202 150 



8. Lamina coriaceous. Pinnæ sessile. 



218. D. scleroplujUu (Kze.) C. Chr. 

 7. Surfaces hairy on the veins only, leaf-tissue gla- 

 brous, al least not pubescent by minute, stellate hairs. 



8. Costæ beneath sfellato-puberulous. 



215. I), sagitlata var. tenebrica (Jenm.). 

 8. Costæ beneath setose by simple hairs or glabrous. 

 9. Pinnæ short -stalked, rather deeply lobed; 

 costæ beneath setose. West-Indian species. 

 10. Veins simple, often prominent beneath. 

 Leaf-tissue glabrous; indusium setose. 



219. D. asplenioides (Sw.) O. Ktze. 

 10. Veins often forked. Leaf-tissue pubescent. 



220. D. hernmdiana (Hak.) Gilb. 

 9. Pinnæ sessile. Soulli- American species. 



10. Lamina terminating in a long pinnatifid 

 apex. Racliis and costæ beneath rather 

 setulose; upper surface pubescent. 

 11. Pinnæ not auricled at base. 



212. Ü. Peripae (Sod.) C. Chr. 

 11. Pinnæ auricled at base, the basal 

 ones reflexed. 

 12. Andes. Veins 2 — 3-jugate. Basal 



pinnæ reduced. 222. D. Jamesoni {Hk.)C. Chi: 

 12. Brazil. Veins 5 — 6-jugate. Basal 

 pinnæ scarcely reduced. 



223. D. Warmingii n. sp. 

 10. Lamina pinnate to short of the apex, 

 practically glabrous throughout. 

 5. Stellate hairs none, but racliis, ribs and indusium setose 

 by simple hairs. Pinnæ auricled at the upper base. 



221. D. semihastata (Kze.) O. Ktze. 

 4. Larger species: pinnæ 8 — 15 cm long, I'/s — 2'/-' cm broad, 

 broadly serrate. Rhizome not creeping. 



5. Most pinnæ auricled at llieir upper base, all sessile, the 

 lower ones retlexed. Stellate hairs few or none; upper 

 surface strigose by adpressed hairs. 



6. Under surface pubescent by short, non-adpressed hairs. 

 Only the basal pair of pinnæ retlexed. Rachis with 

 few stellate hairs. Pinnæ scarcely more than 5 cm 



long 223. D. Warmingii n. sj). 



(i. Under surface strigose by adpressed hairs. 2 — 3 pairs 

 of pinnæ reflexed. Stellate hairs none. Pinnæ 8 — 15 



cm long 224. D. macrotis (Hk.) O. Ktze. 



5. Pinnæ not auricled. Stellate hairs on rachis and often 

 on costæ beneath. Leaf-tissue generally glabrous. 

 (). Lower veins as a rule connivent to sinus, rarely , united. 

 7. Most pinnæ sessile, lower ones much retlexed. 



230. I), paiicijugu (Kl.) C. Chr. 

 7. Most pinnæ stalked, lower ones scarcely retlexed. 



228. D. pyramidala (Fée) Maxon. 

 (i. Basal pair of veins normally united, or at least run- 

 ning side by side to the sinus. 



