepifera. 

 l:'.l'. Main rachis naked or nearly so; spurious indusium [pro- 

 bably) wanting. 



