4. DICKSONIA. 75 



hairy above ; costulae above sparingly whitish-liairy, beneath rather densely 

 clothed with reddish, articulated hairs; veins naked or nearly so. Sori 

 marginal, globose; indusium with the upper valve entire, the lower 

 crenated. 



War. glabresceus: Rachises nearly naked; lobules looser. 



New Guinea. 



4«- BA.Li^\.]NTIXJJVI, Katdfuss. 



Like Dicksonia, but the indusium occasionally more or less cup-shaped 

 (as in Dennstaedtia) and the annulus of the sporangia sometimes vertical 

 and incomplete (as in the Polypodiaceae). 



Caudex more or less arborescent, but usually not rising much above 

 the ground. Fronds decompound, with the ultimate segments unequal- 

 sided at the base, the anterior side the most developed. — Diels, in 

 Engl. & Prantl, Nat. Pfl.fam., P, fig. 78 A. (') 



Malaya, Polynesia, Trop. America, Azores. 



*. Sori in the sinuses of the teeth. ■ (1) B. javanicum. 

 ±.±. Sori on the teeth. 



a. Fronds under 50 cm. long. . 2 . B. pilosum. 



3.S, Fronds more than 50 cm. long. (3) B. Copelandi. 



1 1,1 B. Javanicum, CopeL, in Philipp. Journ., IV^', 62; Dennstaedtia 

 javanica, Christ., in Bull. Herb. Boiss., 2eSene,lY, 617 ; Dicksonia javanica, 

 BL, Rac, Flor. Btz., I, 120. 



Caudex arborescent but not high, rather slender. Stipe and rachis 

 densely covered with short, adpressed hairs. Fronds lanceolate-oblong, 

 up to IV2 m. long, to 60 cm. broad. Pinnae and pinnulae ovate-oblong. 



(') This genus, as treated by Copeland, is very nearly related to both Dicli-sonia 

 and Dennstaedtia. — See Copeland's information in Philipp. Journ., Ilic, 301. 



