50 13. DICKSONIA, EUDICKSONIA. 



4. D. (Cibotiuin) Chamissoi ; arborescent;// 1 , bipinnate ; lower pinna? ovate* 

 lanceolate, 12-18 in. 1., 6-9 in. br. ; pinnl. linear-acuminate, cut down to the 

 rachis below ; segm. oblong, bluntish, scarcely falcate ; texture coriaceous ; under 

 surface not glaucous, sometimes furfuraceous ; veins immersed ; lateral veins of 

 the segments usually once forked ; sori 2 to 12 to a lobe ; valves unequal, outer 

 one larger, suborbicular, inner one oblong. ~Hk. Sp. Fil. 1. p. 83. 



Hab. Oahu, Sandwich Islands. 



5. D. (Oibotiuin) Schiedei ; arborescent ; fr. bipinnate, ovate-lanceolate, 12-18 

 in. 1., 6-9 in. br. ; pinnl. linear, much acuminated, cut down nearly or quite to the 

 rachis ; lobes narrow, linear, acute, subfalcate ; texture suhcoriaceous ; upper 

 surface shining, dark-green, under side glaucous or arachnoid ; veins not promi- 

 nent ; lateral veins of the segments usually once forked ; sari 2 to 12 to a lobe, 

 the valves short, hemispherical, nearly equal. Hk. Sp. Fil. 1. p. 84. t. 30. A. 



Hab. Mexico and Guatemala. All the five species appear to resemble one another 

 very closely. The caudex of this is said by Galeotti to attain a height of from 10-15 ft. 



Eudicksonia. Involucre distinctly 2-valved, the outer valve formed by the apex 

 of a segment. Sp. 6-17. 



6. D. arborescens, L'Herit. ; arborescent ; fr. bipinnate ; lower pinna? 12-18 

 in. 1., 6-9 in. br. ; pinnl. linear, cut down nearly or quite to the rachis ; segm. 

 ^ in. 1., J in. br., oblong ; rachises tomentose throughout, the main one densely 

 clothed ^at the base with linear ferruginous scales ; texture very coriaceous ; 

 fertile pinnl. often conspicuously contracted ; sori 2 to 6 to a lobe, large, globose ; 

 valves transversely oblong, nearly equal. Hk. Sp. Fil. 1. p. 66. t. 22. A. 



Hab. St. Helena, near the summit of Diana's Peak ; caudex about 10 ft. high. 



7. D. antarctica, Labill. ; arborescent ; fr. bipinnate ; lower pinnce 12-18 in. 1., 

 6 in. br. ; pinnl. linear-acuminate, cut down to the rachis except at the apex ; 

 scgm.^ linear, acute, pinnatifid sometimes nearly to the rachis, J-J in. 1., -| in. br. ; 

 rachises naked or tomentose ; texture coriaceous ; upper surface naked, under 

 naked or more or less hairy, not glaucous ; fertile pinnl. slightly contracted ; sori 

 2 to 12 to a lobe, % a line across ; valves suborbicular. Hk. Sp. Fil. 1. p. 66. 

 D. fibrosa, Colenso, Hk. Sp. Fil. I. p. 68. t. 33. B, D. lanata, Colenso, Hk. Sp. 

 Fil. 1. p. 69. t. 33. C. 



Hab. E. Australia, Van Diemen's Land, New Zealand, and New Caledonia. Trunk 

 attaining 30-35 ft. ; fr. 2-3 yrds. 1., 2-2^ ft. across ; stems densely clothed at the base with 

 silky yellowish-brown fibres ; segm. often so narrow that the two rows of sori are quite 

 contiguous. 



8. D. chrysotricha, _ Moore ; arborescent ; fr. bipinnate ; lower pinnce 12-18 in. 1., 

 6-9 in. br. ; pinnl. linear, quite cut down to the rachis except towards the apex ; 

 segm. linear-oblong, deeply toothed, ^ in. 1., 2 lines br., bluntish ; main rachis 

 clothed with a thick coat of shining yellowish-brown hairs at the base ; rachis of 

 the pinnae and pinnules asperous and rather thickly tomentose ; texture coria- 

 ceous ; fertile pinnl. slightly contracted ; sori 2 to 6 to a lobe, | a line across ; 

 valves suborbicular. Balantium chrysotrichum, Hassk. Cibotium speciosum, 

 Blume. D. Blumei, Mett. D. magnificum, De Vriese. 



Hab. Java, ascending to 11,000 ft. Probably this is D. Javanica, Blume (Hk. Sp. 

 Fil. 1. p. 78), and if so, this is the oldest name. 



nate ; lower pinnce 12-18 in. 1., 6-9 in. br. ; pinnl. linear, quite cut down to the 

 rachis in the lower part ; segm. ^ in. 1., less than | in. br., linear-oblong, acute, 



