10 ADIANTUM. 



texture, without the trace of a petiole, and their thickened margins, are 

 (juite peculiar. The plant is of a firm and rigid habit, with a stout rachis, 

 the upper part of which is wholly concealed by the arrangement of the pin- 

 na*. I regret that the exact locality of this Fern in Mexico is not stated. 



17. A. lobatum, Pr. ; "fronds oblong bipinnate pinnate at 

 the apex glabrous, pinna) and pinnules alternate petiolate 

 oblong lunate rotundate lobato-incised crenulate, terminal 

 ones subtrilobed, sori solitary lunate, involucres reniform."' — 

 Presl, Reliq. Hmik. p. 62, /. 10,/ 5. 



Hab. Mexico, Hcenke. — In size and general aspect tliishas so much the 

 appearance of A. Galeottianum (from the same country) that I have been 

 almost templed to make that a synonym of the present species ; but no- 

 thing is said about the texture, which in our A. Galeottianum is thick 

 and subcoriaceous, and where, moreover, the pinnules are much more 

 orbicular, and the sori more numerous and less lunate. Presl has 

 omitted the present species in his ' Tent. Pleridograph.' Professor Kiuize 

 refers it to .4. Chilense. 



18. A. Galeottianum, Hook. ; frond broadly lanceolate (a 

 span long) pinnate lowermost pinnae again pinnate, pinnae 

 subopposite all petiolate cordate or subrotund almost exactly 

 equilateral coriaceous emarginate or truncated rarely sub- 

 cuneate at the base the rest obscurely lobed with narrow sori- 

 ferous sinuses, the margin slightly thickened all round, invo- 

 lucres reniform-cordate subcoriaceous situated at the bottom 

 of the shallow sinuses, racliis and stipes rather stout ebeneous 

 glabrous. (Tab. LXXX. B.) 



Hab Mexico, near Oaxaca, elevation 3000 feet, Galeotti, n. 6561. — 

 A very distinct species of Adianlurn, and not taken up by Martens and 

 Galeotti in their Syn. Fil. Mexic. Indeed, it appears to belong to a col- 

 lection gathered subsequently, if I may judge from the high number it bears. 

 Its nearest affinity is perhaps with our A. Shepherdi, but the arrangement 

 and insertion of the pinnae, as well as their shape, are very different ; and 

 the almost exactly equal sides of these pinna) affords a striking character, 

 especially among the coriaceous species of the Genus ; but is not iinfrequent 

 in some of the thin herbaceous kinds, such as A. Chilense and scabrum, 

 and there is an approach to it in the A. dclloideuui among the species with 

 a firmer texture. 



19. A. Ruizianum, Kl. ; " frond pinnate, pinnae large re- 

 niform shortly attenuated into a petiole crenato-lobate, stipes 

 and rachis compressed brown-black glossy glabrous, sori orbi- 

 cular chestnut-brown glabrous." KL in Linn<Ba, xviii./?. 551. 



Hab. " Andes of Peru, Hh. Ruiz, n. 26. — A foot high. Pinna an inch 

 and a half, petioles an inch long, both glabrous ; lobes 1^ line long.'' Kl. 

 No remarks are given on the affinity of this species. 



20. A. diaphanum, Bl. ; root fibrous, fronds (4-5 inches) 

 not rooting oblong attenuate pinnate lowermost ones some- 



