CHAEACTEES OF TEIBES 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 Clieilantlies. 

 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 tropics, 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 (Ldbill.) ; H. anthriscifolia, Presl. (Cheilan* 

 tlies commutata, Kze. ; Hook. Gen. Fil. t t. 67 A.} ; H. 

 nigrescens, Hook. H. parallelogramma, Hook. ; H. Pur- 

 dieana, Hook. 



Tribe 14. PHYSEMATEA (Plate 14). 



Vernation acaulose. Fronds varying from linear pinnate 

 to deltoid decompound. Veins free. Sori punctiform. 

 Indusium cucullate or calyciform. 



OBS. This tribe contains about twenty species ; and 

 although varying much in the size and circumscription of 



