ADIANTUM. 15 



different), " nov A. caudatiim, S\v., nor fla(/elliferuin, Roxb. n. 7t>,'' (for iu 

 those varieties of one and the same plant the fronds, and, especially, the 

 stipes, are more or less clothed with fulvous hairs or chaff) : " it differs from 

 all iu the inteffrity of the pinnae.'' On these grounds I give it as distinct, 

 though we need more copious specimens to see that it does not pass into 

 caudatum. The texture is more truly membranous than in that species : 

 the nerves are the same, but though cons))icuous from the pellucid nature of 

 the parenchyrae, they are not prominent on the surface : the fertile pinnae 

 scarcely exhibit an appearance of lobes; and the contiguous sori form a 

 pretty even line at the edge. 



28. A. calcaremn, Gardn. ; fronds a span long pinnate ob- 

 long or lanceolate tapering rooting and proliferous at the ex- 

 tremity, pinnae membranaceous nearly sessile upper ones 

 dimidiate subtriangular, lower ones flabellate all deeply cut 

 into oblong or cuneate narrow emarginate lobes, involucres 

 reniform occupying the notch on the lobes, stipes and rachis 

 ebeneous glabrous the latter rooting. — Gardn. in Hook. Ic. 

 Plant. V. t. 467. 



Hab. In clefts of calcareous rocks near Natividade, Province of Goyaz, 

 Brazil, Gardner, n. 3551. — Although approaching to A. filifnrme, and to 

 small specimens of A. dolabnforme, this appears really distinct, and, but 

 for the tender, membranaceous and glabrous fronds, it resembles the East- 

 Indian A. caudatum, which has the lower pinnae sometimes flabellate. 



29. A. pumilum, Sw. ; "frond (small) pinnate, pinnae sub- 

 rotund serrulate terminal one larger trapezoid, sori nearly so- 

 litary on the superior margin." — Sw. Fl. Ind. Occ. \\\. p. 1703. 

 Willd. Sp. PI. V. p. 431. Mart. Ic. Plant. Crypt. Brasil. 



p. 94, tab. rj6,f. A.—Plukn. Aim. t. 251,/. 4 {" hand male;' 

 Mart.) 



Hab. Trunks of old trees and shady rocks, Jamaica, rare, Swartz. — This 

 little Adiantum is quite unkown to me. I have seen nothing that corre- 

 sponds with it from Jamaica, the only recorded station, unless in call- 

 ing it a " planta Antillana," Martins should intend it to be understood as 

 inhabiting the Antilles generally. The figure of Plukenet, quoted by 

 Swartz and Martins, is recorded by the latter as " baud male." To me 

 that figure, destitute of fructification, has more the habit of an Asple- 

 nium than of an Aspidium ; and it is unfortunate that, although Mar- 

 tius describes the fructification, he does not represent it, nor say from 

 what source his specimens were derived. He gives the figure and 

 the full character, to show its affinity to, as well as the distinguishing 

 character of, his A. delicatulum ; but it does not help us to understand 

 Swartz's pumilum. If it has, as Swartz and Martins describe (though not 

 so figured by Plukenet), a filiform, creeping caudex, it cannot be closely 

 allied to Martius's A. delicatulum. 



30. K.Jiliforme, Gardn.; fronds a span or more long pin- 

 nate lanceolate tapering almost all rooting and proliferous at 

 the extremity, pinnae membranaceous small alternate petioled 

 distinct rather obliquely and broadly cuneate lobed and fim- 



