50 13. DICKSONIA, EUDICKSOXIA. 



naked on both sides, not glaucous beneath ; veins prominent ; lateral veins of the 

 segments simple or forked ; sori 2 to 8, rows with a broad space between them ; 

 inner valve narrower than the outer, oblong. Ilk. Sp. Fit. 1. p. 84. t. 

 29. C. 



Hab. Oahu and Honolulu, Sandwich Islands. 



4. D. (Cibotium) Chamissoi, Hook, and Baker ; fr. tripinnate ; lower pinnae 

 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 1 2 to a lobe ; voices unequal, 

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



Hab. Oahu, Sandwich Islands. 



i '" 1 5. D. (Cibotium") Schiedei, Baker; fr. oblong - deltoid, tripinnate; rachises 

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

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

 lanceolate, 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. tip. Fil. 1. 

 p. 84. t. 30. A. 



Hab. Mexico. Caudex 1045 ft. high. Sori at most 4-6 to a segment, not crowded. 



Eudicksonia. Involucre distinctly 2-valvcd, the outer valve formed ly the apex 

 of a segment. Sp. 6-17. 



6. D. arborescens, L'Herit. ; arborescent; fr. bipinnate ; lower pinnae 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 ; st. under 1 ft. 1. ; scales fibrous, very 

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

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

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

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

 green, glabrous; sori 6-10 to lowest segment, \ lin. br. Hk. Sp. Fil. I. 

 p. 66. 



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

 frond. Caudex 30-35 ft. 



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

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

 aegm. 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 ; 



