l'?6 22. DRYOPTBWS. § 1. USTRAEA. 



S. Fronds + i5 c.M. long; veins + 8 



on each side in the secondary segments. 



(4) D. Koordersii. 



8.8. Fronds more than 50 c.M. long; 



veins + 4 — 5 on a side. 



(5) D. phaeostigma. 



y.y. Raphis piiboeoont or villose. ti^ in.aJc^. 



•{•. Pinnae under 6 c.M. long, cut down 



to the ,costa . (6) D. gymnopoda. 



•$•.•{•. Longest ^pinnae more than 6 c.M. 



long, cut to — ^j - ^'Way' dovtm — to tho^ 



ooefa. — (7) D. crassifolia. 



e.6. Under surface pubescent. 



!. Stipes scaly, at length scabrous. Frmuis 

 more than 20 c.M. broad. (8) D. echinata. 

 .'..'. Stipes naked or pubescent. Fronds under 

 SO c.M. broad. 

 *. Stipes hairy or scaly. 



oloeo, n ot dottod with nvhito above - 

 , (9) D. Teuscheri. 

 :^.-^. Stipes naked above the base. 

 rmnotOi dottod with whito abovo r 



(10) D. pectinata. 

 S.S. Fully developed fronds more than 75 c.M. long. 

 %. Rachis pubescent or scaly, under surface pubes- 

 cent on the veins. 



yf.. Stipes naked, grey. (11) D. ligulata. 



:^.i(i. Stipes hairy and scaly, brown. 



(12) D. Hallieri. 

 $.$. Rachis naked^ irr vtr (. t%.^ ^is*^^ v'4 . . '■ /^^ 

 ■{.. Under surface glandular, (lo) D. attenuata. 

 f.f. Under surface naked. (14) D. Beccariana. 

 <f.4. Texture + membranaceous, herbaceous or somewhat fleshy 

 a. Sort medial, or lower on the veins. 



p. Fronds mostly under 60 c.M. long, 

 y. Stipes naked. 



<?. Lower secondary segments not very 

 small. (IS) D. Creaghii. 



