440 • 55. ASPLESIUM. § 1. THAMNOPTERIS. 



Van. plicatum: Fronds obtuse, rigidly coriaceous, plicate, the 

 edge undulate. 

 Paleotropical. 



(4) A. eymbifolium, Christ, Bull. Herb. Boiss., 2« S6rie, VI, 

 999; Copel., Philipp. Journ., U, 130. 



Fronds sessile, 55 — 120 c.M. long, 15—20 c.M. broad in the upper part, 

 slightly narrowed below the middle, the base as broad or broader, 12 — 15 

 c.M. broad, (cordate after Christ), subscariose (chartaceous after Copel.), the 

 edge entire, the apex subacute or abruptly short-acuminate. Texture mem- 

 branaceous (subcoriaceous after Copel.), flaccid; costa very prominent, black 

 or castaneous, woody ; veins nearly spreading, slender, 1 — 2 m.M. apart, simple, 

 connected by a distinct intramarginal line. Sori numerous, reaching from the 

 costa to '/,j on the way to the edge, separated by 1 — 2 sterile *veins; indu- 

 sium yellow (brown after Copel.). 



Luzon. 



% 2. NEOTTOPTERIS. 



±. Texture herbaceous to papyraceous. 



f. Fronds narrowed below into a rather suddenly truncate or subacute base. 

 -h. Rhizome scales few, scatterel. (5) A. epiphyticum. 



-I-.+. Rhizome scales numerous, dense. (6) A. amboinense. 



•{•••{•. Fronds gradually decurremt at the base. 



X. Fronds lanceolate, not suddenly narrowed into the lower half. 



(7) A. concolor. 

 x.x. Fronds spathulate, rather suddenly narrowed into the wing-like 

 lower half (8) A. spathulatum. 



±.1. Fronds coriaceous or nearly so. 

 2. Stipes naked or nearly so. 



a. Margin entire or subentire. 



h. Fronds small, under 30 c.M. long. (9) A. microxiphion. 



6.6. Fully developed fronds more than 30 c.M. long. 



c. Stipes seriate. Sori erecto-patcnt. (19) A. batuense. 



c.c. Stipes tufted. Sori patent. (n) A. Scortechinii. 



