178 4X» DKYOPTERIS. § 1. LASTRAEA. 



4'. Pinnae cut ^ ^jt-way down to the casta (*). 



(26) D. exigua. 

 *'.*'. Pinnae cut down ± to the casta. (27) D. conterminoides. 

 3'.3'. Sari near the margin, or terminal on the veins. 



•{•. Rhizome short. Veins 8 — 42 on a side. Fronds rather 

 large. (28) D. Luerssenii. 



•{•.•{•. Rhizome wide-creeping. Veins 4 — 5 on a side. Fronds 

 rather small. (29) D. Beddomei. 



1.1. Central ribs pinnate, lateral veins forked^ oT Se^'t Ti^i:::) k ,tc/ -^^v 

 t. Rachis scaly^v^ "^^--^i ^^"^' /w<.>i^ (30) D. adnata. 



. !J. Rachis naked, hairy or fibriliose. 

 •{•. Fronds under 75 c.M. long. 



f. ^ipeg=^^^BfffPeo^!m^. Surfaces naked. ■Rathii nakisd. 



(31) D. sagenioides. 

 ' ?.?. Stipet gre^* Surfaces finely pubescent. Set ^m - p u bes cent 



(32) D. singalanensis. 



i-.-f. Fronds more than 75 c.M. long when fully developed. Rachis 



fibrillose. (33) D. Wigmanii. 



u.a,a. Fronds pinnate. Pinnae cut down nearly or quite to the casta. Secondary 

 segments toothed or lobed. 



b. Secondary segments toothed^ sometimes lobate-dentate in No. 36. i 

 /. Sinuses with a tooth in the top, just between each pair of lobes. 



(35) D. syrmatica. 

 t.t. Sinuses wtihout/tooth m the top. Ii t duaia md whm young : 



(36) D. erythrosora. 

 b.b. Secondary segments labed, not pinnatifid. 

 c. Fronds under 75 c.M. long. 



d. Under surface quite naked, and not glandular. 



e. Ultimate lobes entire, with + 6 pairs of veins. Sari 

 subcostular. ' (37) D. Preslii. 



e.e. Ultimate lobes crenate ar toothed, with + 3 — 4 pairs 

 of veins. Sori medial on the lower veins. 



(38) D. chaerophyllifolia. 



d.d. Under surface not naked, at least not on the main veins. 



Sori costal. (39) D. edentula, 



(*) See also D. hlspldala, 0. Ktze. . 



