FLORA OF SOUTH AMERICA. 197 - 
Acrostichum simpler, Sw. Willd. sp. p. 5. p. 100. A. oxy- 
phyllum, Künze in litt. 1841. Woods of the Essequibo and 
Rupunoony, Schomburgk, n. 448.—Kunze appears to think 
this a new species, but it is certainly not distinct fro 
Jamaica specimens of A. simplex. | 
/20. E. glabellum. J. Sm. (n. sp.) frondibus lineari-lanceo- 
latis basi longe attenuatis glabris coriaceis stipite basi articu- 
lato, venis obscuris. British Guiana, Schomburgk, n. 447.— 
Allied to E. viscosum, but differs in being smooth, and in the 
evident articulation of the stipes. 
121. E. latifolium. J. Sm. Acrostichum latifolium, Sw. Willd. 
Lc. p.105. British Guiana, Schomburgk, n. 449 and 450.— 
I possess specimens of this species from several localities, 
and which vary much in the size of their fronds. Kunze con- 
siders n. 449 to be a distinct species, but on comparing it 
with the difference of fronds consequent on local circumstances, 
I hesitate to adopt his view. ; 
22. E. squamosus. J. Sm.  Acrostichum squamosum et A. 
muscosum, Sw. Willd. l. c. p. 104. British Guiana, Schom- 
burgk, n. 446.—I believe Acrostichum squamosum and mus- 
cosum of Sw. and A. lepidotum and A. tectum of Willd. to 
be one and the same species. 
Tribe PTERIDE®, J. Sm. 
423. Cheilanthes radiata. J. Sm. I. c. p. 159. Adiantum ra- 
datum, Linn, Sw. Willd. sp. pl. 5. p. 437. British Guiana, 
Schomburgk. 
_ 724 Adiantum phyllitidis, J. Sm. (n. sp.) frondibus pinna- 
Us, pinnis elliptico-lanceolatis acuminatis basi superiore 
rotundatis inferiore cuneatis, sterilibus remote crenatis, pe- 
tiolis decurrentibus, soris utrinque marginalibus continuis.— 
British Guiana, Schomburgk, n. 300.—This is a rather pecu- 
liar Adiantum, approsching in habit the simply pinnate forms 
= A. villosum ; but the circumstance of the petiole not being 
"rtieulated with the rachis gives to this species such a very 
stinet ang marked character, that, without the presence 
