50 13. DICKSONIA, §§ EUDICKSOXIA. 



naked on both sides, not glaucous beneatli ; veins prominent ; lateral veins of tlie 

 segments sim^^le or forked; son 2 to 8, rows with a broad space between thein ; 

 inner valve xiarrower than the outer, oblong. — Hi:. iSp. Fil. 1. p. 84. t. 

 29. C. 



Hab. Oabu and Honolulu, Sandwich Islands. 



4. D. (Cibotium) C/iamissoi, Hook, and Baker ; fr. tripinnate ; lower 2^i»nce 

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

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

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

 veins of the segments iisually once-forked ; sori 2 to 12 to a lobe ; valves unequal, 

 outer one larger, suborbicular, inner one oblong. — Hk. iSp. Fil. 1. p. 83. 



Hab. Oabu, Sandwich Islands. 



6. D. [Cibotium) Scliiedei, Baker; fr. oblong - deltoid, tripinnate; rachises 

 stramineous, at first pilose; pinnce oblong-lanceolate, 1-2 ft. 1.; pinnl. linear- 

 lanceolate, ^-J in. br., short-stalked, cut down to the rachis below ; segm. close, 

 hmceolate, falcate, dentate ; texture subcoriaceous ; under surface glaucous, 

 glabrous; venules forked, or lowest pinnate; sori parallel with the edge, the 

 inner valve of the inv. overtopping the outer. — Cibotium Schiedei, Hk. Sp. Fil. 1. 

 />. 84. t. 30. A. 



Hab. Mexico. — Caudex 10-15 ft. high. Sori at most 4-6 to a segment, not crowded. 



§§ Eudicksonia. Involucre distinctlj/ 2-valved, the outer valve formed by the apex 

 of a segment. Sp. 6-17. 



6. D. arborescetis, L'Herit. ; arborescent; fr. bipiunate ; lower pituice 12-18 

 in. 1., 6-9 in. br. ; phuil. linear, cut down nearly or quite to the rachis; segj/i. 

 ^ 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 ; st. under 1 ft. 1. ; scales fibrous, very 

 dense dark purple-brown ; fr. rhonil)oid, tripinnate, 5-6 ft. 1., 2-3 ft. br. in centre; 

 rachises stramineous, naked or slightly crinite below; central pinnce 1-1^ ft. 1., 

 4-5 in. br. ; pinnl. sessile, linear, \ in. br. ; segm. oblong, fertile deeply inciso- 

 pinnatifid, sterile inciso-serrate, under -^ in. br. ; texture coriaceous ; both sides 

 green, glabrous ; sori 6-10 to lowest segment, ^ lin. br. — Hk. Sp. Fil. 1. 

 p. 66. 



Hab. East Australia and Van Diemen's Land. — Fully pinnate innnjB 30-40 to a 

 frond. Caudex 30-35 ft. 



8. D. chrysotriclia, Moore ; arborescent ; fr. bipinnate ; loroer pinnoe 12-18 in. 1., 

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

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

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

 the pinn:c and pinnules asperous and rather tliickly tomentose ; texture coria- 

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



