﻿176 22. DRYOPTERIS. § 1. LASTRAEA. 



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



on each side in the secondary segments. 



(4) D. Koordersii. 



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



veins ± 4 — 5 on a side. 



(5) D. phaeostigma. 

 7.9, Rachis pid)escent or villose. 



•{•. 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 down to the 



costa. (7) D. crassifolia. 



S.e. Under surface pubescent. 



.'. Stipes scaly, at length scabrous. Fronds 

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

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

 20 C.M. broad. 



>|<. Stipes pubescent, subtufted. Pinnae 

 close, not dotted with white above. 

 (9) D. Teuscheri. 

 >tc.^. Stipes naked, scattered. Pinnae sub- 

 remote, dotted with white above. 



(10) D. pectinata. 

 5.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. 



>!<.>(?. Stipes hairy and scaly, brown. 



(12) D. Hallieri. 

 §.§. Rachis naked. 



^. Under surface glandular. [I'o) D. altenuata. 

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

 /i.4. Texture + membranaceous or herbaceous, 

 a. Sori medial, or lower on the veins. 



/3, Fronds mostly under 60 c.M. long. 

 7. Stipes naked. 



<?. Lower secondary segments not very 

 small. (15) D. Creaghii. 



