530 64. ANTROPHTUM. 



h, Paraphyses linear, the apex abruptly thickened, clavate, obpyriform or 

 capitate. 

 c. Fully developped fronds mostly under 2 c.M. broad. 



•{■. Fronds blunt or rounded at the apex. (3) A. immersum. 

 f .•^. Fronds acute or acuminate at the apex. (4) A. parvulum. 

 C.C. Fully developed fronds 2 c.M. or more broad. 



d. Fronds sessile or short-stalked, i.e. the unwinged part of the 

 stipe very short with regard to the length of the whole frond. 

 e. Costa wanting towards the apex of the frond only. 



(5) A. costatuin. 

 e.e. Costa wanting throughout or at best present in the lower 

 half of the frond. 



f. Fronds thinly charlaceous. Paraphyses globose at 



the apex. (6) A strictuni. 



f.f. Fronds coriaceous. Paraphyses clavate at the apex. 



(7) A. semicostatum. 



d.d. Fronds rather long-stalked, i.e. the unwinged part of the stipe 



not very short with regard to the length of the whole frond. 



3tc. Sort superficial. (8) A. latifolium. 



in.Jiii.Sori immersed. 



X. Texture subcHrfaceous, rather thick. 



(9) A. plantagineum. 

 x.x. Texture membranaceous, pellucid. (10) A. elongatuni. 

 h.h. Paraphyses linear, the apex not or hardly thickened. 

 £. Fully developed fronds at best + 2 c.M. broad. 



*. Sori few, in 2 — 6 lines. (11) A. subfalcatum. 



*.:<c. Sori rather copious. (12) A. coriaceura. 



l.£. Fully developed fronds + 2% — iO c.M. broad. 



S. Fronds broadly spathulate, rather small, to ± iO c.M. long. 



(15) A. ovatum. 

 S.S. Fronds ligulate, lanceolate or spathulate, more thorn iO c.M. 

 long in the fully developed plants. 



3. Sori ± straight, continuous or interrupted, not reticulate. 

 X. Fronds ligulate-lanceolale. Costa wanting ^ or only 

 w distinct towards the base of the frond. 



(14) A. callifolium. 



x.x. Fronds spathulate-lanceolate. Costa more distinct in 



the lower half of the frond. (15) A. alatum. 



