﻿22. DBYOPTERIS. § 1. LASTRAEA. 179 



d.d.d. Under surface villous. Texture herbaceous. Sori medial. 



(40) D. flaccida. 

 c.c. Fronds more than 75 c.M. long. (^la) D. splendens. 



h.h.h. Secondary segments pinnafifid. ("^1^) D. phegopteroidea. 



a.a.n.tt. Fronds at least deeply 3-pinnatifid at the base. 



h'. Tertiary segments entire, crenulate or slightly toothed, 

 c' Rachis naked or nearly so. 



.'. 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. 

 d'. Sori nearer the edge than the costulae. 



:^. Ultimate segments separated by an intermediate vein, 

 which unites the casta with the top of the sinus. 



(45) D. Raciborskii. 

 ■^.■^.Lntermediate veins wanting. (46) D. recedens. 



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



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



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



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



f'.f. Sori medial. (49) D. padangensis. 



c'.c'.c'. Rachis scaly. 



$. Texture coriaceous. Sori occupying nearly the whole under 

 surface of the small ultimate segments. (50) D. vilis. 



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

 on the veins. 

 !. Fronds at utmost + i5 c.M. broad. 



f. Rhizome short-creeping. (51) D. intermedia. 



•J-.-J". Caudex erect. (52) D. sarawakensis. 



/..'. Fully developed fronds more than + 20 c.M. broad. 

 f. Ultimate segments to i c.M. long. (53) D. pulvinulifera. 

 •J'.f. Ultimate segments 2 — 2\ c.M. long. 



(54) D. aciculata. 

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

 J. Rachis naked, or slightly scaly. 



(*) See also D. sparsa, 0. Ktze & Raciborskii, v. A. v. R. 



