discovered or described since 1874. 17 



distinct. Sori 2 to the lower pinnae ; indusium small, with a 



fimbriate edge. Siao-wu-tai, Pekin, Hancock (Herb. Hance). 



Habit of dwarf forms of polystichoides ; sori of glabella ; stipe 



and rachis stramineous, not castaneous. 

 12. W. obtusa, Torrey. I cannot separate as a species W. Plum- 



merae, Lemmon, in Coulter, Bot. Gazette, VII. 6, from 



Southern Arizona. 

 12*. W. pusilla, Fourn., in Bull. Soc. Bot. France, 1880, 329. 



Mexico, Schaffner. Not seen. 



Genus 13. DICKSONIA UHfrit. 



7*. D. flbrosa, Colenso. I cannot separate specifically D. sparman- 

 niana, Colenso, in Trans. New Zeal. Instil. 1879, 363, nor 

 D. microcarpa, Colenso, in Trans. New Zeal. Instit. 1888, 214. 

 The Chatham Island Dicksonia is said to be intermediate 

 between the Australian anlarciica and New Zealand fibrosa. 

 7*. D. Lathamii, Moore, in Card. Chron. 1885, vol. II, 584. A 

 plant raised by Mr. W. G. Latham, in the Birmingham Botanic 

 Garden. Intermediate between arborescens and antarctica. 



10. D. squarrosa, Sw. I cannot separate specifically D. gracilis, 

 Colenso, in Trans. New Zeal. Instit. 1882, 306. 



11*. D. Baud.oui.ni, Fourn., in Ann. Sc. Nat. se*r. 5, t. 18, p. 347. 

 New Caledonia, Baudouin. Allied to D. berteroana and De- 

 planchei. Not seen. 



18*. D. ampla, Baker, in Journ. Linn. Soc. XXII. 223. Sarawak, 

 Borneo, Bishop Hose. 



18*. D. Pearcei, Baker, n. sp. Rootstock not seen. Stipe long, 

 naked, castaneous. Frond oblong-deltoid, tripinnate, a foot 

 long, moderately firm, glabrous above, hairy on the ribs beneath ; 

 lower pinnae the largest, subdeltoid ; pinnules sessile, lanceo- 

 late, cut down to the rachis into oblong obtuse entire tertiary 

 segments, |- in. broad. Veins of tertiary segments few, distinct; 

 lower veinlets forked. Sori not more than one to each tertiary 

 segment; indusium campanulate, coriaceous, with a truncate 

 mouth. Eastern Andes of Ecuador, alt. 8000-9000 feet, 

 Pearce, 251. Very distinct. 



18*. D. pubescens, Baker, in Journ. Bot. 1881, 203. New Granada, 

 province of Antioquia, alt. 6500 feet, Kalbreyer. 



