CHARACTERS OF TRIBES AND GENERA, 
oie) 6. polyodon, Forst. (v v.); A. faleatum, Lam. 
(v v.) ; A. caudatum, Forst. (v v.); A. paleacum, R. Br. 
(v v.). 
11. Erosum Group (Tarachia, Pr.) 
Fronds bi-tripinnate, decompound, rarely linear or simply 
Jorked; segments rarely otherwise than cuneiform, with 
erose apices; venation often flabellate, the costa being 
undefined or evanescent, | 
A. septentrionale, Schk. (v v.) (Aoropteris, Link.); A. 
germanicum, Weis. (v v.); A. Seelosi, Siebold (v kä 
A. Ruta-muraria, Linn, (v v.) ; A. cuneatum, Lam. (v v.); 
_ A. preemorsum, Sw, (v v.); A. fureatum, Thunb. (v v.); A. 
 laserpitiifolium, Lam. (v v); A. dimidiatum, Sw. (v v.) 
(A. zamicfolium, Lodd.); A, contiguum, Kaulf. (v v.) ; A. 
 €rosum, Linn. (v v.) ; A. nitidum, Sw. (v v.). p 
Sect. 4.—Actiniopreris, Link. 
_ Fronds stipate, flabellate, 6 to 8 inches high, rigid ; segments 
linear rachiform. Veins radiating and dichotomous. 
_ A. radiatum, Sw. (v v.). = 
Oss.— This is a remarkable Fern, of which Sir William 
Hooker says, “perfectly sui generis. Even its place in the 
Fern arrangement is doubtful. The frond is in no way 
foliaceous, but rachiform in its divisions, and, before ex- 
Pansion, it is, as it were, refracted (not circinate) upon the 
Stipes, and in appearance then, and even when fully _ 
developed, very much like some small Chamcerops among 
the Palms,” ; 
Although such is the view of this Fern, taken by Sir 
m. Hooker, I nevertheless do not find sufficient character - 
*Yond its habit, to separate it from Asplenium. lt is 
