792 APPENDIX. 4. DICKSONIA. 



^»^ ^^ ^t.n ..ppor ciHo a> rhp haco Piiynnlao -L °)n »» ^not. t-i/ln ..Inon Iavttj 



and central deltoid, lowest + Id c.M. long, + 12 c.M. broad, stalJsB<iracu- 

 miuate. Tertiary segments deltoid-oblong, acuminate, + l^x<m each side, 

 the lowest + 6 c.M. long, + 5 c.31. broad, petiolatg,*«rSmer unequal-sided. 

 Quaternary segments oblong, acute, the lowest.^'^C^ ± I'/i c.M. long, + 8 

 m.M. broad, rather unequal-sided, thej»«tf^n sen-ale, the teeth triangular, 

 acute, mucronate. Texture cM'iajvwrtis; upper surface naked, rather glossy, 

 lower hairy on the vein^j-o-Colour ochraceous-green ; veins forked or pinnate 

 in the ultimate s&geitmts, father obscure. Sori numerous, terminal on the 

 teeth, surp^gsell by the nmcrones, 1 to each tooth, occupying especially the 

 anterji>r''^e ; indusium coriaceous, globose, irregularly 2-valved. 



LuSSOHi 



(3) O. graiidis, K**., Fed., Rep., V, 34. 



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

 broad, linear-oblong, the apex acuminate, serrate, the rachis sulcate above 

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

 the central ones the longest, to 16 c.M. long, i^l^ c.M. broad, the lower 

 not much smaller, the higher gradually reduced. Tertiary divisions short- 

 stalked 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 — 5 teeth 

 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 

 3— 5 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. 



Neiv Guinea. 



^ C. baroiiietx, ^. Sm.,- Polypockum Baromels, L., (oldest name). 



