80. polybOtuVa. 723 



Rhizome erect or creeping, but not high-scandent. Fronds not articulate 

 to the rhizome, at least simply pinnate, dimorphous, the fertile ones not 

 Lomaria-like ; veins free in malayan material. 



Pantropical. 



Arrangement of the sections. 



§1. EGENOLFIA. Veins free; leaflets with a tooth or seta in the sinuses of 

 the cr'enations or lohes. Rhizome shorl-creeping. Hk. Bk., Syn. Fil., tah. 

 VII, fig. 60, h— j; Diels, in Engl. & Prantl, Nat. P(I. Faui., P, fig. 102. 



g2. PSOMIOCARPA. Veins free; leaflets without a tooth or seta in the 

 sinuses. Rhizome erect or slightly tuherous. Diels, 1. c, fig. 105, B. 



§3. EUPOLYBOTRYA. Veins free; leaflets without a tooth or seta in the 

 sinuses. Rhizome wide-creeping, scaly. Hk. Bk., 1. c, fig. 60, c— e; 

 Diels, 1. c, fig. 104. (Malayan ?). 



§ 4. ARTHROBOTRYA. Like § 3, but the rhizome naked ; leaflets articulate 

 to the rachis. 



§ 5. OLFERSIA. Vein tips united by an intramarginal transversing vein. Hk, 

 Bk., 1. c, fig. 60, m— 0. Diels, 1. c, fig. 103, E. (Not in Malaya). 



§ 6. SOROMANES. Veins anastomosing + as in Nephrodium, but less regu- 

 larly. Hk. Bk., 1. c, fig. 60, r— s; Diels, 1. c, fig, 105, C. (Not in 

 Malaya). 



Key to the species (*). 



Pinnae not articulate to the rachis. 



h. Leaflets with a tooth or seta in the sinuses of the crenalions or lobes. 



(1) P. appendiculata. 

 b.b. Leaflets without a tooth or seta in the sinuses. 

 c. Fronds 2-pinnatifid. 



d. Pinnae deciduously scaly at the margin. 



(4) P. stenosemioides. 



d.d. Pinnae not scaly at the margin. (2) P. Nieuwenbuisii. 



c.c. Fronds 2 — 3-pinnate. (3) P. apiifolia. 



Pinnae articulate to the rachis. (S) P. articulata. 



(*) The rhizome of one of the species being unknown to me, I don't follow thu arran- 

 gement of the sections in this key. 



