discovered or described since T874. 197 
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. 
1 2. 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. DlCKSONlA V Her it. 
7*. D. fibrosa, Colenso. I cannot separate specifically D. sparman- 
niana, Colenso, in Trans. New Zeal. Instit. 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 aniardica and New Zealand fibrosa . 
7*. D. Lathamii, Moore, in Gard. Chron. 1885, vol. II, 584. A 
plant raised by Mr. W. G. Latham, in the Birmingham Botanic 
Garden. Intermediate between arborescens and antarclica. 
10. D. squarrosa, Sw. I cannot separate specifically D. gracilis, 
Colenso, in Trans. New Zeal. Instit. 1882, 306. 
11*. D. Baudouini, Fourn., in Ann. Sc. Nat. s 6 r. 5, t. 18, p. 347. 
New Caledonia, Baudouin. Allied to D. berteroana and De- 
plane hei. 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, 
