i54 



NATURAL HISTORY BULLETIN. 



Baker 1 says that D. obtus folia Willd. is the oldest name. 

 If this can be clearly established, i. e., if D. obtusifolia and D. 

 adiantoides are really identical, the former name should stand. 

 Hooker 2 however, places D. obtusifolia among the doubtful 

 species, but suggests its close relationship to D. adiantoides. 



The specimens are quite t}'pical. The rachises and lower 

 surface of the frond are, however, scurfy with minute scales 

 rather than hairy. The involucre is occasionally quite two- 

 lipped, the inner lip over-lapping, the species thus approach- 

 ing the sub-genus Eudicksonia. The pinna? near the apex of 

 the frond are once-pinnate or merely pinnatifid. The apices 

 of the pinnules vary from broadly obtuse to acuminate. The 

 fronds are 2 to 3 feet long, rather broadly triangular, with the 

 stipe and rachis brownish. 



Terrestrial in habit. Not common, in woods near Camp 

 Menocal. 



There seems to be no previous record of the occurrence of 

 this species in Nicaragua. 



2. D. rubig(nosa Kaulf PL xii, Fig. 10; PI. xm, Figs. 1, 2. 



Hook., Sp. Fil., vol. 1, p. 79, pi. xxvii A; Lieb., Mex. Breg., p. no; Mett, 

 Fil. Hort. Bot. Lip., p. 106; Eaton, Fil. Wr. et Fend., p. 213; Hook, and 

 Bak., Syn. Fil., p. 53; Hemsl., Biol. Cent. Am., vol. in, p. 597; Bak., 

 Biol. Cent. Am., vol. iv, p. 115; Bak., Jour. Bot., vol. xxn, p. 362 (the 

 two last from Costa Rica). 



D. dissecta Hook., Sp. Fil., vol. 1, p. 77. 



D. ant hrisci folia Kaulf., — Hook., Sp. Fil., vol. 1, p. 79, pi. xxvn B. 



Sitolobium rubiginosa Smith, Ferns, Brit, and For., p. 237. 



A handsome species which was rather common in the deep 

 woods near Castillo, chiefly on higher ground. Some of the 

 plants were arborescent with a stem 1 ]/ 2 feet high and 1 to 

 \y 2 inches in diameter, densely covered with black, sharp, 

 straight spines, some of which seem to be modified roots. 

 Other specimens in full fruit were acaulescent. 



The stipe, rachis and larger secondary rachises are aculeate 

 with sharp spines which are brownish or straw-colored like 



1 In Hook, and Bak., Syn. Fil., p. 52. 

 *Sp. Fil., vol. 1, p. Si. 



