﻿386 49. BLECHNUM. § 1. EUBLECHNUM. 



* (1) B. Treubii, «. a. «. jr., Bull. Dep. Agr. I. N., 1908,XYm, 13. 



Small. Rhizome short, erect or nearly so, slightly scaly, copiously stolo- 

 niferous so as to form a dense mass of low plants. Stipes tufted, clothed with 

 few, scattered scales, but more copiously towards the base, slender, erect, 

 2 — 5 c.M. long. Fronds simple, lanceolate, 4 — 9 c.M. long, 8 — 12 m.M. broad, 

 nari'owed gradually towards both ends, the apex acuminate, but the point 

 bluntish, the margin entire or slightly irregular, the very base not rarely pur- 

 veyed with 1 — 2 minute auricles. Texture subcoriaceous ; surfaces naked; 

 veins not very close, some of them sometimes anastomosing, mostly forked, 

 sometimes simple or 3-furcate, the apex thickened, not reaching the margin. 

 Sori long, continuous or interrupted, close to the costa, not reaching the base 

 and apex of the fronds. — Very near the brazilian and panaman B. lan- 

 ceola, Sw. (Hk. Bk., Syn. Fil., 183; Hk., Icon. PL, X, tab. CMLXX, right-hand 

 figure), but distinguished from Baker's description and Hooker's drawing by 

 the tufted stipes, the smaller fronds, the mostly once forked and sometimes 

 anastomosing veins. — It bears the name of Prof. Dr. M. Treub, Director of 

 the Agricultural Department in Netherlands India. 



Java (Mount Salah). 



(2) H. isllldaBiM, JPi-., Hk. Bk., Syn. Fil., 184; Hk., Spec. Fil., Ill, 

 tab. CLV; B. elongatum, Gavd., Freyc, Voy. Ur. Phys., Bot., 59S; C. Chr., Ind. Fil. 



Stipes stout, erect, naked, .7 — 10 c.M. long. Fronds oblong-lanceolate, 50 

 c.M. or more long, 10 — 15 c.M. broad. Segments numerous, erecto-patent, sub- 

 falcate, linear, 7—10 c.M. long, V2 — IV2 c.M. broad, narrowed gradually 

 towards the point, dilated and connected at the base, the edge undulato-den- 

 tate; lower segments linear, acute and not much smaller than the rest. 

 Texture coriaceous, rachis and both surfaces naked; veins fine. Sori in a 

 continuous line on each side close to the midrib; indusium conspicuous. 



Philippines; Polynesia, Brasilia. 



(3) SS. cartilaginewiii, Sw., Hk. Bk., Syn. Fil., 184; B.nitidum, 

 Pr., var. coniracta, Hk., Spec. Fil., Ill, 44, tab. CLVI. 



Rhizome oblique, densely clothed at the crown with blackish, fibrillose 

 scales. Stipes strong, erect, 10 — 15 c.M. long, scaly and muricate in the lower 

 part. Fronds ovate-oblong, 30 — 60 c.M. long, 15 — 25 c.M. broad. Segments 

 numerous, erecto-patent, linear, '/a — 1 Vi ^-M- broad, narrowed gradually 

 towards the apex, the margin finely toothed, dilated and connected at the base, 

 the lower ones not much smaller than the others. Texture coriaceous; rachis 



