NEPIIRODIUM, '^ PLEOCNEMIA. 6] 



(Ira, and Neprolepis, are here excluded from this ffenus, but 

 more on account of habit and the general opinion in favour of 

 their being kept apart, than from any decided technical cha- 

 racters.) 



§ Pleocnemia. — Primary opposite veins next to the costce, one or more jjairs, 

 iniiling and forming angular, costal, elongated areoles, the others more or less 

 anastomosing, remote from the casta. Pleocnemia and Ilaplodictjuni, Pr. 



1. N. (Pleocnemia) Leuzeanum, Hook,; stipes H foot 

 long stout angular crinite at the base with very long suljulate 

 flexuose silky scales, fronds large ample submembranaceous 

 tripinnate, primary pinnaj a foot and more long ovate acumi- 

 nate petiolate, pinnules 3-4 inches long petiolulate from a 

 broad subcordate base oblong deeply (more than halfway 

 down) pinnatifid ending in a rather long entire acumen, fer- 

 tile ones often contracted, segments oblong obtuse subfalcate 

 entire crenato-serrate, the basal ones rarely sublobato-pinna- 

 tifid, veins uniting and forming elongated areoles near the 

 costa, in the sterile more or less united and reticulated at a 

 distance from the costa, sori copious more or less remote 

 from the margins, involucres orbiculari-cordate readily de- 

 ciduous. — Aspidium Leuzeanum, Kze. Bot. Zeit. 14. 474. 

 Metten. Fil. Hort. Lips. p. 94. t. 22. /. 8, 9. Pleocnemia, Pr. 

 Tent. Pterid.p. 183. Epimel. Plant, p. 50. Hook. Gen. Fil. 

 t. 70 A. {involucres omitted) and t. 97- /. Sm. in Hook. Journ. 

 Bot. \\\.p. 411. Brack. Fil. U. S. Expl. Exp. p. 183. Poly- 

 podium, Gaud, in Freyc. Voy. p. 371. /. 6. Pleocnemia Cu- 

 mingiana {fertile portions of the frond more contracted), Pr. 

 Epimel. Bat. p. 50. Aspidium conjugatum, Bl. En. Fil. Jav. 

 p. 169. Pleocnemia conjug., Pr. Epimel. Bot. p. 259 and P. 

 Javanica, 7;. 50. 



Ilab. Moluccas, Gaudichaud. Java, Blume, De Vriese and Teijsmann, n. 24, 

 n. 107, and n. 114 (pinnules small, sori at the margin of the segments). Ceram, 

 De Vriese and Teijsmann, n. 132. Luzon, Cuming, n. 33,34, 107, 289. China, 

 Beechey. Hongkong, Wilford, n. 152. Mishmee and Assam, Griffith, Simons. 

 Sylhet, WalUch, Hook. fit. and Thomson. Sanioan and Feejee Islands, Brackcnridge, 

 Harvey. Dr. Harvey's specimens from the Feejee Islands, in a dried state, are very 

 dark-coloured, blackish-green above, paler beneath, with more deeply pinnatifid 

 pinnules, and consequently longer segments and narrower in proportion. Bracken- 

 ridge's Feejee Island specimens are in all probability the same. — This Fern must i)e 

 a very noble one. Cuming speaks of it as a " Tree Fern ;" Brackcnridge says the 

 trunk is short, thick, erect, surmounted by large, spreading, bipinnated fronds from 

 12-15 feet in length. In regard to the venation, many of the pinn.T, especially 

 the fertile ones, have segments with entirely free venation, as in Lastrea, while 

 others have an opposite lower pair of branches or veinlcts united so as to form an 

 oblong costal areole, as in Etinephrodium ; while others have, in addition, one or 

 more series of areoles near the margin, as in Sagenia. 



