8 ADIANTUM. 



neons more or less fusco-pubescent. Kze. in Linnoia, 1848, 

 p. 221. A. obliquum, Sieh. Fl. Martin, n. 371. Kmilf. 

 En. Fil. p. 200. Hook. 8^ Grev. Ic. Fil. t. 190, not Wilid. 

 — ^. pinna) larger and broader. A. platyphyllum, Poep. Fil. 

 Exsicc. in Herb, nostr. (not Sic, nor Kze. in Anal. Pterid. 

 p. 31, /. 20). 



Hab. Tropical America, West Indies, Mexico. — jS. Amazon River, Poep- 

 pig in Herb, nostr. — This also appears a well-marked species : the under 

 side of the frond is, I believe, invariably glaucous. Myself and others had 

 considered it to be the A. obliquum of Willd., but as that author says 

 nothing of the glaucous hue, even in his full description, I the more rea- 

 dily follow Kunze in his name of A. Kaulfussii. I am satisfied that the 

 A. platyphylhnn from the Amazon, of Poeppig's Fil. Exsicc, is a mere 

 variety of this. 



13. A. obliquum, Willd.; frond oblong pinnate or very 

 rarely below subbipinnate, pinnae alternate approximate 

 short-petioled ovato-lanceolate obtuse or (especially the ste- 

 rile sublobato-serrated ones) acuminated obscurely costate 

 dark olivaceous green on both sides shining above, the mar- 

 gin at the upper base truncate and parallel with the rachis 

 the lower margin dimidiato-cuneate, sori numerous oblong 

 ciu'ved occupying the upper and lower margin to the very 

 apex rarely subconfluent, stipes and especially the rachis 

 rough with ferruginous down. (Tab. LXXIX. A.). — A. obli- 

 quum, Willd. Sp. PI. V. p. 429 (excl. syn. A. lucidum, Sw. 

 and Pteris lucida, Cav.) Klotzsch, in Linna^a,'s.\m.p. 550. — 

 ft. major ; pinnae longer and more acuminated. (Tab. 

 LXXIX. A. f. 1). 



Hab. S. America, Porto Eico and Caraccas, Bredemei/er in Willd. 

 British Guiana, Sir R. H. Schomburgk. Rich. Schomburgk, Klotzsch, in 

 Herb, nostr. n. 1175 and 1127. — /3. Columbia, Pacific side, Cuming, n. 1202. 

 Montague de Mahurie, Cayenne, Le Prieur (in Herb, nostr.) Tanaii, 

 near Para, R. Spruce, Coll. n. 39.* Guadeloupe, L'Hermonnier, Herb, nostr. 

 ex Herb. Paris. — My authority for this plant being the A. obliquum of Willd. 

 is my valued friend Dr. Klotzsch, who has made tlie ferns the main objects of 

 his study, and who is the able Curator of the Willdenovian herbarium. His 

 plant, communicated to me, I believe to be truly distinct from what has 

 been commonly taken for A. obliquum, although the chief character be 

 the entire absence of any glaucous tint. What I here make var. /3. has 

 longer and more acuminated pinnae, but does not appear to be otherwise 

 distinct. It would seem to be a rare species, and I have given all 

 the stations I know for it. It was not found in Mr. J. Smith's rich fern 

 herbarium. 



14. A. Cuben.se, Hook. ; caudex stout creeping scaly, 

 fronds (a span long) lanceolate not rooting, pinnae alternate 

 on short petioles chartaceous brown-green semiovate the 

 lower base above truncated and parallel with the rachis, su- 



