CHARACTERS OF TRIBES AND GENERA. 235 
slender prolonging epigeous sarmentum. In habit they 
agree with the section Phegopteris, but are technically 
distinguished by the sori being terminal, and produced in 
the axis of reflexed crenules or lobules of the incised mar- 
gin of the frond, in that respect analogous to the pteroid 
genus Cheilanthes, but the apparent indusium has no dis- 
tinct axis of attachment, being merely a reflexed changed 
crenule, also the habit of the species which I restrict to 
Hypolepis are widely distinct from those of true Cheilanthes. 
In some cases the inflexed crenule is not very evident, and 
it is then difficult to distinguish the species from Phegopteris, 
for instance such species as P. ornata, which by some 
authors is referred to Hypolepis. 
In Hooker's ** Species Filicum " 30 species are described, 
which in the Synopsis are reduced to 11. The following 
are the most well defined species. They are widely dis- 
tributed, being found in the tropies, and extending to 
the latitude of New Zealand in the South and Japan in the 
North. 
Sp. H. tenuifolia, Bernh. (v v.) ; H. repens, Pr. (v v.); 
H. amaurorachis, Kze. (v v.) ; H. distans, Hook. (v v.) ; 
H. rugulosa (Labill); H. anthriscifolia, Presl. (Cheilan- 
thes commutata, Kze.; Hook. Gen. Fil, t. 67 A); He 
nigrescens, Hook.; H, parallelogramma, Hook.; H. Pur- 
 dieana, Hook. 
Tribe 14.—PHYSEMATEJE. (Plate 14). 
Vernation acaulose. Fronds varying from linear pinnate 
to deltoid decompound. Veins free. Sori punctiform. 
Indusium cucullate or calyciform. 
Oss.—This tribe contains about twenty species; and 
although varying much in the size and circumscription of ` ` 
