12 ADIANTUM. 



22. A. dejlectens, Mart. ; " rhizoina simple short, fronds 

 pinnate sometimes rooting and gemmiferous at the extremity, 

 petioles paleaceous at the base and as well as the rachis 

 black glabrous, pinnae transversely oblong or trapezoid, pos- 

 terior sides rectihncar or with the interior side shorter 

 rounded entire, anterior sharply toothed entire or here and 

 there inciso-lobate, sorophorous lobules 1-5 orbicular-ob- 

 long." Mart. Ic. Plant. Crypt. Brasil. p. 94 {note). 



Hab. Roiiph rocky banks of the Tapajoz, at Santavem, Province of Para, 

 Martins. — " Plant a span long. Fronds erecto-patent or arcuato-deflexed, 

 rooting and producing new gemmae. Pinnce alternate, about twenty, 

 lowermost 4-6 lines long, 2-3 lines wide, decidedly inciso-lobate, upper 

 ones gradually decreasing in size and less incised. In habit very near A. 

 urcuatum, Sw.'' — As the A. arcuatum, Sw. is now acknowledged to be the 

 same as A. lunidatum, and as A. lunidatum is unquestionably a Brazilian 

 plant, may not this be a state of it ? 



23. A. clolahriforme, Plook. ; frond oblong pinnate, pinna) 

 alternate rather long-petioled membranaceous obliquely sub- 

 rotundato-cuneate deeply cut into many narrow irregular ge- 

 nerally bidentate lobes, sori rotundate or reniform, stipes 

 and rachis ebeneous glabrous the latter often extended be- 

 yond the pinnae and proliferous. Hook. Ic. Plant, ii. t. 191. 



Hab. Natividade, Brazil, Gardner, n. 3553 ; Aracipe, on rocks in a 

 shady ravine, n. 2019, and between Canabrava and Franquirra, n. 2392. 

 Moist rocky places. Isthmus of Panama, Seeman. — An equally large plant as 

 A. lunulafMm, and as already observed, in Ic. PI., 1. c, approaching very 

 near to that species : but specimens sent by Mr. Gardner at different pe- 

 riods, and from diflerent localities, retain the above characters, i. e., the 

 lower and upper base of the leaflets are more nearly equal and straight, 

 giving a cuneate form, rounded above and deeply cut into narrow lobes, 

 with usually a tooth on each side the sorus. No such form appears in the 

 numerous specimens of A. lunidatum from the East Indies. It appears 

 to be not uncommon in some parts of Brazil, for Mr. Gardner observes 

 that between Canabrava and Franquirra it bears the vernacidar name of 

 " Fe^^ca,'' and is used in pectoral complaints. A resemblance to A. Ca- 

 pUlus- Veneris of the Old World no doubt suggested the idea to the early 

 Spanish colonists of its supposed virtues. Seemann's specimens from Pa- 

 nama are smaller and exhibit the same distinctive characters as the Bra- 

 zilian ones, but show an approach to A.filiforme, Gardn. 



24. A. rhizophorum, Sw. ; quite glabrous, fronds elongato- 

 lanceolate often tapering into a long rooting and proliferous 

 apex bare of pinnae, pinnae alternate short-petioled char- 

 taceo-coriaceous (brown when dry) semiovate the upper 

 base truncated and parallel with the rachis, superior margin 

 lobed lobes retuse soriferous shining above, on both sides 

 very minutely striated by the numerous compact veins, invo- 

 lucres reniform thick coriaceous, stipes ebeneous or red- 



