: 238 CHARACTERS OF TRIBES AND GENERA, 
. Europe inhabiting only Alpine situations. One species is 
found in South America and another has been discovered 
in Southern Africa, and one in Japan. 
As originally characterised, Woodsia comprises only 
three species, which are not only peculiar in their singular 
capillary indusium, but in their stipes having a distinct 
articulation some distance above its base. This latter 
character is similar to the elevated node of Oleandra, but 
otherwise the technical characters of the two genera are 
quite different. 
. la the section Physematium, the indusium is so truly 
calyciform, that, in determining affinities from that organ 
alone, they (with fronds only a few inches high) would ` 
be associated with the arboreous genus Cyathea, and 
on account of the sori of W. caucasica being apparently 
marginal, led to its being first described as a species of 
Dicksonia, 
* Woodsia vera. 
Stipes articulated. Indusium deeply laciniated, fringed with ` — S 
long hairs, 
Sp. W. Ilvensis, R. Br. (v v.); W. hyperborea, R. Br. 
(v v.); W. glabella, R. Br. : 
** Physematium. 
Stipes not articulated. Indusium complete, calyciform. 
W. polystichoides, Eat., Hook. 2nd Cent. Ferns, t. 2, —— 
(vv; W. elongata, Hook. Sp. Fil. 1,t.210.; W. caucasica, 
J. Sm. (Hymenocystis, Meyer, Hook. and Bauer. Gen. Fil., t. 3); 
W. mollis, J. Sm. (Physematium, Kze., Anal., t. 27) (v v.); 
W.obtusa ( Sw.) (Polypodium, Schk. Fil.,t.21; W. Perriniama, —— 
Hook. and Grev. Ic. Fil, t. 68) (v v.); W. guatemalensis, — 
