71. DASii. 443 



distinct crisped wing throughout ; fertile fr. on longer st. than the bairen ones, 

 and the pinnae moie distinctly stalked and not so close. — Moore, Ind. Fil. p. 288. 



Eab. Tarapota, East Pern, Spruce 4710. 



4. D. Ztprieurii, Kze. ; st. 6-9 in. 1., slender, nearly naked, with 3-4 distinct 

 articulations; harren fr. 6-9 in. I., 3-4 in. br., with abont 6 sessile pinnm on 

 each side, which are 1^2 in. L, f in. br., oblong-falcate, the edge crisped, the 

 lowest pair nearly equalling the others ; ia^tar'e snbcoriaceous ; veins very fine 

 and close, usually once forked ; radUs slender, swollen at the nodes, slightly 

 winged upwards ; fertile fr. on a longer st. than the barren one, the pianc 

 sunilar, but smaller. — Kze. t. 60. 



Hab. Gniana and the Amazon VaDey. — This forms the section Arthrodancea of Pre&l, 

 characterized by a distinctly articnlated stem. 



5. D. humilis-j Moore ; St. of barren fr. 2-4 in. L, forfuraceoua, with 0-1 node ; 

 barren fr. abont 1 ft. 1., 2-3 in. br^ with 15-25 close pintUB on each side, the 

 central ones 1^ in. 1., ^-§ in. br., distinctly stalked, die point blunt, the edge 

 slightly crisped, the base on both sides rounded or subcordate ; lower pmnae 

 rather shorter dian the others ; texture fleshy-herbaceous ; rachis furfuraceous, 

 distinctly winged throughout ; veins fine and close ; fertile fr. like the other, hut 

 smaller. — Moore, Ind. FiLp. 286. 



Hab. El Ecnador, Seemann 996 ; and a plant gathered by Br. Spmce in East Pern 

 (^1769) is prolnbly the same. Some of Dr. Seemann's specimens are proliferoos at the 

 apes. 



6. D. olata. Smith ; st. of barren fr. 2-6 in. 1., densely furfuraceous, with 0-1 

 nods ; barren fr. 12-18 in. 1., 6-8 in. br., with 8-10 pinnee on each side, the 

 central ones short-stalked, 3-5 in. 1., j in. br., the apex acuminate or cuspidate, 

 serrated, the base rounded, the lowest pair distant and much reduced ; texture 

 Eubcoriaceous ; racMs and midrib beneath furfuraceous, the former distinctly 

 winged in the upper half ; veins conspicuous, usually simple ; fertile fr. on a 

 longer st-., the pinnse stalked more distinctly, 1-3 in. 1., acnte or obtuse, 3-4 lin. 

 br.— P/«»». t. 109.- Bi. if Gr. t. 18. 



Hab. West Indies. 



7. D. Ai^uStii, Karst. ; st. of barren fr. 3-4 in. L, slender, naked, with 1-2 

 nodes ; barren fr. about 1 ft. 1., 6-8 in. br., with 4-5 pitmae on each side, which 

 are 3-4 in. L, ^-f in. br., the upper ones sessile, the lowest stalked and slightly 

 rednced, all narrowed to the base, the upper part inciso-crenate ; texture herba- 

 ceous ; colour dark-green ; reins not Tery close, usually once forked ; raebis 

 naked, shghtly winged upwards ; fertile pinnee similar . — Sturm in Mart. Fl. 

 Bras. fuse. 2-3. p. 159. 



Hab. Venezaela, Karsten. 



8. D. Moritziana, Presl ; «f. of barren fr. 8-12 in. 1., slightly furfuraceous, 

 with 1-2 nodes ; barren fr. 12-18 in. 1., 6-10 in. br., widi 10-12 pinnee on each 

 side, all sessile or nearly so, 3-5 in. 1., ^-1 in. br., the apex acnminate or cus- 

 pidate, sharply toothed, the base coneate, the lowest pair not distant or reduced ; 

 texture snbcoriaceous ; Teins close, mostly once forked ; rachu nearly naked, 

 slightly winged towards the apex ; fertile pinnw 1^2 in. 1., ^ in. br. — Presl, 

 Suppl. 6. p. 35. 



Hab. Columbia to Pern. — Midway between alaia and dliplica. 



9. D. stenoph/Ua, Kze. ; st. of barren fr. abont 1 ft. 1, naked, with 2-3 nodes ; 

 barren fr. 1^-2 ft. L, 6-10 in. br., witi> 12-15 pairs of pinnae, the upper sessile, 



