﻿792 APPENDIX. 4. DICKSONIA. 



ced on the upper side at the base. Pinnulae ± 20 on each side, close, lower 

 and central deltoid, lowest + 15 c.M. long, ± 12 c.M. broad, stalked, acu- 

 minate. Tertiary segments deltoid-oblong, acuminate, + 12 on each side, 

 the lowest ± 6 c.M. long, + 5 c.M. broad, petiolale, rather unequal-sided. 

 Quaternary segments oblong, acute, the lowest free, ± l^j^ c.M. long, + 8 

 ni.M. broad, rather unequal-sided, the margin serrate, the teeth triangular, 

 acute, mucronate. Texture coriaceous; upper surface naked, rather glossy, 

 lower hairy on the veins ; colour ochraceous-greeii ; veins forked or pinnate 

 in the ultimate segments, rather obscure. Sori numerous, terminal on the 

 teeth, surpassed by the nmcrones, 1 to each tooth, occupying especially the 

 anterior side; indusium coriaceous, globose, irregularly 2-valved. 

 Luzon. 



(3) O. g'raisclis, Ust., Fed., Rep., V, 34. 

 • Fronds large, 4-pinnate. Pinnae subsessile, to nearly 1 M. long, 30 c.M. 

 brood, linear-oblong, the apex acuminate, serrate, the rachis sulcate above. 

 Pinnulae subsessile, linear-lanceolate, acuminate, suberecto-patent or subfalcate, 

 I lie central ones the longest, to 16 c.M. long, 4*/^ c.iM. broad, the lower 

 not n)uch smaller, the higher gradually reduced. Tertiary divisions short- 

 slalked or sessile, the higher ones sessile with a broad base, the lower 

 and central linear, obtuse, to 2 c.M. long or a little longer, nearly ^/^ 

 c.M. broad, pinnate towards the base, pinnatifid towards, the apex. Ultimate 

 segments short-oblong, narrowed at the base, the lower ones short-stalked, the 

 central sessile, both sterile and fertile deeply toothed with 2—3 leeth 

 on each side. Texture coriaceous; surfaces nearly naked, upper blackish- 

 green, glossy, lower paler; primary rachis unkwown, secondary and tertiary 

 ones short-ferrugineo-tomentose above (the tomentum more or less intermixed 

 with longer, rubro-fuscous hairs), the under side deciduously tomentose, glossy, 

 black, verruculose; central ribs of the ultimate segments subpellucid, with 

 2-- 3 veins on each side. Sori subglobose, 1 to each ultimate segment, ter- 

 minal on the lowest anterior vein; indusium 2-valved, the valves similar, 

 subentire. 



New Guinea. 



S. CIBOTIUM:, Uaulfuss. 

 * C- baroiuet-x, «y. Sm.s Polypodium Baromelz, L., (oldest name). 



