﻿73. DRYNARU. 697 



Arrangement of the sections. 



$ 1. EUDRYNARIA. Cup-leaves rather flat, at best slightly convex. Fertile 

 fronds pinnatifid, or pinnate with the segments contiguous and adnate 

 with a broad base. 



§2. PORONEMA. Cup-leaves as in § 1. Fertile fronds pinnate, the segments 

 stalked, or sessile with a cuneate or acute base. 



§ 3. THAYERIA. Cup-leaves induplicate or convolute. 



§ 1. EUDRYNARIA. 



a 



Sort in i row on each side of the costulae (central ribs of the segments). 

 b. Segments quite entire. (1) D. pleuridioides. 



h.b. Segments crenate or slightly toothed. (2) D. propinqua. 



a.a. Sori not as in a., 



1. Sori in 2 rows between the main veins of the segments. 



2. Segments connected by a broad wing. (3) D. descensa. 



2.2. Segments connected by a narrow wing. (4) D. quercifolia. 



l.±. Sori scattered irregularly. (5) D. sparsisora. 



* (1) D. pleuridioideis, !•»•. (not J. Sm.), Diels, in Engl. & 

 Prantl, Nat. Pfl.Fam., P, 530; Polypodium pleuridioides, Mett., Rac. Flor. Btz., 

 I, 117; P. Willdenowii, Bl. (not Bory), Flor. Jav., II, 156, tab. LXVI; — 

 var. amboinensis. 



Rhizome thick, the scales dense, narrow, linear or lanceolate, ciliate. Cup- 

 leaves 10 — 50 c.M. long, 7 — 20 c.M. broad, lohed + ^-way down, the lobes 

 blunt, linear-oblong. Fertile fronds 45 — 100 c.M. long, 20 — 40 c.M. broad, 

 with a distinct stipe, the lobes reaching down nearly or quite to the costa, 1 — 2 

 c.M. broad, blunt, acute or acuminate, quite entire ; lower lobes decurrent upon 

 the stipe. Texture subcoriaceous ; surfaces naked; areolae copious, with free 

 veinlets. Sori in 1 row on each side, very near the midribs, more or less 

 immersed. 



\far. amboinensis: Cup-leaves shallowly lobed; lobes of fertile 

 fronds + 5 c.M. broad, united at the base by a broad wing. 



Java; — var. amboinesis: Amboyna (Boerlage). 



