IL KErHKODIUM, § LASTEEA. 263 



20. N. (Last.) attemtatiim, Baker ; st. 1 ft. or more 1., firm, glossy, naked ; 

 fr. 3-4 ft. 1., 2 ft. br. ; pinnoe 9-12 in. 1., |-| in. br., very acuminate at the point, 

 the edge cut three-quarters of the way down into entire, S[)reading, blunt lobes 

 1 lin. br., the basal lobes much reduced, lower pinnae slightly stalked ; texture 

 subcoriaceous ; rachis naked ; under sm-face glandular ; veinkts 12-16 on a 

 side ; sort in a close row near the midrib. — Lastrea, J. Sm. {not Brack.). 



Hab. Philippines, Cuming, 327. — Habit of DidymocJUwna polycarpa. 



21. N. (Last.) abruptum. Baker • st.\\ ft. 1., angular, slightly villose above ; 

 fr. 2-3 ft. 1., 1 ft. or more br. ; pinnm 6-8 in. 1., 1 in. br., cut down to a broadly- 

 winged rachis into close, acute, falcate, entire lobes ^ in. br., the basal lobes 

 rather reduced, and the pinnae on the upper side cut off in a slight curve ; texture 

 subcoriaceous, rigid ; rachis and both surfaces nearly naked ; veinlets prominent, 

 12-16 on a side, with the sori near the apex. — Aspid. Kze. Mett. (non Blame). 



Hab. Peru. — General habit and texture of N. ini'isum. 



22. N. (Last.) Sloanei, Baker ; rhizome stout, wide-creeping, scaly ; sJ. 1-2 ft. 

 I., smooth ; fr. 3-4 ft. 1., 1-2 ft. br. ; pinnee 6-12 in. 1., J-f in. br., cut down 

 nearly to the rachis into entire, linear-subfalcate lobes 1 Un. br., the basal ones 

 the largest ; texture subcoriaceous, rigid ; rachis and under surface naked or 

 finely villose; reinkis 10-15 on a side, with the sori midway between the edge 

 and midrib. — Polyp, invisum, Sw. non For^. N. macrourum and Serra, Hk. 

 Sp. i. p. Q&-8. 



Hab. Mexico and Caba, southward to Brazil and Pern. — A larger and more rigid 

 plant than N. patens, with narrower and more acate lobes, and closer and more pro- 

 minent veinlets. 



23. N. (Last.) immersum, Hk. ; st. tufted, 2 ft. I., or more, naked, sub- 

 stramineous; fr. 3-4 ft. 1., 1-2 ft. br. ; pinnce often 1 ft. 1., 1-1 J in. br., cut 

 down very nearly to the rachis into spreading linear lobes 1 lin. br., with more 

 than their own space between them ; texture papyraceo-herbaceous ; rachis and 

 under swrface naked or slightly pubescent and glandular ; veirdels 10-20 on a 

 side ; sari submarginal, immersed so as to project on the upper surface; huol. 

 subpeltate.— i//5-. Sp. 4. p. 112. 



Hab. Assam, Philippines, Malaccas, N. Caledonia. — Perhaps the involucre would 

 justify our placing this in Agjndium, but in other respects it comes near the following 

 four species. X. caudictilata, Presl, is said to diSer from this by its medial suri. 



24. N. (Last.) Spekei, Baker ; st. 1 ft. 1., stramineous, slender, fibrillose ; fr. 

 18-24 in. 1., 9-12 in. br. ; pinnce 4-6 in. 1., 1 in. br., cut down very nearly to 

 the rachis, entire, those of the fertile frond 1 lin. br., those of the barren firond 

 wider; texture papyraceo-herbaceous ; main rachis and that of the pinnae slightly 

 fibrillose ; under side naked ; teintets 8-12 on a side ; sori midway between the 

 edge and midrib ; incoL subpeltate. 



Hab. Johanna Island, Capt. Speke, Dr. Kirk; Angola, Welwilzach. — ^Thia comes near 

 the last bat the texlure is thinner, the veinlets are fewer, and the sori medial, and not 

 immersed. A plant from the Cameroon Mountains differs only by its more scaly 

 racbises. 



25. N. (Last.) cirrhosum, Baker ; st. 9-12 in. 1., tufted, slender, glanduloso- 

 pilose, and fibrillose, especially below ; st. 1 ft. 1., 6 in. br. ; pinnce spreading, 

 3 in. 1., j-f in. br., cut down very nearly to the rachis into linear-oblong entire 

 lobes ^ in. br. ; texture herbaceous ; rachis fibrillose and viscose, and midrib 

 beneath slightly so ; veinlets 5-6 on each side, with the sori nearly terminal. — 

 Aspidium, Schum. and Thonn. N. crinibulbon, Hk. Sp. 4. p. 92. t. 244. 



