13. DICKSONIA, §§§ rATANIA. 53 



19. D. cicutaria, Swartz ; rhizome creeping ; fr. bipinnate ; lower pinnce 12-18 

 in. 1., 6 in. br. ; pinnl. linear-acuminate, cut down in the lower part nearly or 

 quite to the rachis ; segm. ohlong-dcltoid, deei^y inciso-pinnatifid ; texture her- 

 baceous ; under surface and rachises naked or iinely hairy ; sori 2 to 12 to a 

 segment, placed at tiie base of the sinuses, about \ line across ; invol. cup-shaped. 

 — Hk. ,Sp. Fil. 1. 1). 7G. non Grisebach. D. tenera, Presl. D. ordinata, Kaulf. 

 Hk. Sp. Fil. \.p. 75. D. cornuta, Kaulf. Hk. Sp. Fil. 1. p. 76. 



Hab. Tropical America, from Mexico and the West Indies southward to Eio Janeiro 

 and Peru. — iSegments of the lower pinnules about 1 in. 1., ^ in. br. Closely allied to the 

 preceding, from whicli it differs by its sharper and more divided segments : these two 

 are bipinnate only, all the other ample-f ronded i)emzs<edi£E being tripinnate. 



20. Ti.apiifolia, Hook ; fr.iv'\-^\nua.i(i-Jowerpinncel2-\^'m.\.,G-Q\n.hT.; pinnl, 

 linear, quite cut down to the rachis throughout ; lowey- segm. deltoid or oblong- 

 rhomboidai, cut down very nearly to the rachis in the lower half, with deeply- 

 and sharply - toothed lobes ; texture herbaceous ; rachis and both surfaces 

 naked or nearly so, shining ; sori 2 to 12 to a segment, placed at the bottom of 

 the sinuses of the lobes ; invol. subglobose, cup-shaped, \ line across, —^/t. Sp. 

 Fil. l.p. 77. t. 2G. C. 



Hab. Andes of Ecuador and Peru. — A fully tripinnate plant with shining bright-green 

 subrigid fronds, the lowest segments 1 in. !.. i in. br. According to Grisebach, this is 

 the 3. cicutaria of Swartz ; but I have not seen West Indian specimens. According to 

 Kuhn, the plant intended by Swartz is Aspidium asccndens. 



21. D. rubiginosa, Kaulf. ;/r. tripinnate ; lower pinna; 12-18 in. 1., G-9 in, br. ; 

 ji?m?27. linear, quite cut down to the rachis throughout; lower segm. deltoid or 

 oblong-rhomboidal, deeply inciso-pinnatifid ; texture herbaceous ; rachis and 

 under surface finely tomentose ; sori 2 to 12 to a segment, placed at the base of 

 the sinuses ; invol. cup-shaped, subglobose, \ line across. — Hk. Sp. Fil. 1. 

 p. 79. t. 27. A. D. dissecta, Hk. Sp. Fil. 1. p. 77. jS. D. anthriscifolia, Kaulf. ; 

 segm. larger and more divided ; rachis and under surface nearly naked. — Hk. 

 S2).Fil. \.p. 7d.t. 27. B. 



Hab. Tropical America, from Mexico and the West Indies southward to Brazil and 

 Peru (both varieties), Bourbon and Mauritius. — A less elegant plant than Z>. apiifolia, 

 duller in colour, and with the under surface more or less hairy. Rachises shghtly 

 asperous ; lower segments ^-l in. 1. 



22. D. fiaccida, Swartz ; fr, tripinnate ; lotocr piiince 9-15 .in. 1., 6 in. br. ; 

 pinnl. lanceolate, quite cut down to the rachis throughout ; lower segm. ovate- 

 rhomboidal, bluntish, cut down nearly to the rachis three or four times on each 

 side, and the lobes again toothed ; texture herbaceous ; rachises densely tomen- 

 tose ; sori 2 to 8 to a segment, placed at the base of the sinuses ; invol. sub- 

 globose, cup-shaped, ^ line across. — Hk. Sp. Fil. 1. p. 77. 



Hab. Aneiteum and New Hebrides, Milne.- — Perhaps not distinct from D. nthijinosa, 

 with which it quite corresponds in the size and division of the frond, but the. habit is mora 

 rigid, and the rachises are densely tomentose throughout. The Cocos Island plant is 

 D. rubiginosa. 



23. D. moluccana, Blume ; fr. tripinnate ; lower pinnce 12-18 in. 1., 6-9 in br. ; 

 pinnl. linear-lanceolate, quite cut down to the rachis throughout ; lower segm. 

 oblong-rhomboidal, cut down to the rachis in the lower part, with blunt, oblong- 

 deltoid lobes ; texture subcoriaceous ; main and second, rachises prickly ; sori 

 2 to 12 to a segment ; i7ivol. subglobose, | line across. — Hk. Sp. Fil. l.p. 78. 



Hab. Java. — Resembling D. ruhiginosa in habit, but more coriaceous in texture, and 

 the stems thickly furnished with strong hooked prickles. Lower segments f-l in. 1., 

 ^ in. br. D. scandens of Blume, also from Java, which is probably D. Zippeliana, Kunze, 



