151 203 



7. Lamina teiniinatiiig in a long, hioad pinnatifid 



apex equal in length to the lower pinnate portion. 



<S. Upper surface minutely pubescent. Veins about 



3-jugate, those of basal pair the anastomosing. 



212. D. Peripae (Sod.) C. Chr. 

 8. Upper surface glabrous. Veins about 6-jiigate, 

 the lower 2 — 3 pairs alternately united. 



227. 1). haxtata (Fée) Urb. 

 7. Lamina pinnate to short of the apex. 



8. 2—3 pairs of veins alternatelv united. Pinnæ 



about 4 cm broad . . . 264. I), hiicophlebia (Christ) C. Chr, 

 8. Only the two basal veins united, the follow- 

 ing 2 — 4 connivent to sinus. Pinnæ rarely 2 cm 

 broad. 



9. Lower pinnæ not or slightly retlexed, more 

 or less shortened. 



10. Sporangia glabrous. No scales on costa' 

 beneath. Veins 4 — 5-jugate. Jamaica. 



225. D. serrulata (Sw.) C. Chi-. 

 10. Sporangia setose by furcate hairs. Small 

 scales on the costæ beneath. Veins 7—8- 

 jugate. Brazil .... 226. D. anoptera (Kze.) C. Chr. 

 9. Lower 2—3 pairs of pinnæ much retlexed, 



scarcely shortened... 231. D. réfracta (A. Br.) O. Ktze. 

 3. Pinnæ inci.sed '/s of the way to the midrib (lobes longer than 

 l)road) or to a narrow wing to the costa. 



4. Hachis and costæ beneath subglabrous or slightly pul)escent 

 by short, stellate hairs and a few longer, simple hairs, not 

 densely pulverulent by stellate hairs or tomentose by simple 

 hairs. 

 5. Branched hairs with erect or horizontal l)ranches. 



6. Rhizome erect or oblique. Pinnæ rarely incised to the 

 middle. 

 7. Most pinnæ sessile. 



8. Lamina terminating in a long, pinnatifid apex. 

 Sporangia setose by branched hairs. 



227. D. hastata var. leptocladia (Fée). 

 8. Lamina pinnate to short of the apex. Sporangia 

 glabrous. 



9. Lower pinnæ not reduced. Veins connivent, 

 not united. Lobes oblique or falcate, clo.se. 

 Stipe in length equal to lamina. 

 10. Lamina not gradually tapering from base 

 to apex. Pinnæ few (8 — 10-jugate). 

 11. Lower pinnæ with a short, cuneate, 

 entire base, not much retlexed. 



229. Ü. magdalenica Hieron. 

 11. Lower pinnæ lobed to the base, much 



reflexed 230. D. paucijuga (Kl.) C. Chr. 



10. Lamina gradually tapering from base to 

 apex. Pinnæ numerous (15 — 25 to a 

 side), incised to or above the middle. 



232. D. yeinnuilifeni Hirron. 



