Ferns of British India and Ceylon. 401 
Himalayas and Khasya, from 500-4,000 feet, and Mr. Clarke 
makes it a separate variety, under the name of longifrons ; it, however, 
graduates into the type, I beUeve it is not separated at Kew, nor 
are there any characters to distinguish it ; they both have the costa 
very red sometimes, Mr. Clarke also gathered small specimens with 
simple fronds (not in fruit, however). 
(Mr. Clarke is quite wrong in referring Gymnopteris costata, var. 
deltigera, to this genus, it has quite different venation.) 
GENUS LXXVI.— ANTROPHYUM. {Kaulf,) 
{Antron, a cave, hollow ; phyo, I grow.) 
Sori reticulated or interrupted, carried 
along the veins in line, the receptacles 
immersed and forming grooves, or super- 
ficial ; veins uniform reticulated ; fronds 
adherent to the caudex, simple, with or 
without a defined midrib, fleshy-coriaceous 
in texture, all the species closely allied. 
I. Antrophyum reticulatum. 
{Kaulf.) Stipe none or very short, the frond 
being decurrent down to the base ; fronds 
6-15 inches long, by i-i^- inch broad, 
linear- lanceolate or acuminate, very gradu- 
ally narrowed downwards : midrib none 
or sometimes present towards the base of 
the frond, the areoles very long and 
narrow and distinctly raised on the upper antrophyum reticula- 
surface ; sori immersed, sometimes con- tum. {Katdf.) 
fluent. Kaiilf, Fee, 2i^-d Mhfi. Fo2ig. 14. Bedd. F. S. I. t. 231. 
Ant. coriaceum, Wall. Cat. 43. Ant. semicostatiim (^/.), Zrt^<?/^. 
Syn. Fil. 393. 
All the South Indian, Ceylon, and North Indian specimens 
seem to me to belong to one species ; "coriaceum" is said to differ 
27 
