22. DBYOPTERIS. ^ 1. USTRAEA. HQ 



\ d.d.d. Under surface as in a.d. Son not costal. 



(40) D. flaccida. 

 c.c. Fronds more than 75 c.M. long. (41a) D. splendens. 



b.b.b. Secondary segments pinnalifid. (*1^) D.-phegopteroidea. 



a.a.a.u. Fronds at least deeply 3-pinnatifid at the base. 



v. Tertiary segments entire, crenulate or slightly toothed, 

 c' Rachis naked or\ glabrescent. 



!. Tertiary segments entire or crenulate. 



?. Texture herbaceous. Lobes crenulate. (42) D. dissecta. 

 ?.?. Texture subcoriaceous. Lobes entire. (45) D. papuana. 

 .'..'. Tertiary segments slightly ^ ± sparingly toothed. (44) D. sparsa. 

 c'.c'. Rachis more or less pubescent or pilose^ n-wt ^>^-- « ji 

 d'. Sori nearer the edge than the coslulae. 



;(c. Ultimate segments separated by an intermediate vein, 

 which unites the casta with the top of the sinus. 



(45) D. Raciborskii. 

 ifi.if.. Intermediate veins wanting.' yj ("46) D. recedens. 



d'.d'. Sori medial, or lower on the veins. 



e'. Rhizome wide-creeping. (47) D. borneensis. 



e'.e'. Rhizome short-creeping or erect. 



f. Sori close to the costulae.' (48) D. Millettii. 



f.f. Sori medial. /"*) (49) D. padangensis. 



c:e'.c'. Rachis scaly .^(f-^ ^f-J^;. aS^ L^.^^. ^ |/(, A. :if^*- ^ l<^.^^(" 

 $. Texture coriaceous. Sori occupying nearly the whole wider 



surface of the small ultimate segments. (SO) D. m^.'j£-T 



$.$. Texture herbaceous or moderately firm Sori medial, or lower 



on the veins. ,. ^^^^ 



[/. Fully developed ^fronds at best 20 cm. broad. 



f. Rhizome short-creeping. (81) D. intermedia. ^ 



f.f. Caudex erect. (82) D. sarawatehsis. 



Fully developed fronds at least 20 cm. broad. 



•{•. Ultimate segments to i c.M. long. (53) D. putvinuHfera. 

 f.f. Ultimate segments 2—2% cM. long. 



(84) D. acioulata. 

 b'.b'. Tertiary segments at least conspicuously toothed (*). . 

 ±. Rachis naked, or slightly scaly. 



vCiC 



(•) See also D. sparsa, 0. Jftee,[l». recedens 0. Ktze, D. dissecta 0. ^tee^ 



