756 88. osMUNDA. 



§ 1. PLENASIUM. 



• (1) O. javanica, m., Rac, Flor. Btz., I, o; Bedd. Ferns S.I., 

 tab. LXXVII; Q. BaHlteiaofelia, Ku hn , Ann . Muti . Bot . I .. B . , IV , 398; . Prgs ^ 

 liana, J. Sm., Diolc, in ffngl, fr Pnintlj Wat, PII.Faniij T*, fig..naOBj Aj fl> hro- 

 molia»foliai Copel . , P b il i pp . J o urn.t II, lili 



Caudex stout, erect, 30 — 50 c.M. high, 10 — 20 c.M. or more thick. 

 ^ Stipes 15 — 30 c.M. long, erect, firm, naked. Fronds to 3 M. long, 30—60 



(S. 



B c.M. broad, simply pinnate, the lower or central pinnae fertile. Barren pin- 



's, nae erecto-patent, ^j^ — 3 c.M. broad, lanceolate, the point acute, the edge 



^ entire, crenate, serrulate or toothed, the base cuneate. Texture coriaceous; _ 



(D 



03 



rachis and surfaces naked; veins distinct, pinnate to subdichotomous, spreading! 

 to erecto-patent. 



TMp. iltifl) Japa n , Kamtohai/ca , — 



(2) O. blechnoides, ZoU., Syst. Verz., 49. 



Very near 0. javanica, BL, but broader and thicker. — A dubious species. 



Java. 



89. LEF'T'OPTEK-IS, J>re«l. 



Sori roundish-oblong, dorsal, occupying the lower part of the veins. 



Fronds at least "2-pinnate, thinly membranaceous (+ as in flymenophyl- 

 lum); pinnae not articulate to the rachis, the fertile ones not contracted; 

 veins free. Diels, in Engl. & Prautl, Nat. Pfl.Fam., P, fig. 204, B— C. 



Almost confined to the south temperate zone. 



*. Fronds %finnate. Pinmlae deeply toothed. (i) L. Wilkesiana. 



*.*. Fronds 3-pinnatifid. Tertiary segments entire. (2) L. alpina. 



(1) E.. l¥ilkesiana, Cfcrtoi, Farnkr. d. Erde, 334; Todea Wilke- 

 siana, Brack., Wilk.. Expl. Exp., XVI, tab. XLIII; T. Fraseri, Hk. & Grev., 

 var. Wilkesiana, Hk. Bk., Sp. Fil., 427. 



Caudex erect, arborescent, to 2—5 M. high. Stipes 15—28 c.M. long, 

 firm, naked. Fronds 1-2 M. long, 50—80 c.M. broad, ovate, 2-pinnate. Pin' 



