CATALOGUE OE EERNS. 
27 
Hoolc. Gen. Fit. t. 81 A. Chrysodium aureum, Fee. 
Acrostichum fraxinifolium, R. Br. — Tropics and subtro- 
pics of the Southern Hemisphere. 
43. FLATYCEEIUM, Besv.; Bl. 
(INeuroplatyceros, Fluk.. ; Fee. Acrosticlii sp., Auct.) 
Vernation articulate, rhizome obsolete. Sterile fronds sessile, 
oblique, reniform, depressed or elongated and subascending, al- 
ternately overlapping each other, forming an epiphytal, spongy 
mass, often 1-2 feet in diameter. Fertile fronds stipitate, rising 
from the sinus of the sterile, once or many times dichotomously 
, forked, 2-6 feet in length ; segments broad, obtuse, densely co- 
vered with stellated scales, coriaceous. Veins internal, compound 
anastomosing. Sporangiferous receptacle amorphous, occupying 
more or less of the under side of the segments, or on a sessile or 
petiolate lobe. 
1. P. alcicorne, Gaud. Acrostichum alcicorne, Sw. ; Bot. Reg. 
t. 262-3.- - East Indies, Malay Archipelago, and Australia. 
2. F, Stemaria, Besv . Acrostichum Stemaria, Beauv. — West 
Africa. 
3. P. grande, J. Sm. Acrostichum grande, A. Cunn. — Malay 
Archipelago and Australia. 
Tribe III. PTEMDEJE. 
Sori round or linear, marginal, intramarginal, or costal, fur- 
nished with a special or universal lateral indusium, which is pro- 
duced on the exterior side of the sporangiferous receptacle, some- 
times undefined or obsolete. 
Sect. I. CHEILAETTHEJE. 
Sporangia terminal. Sori round or oblong, distinct or late- 
rally contiguous and confluent, forming a compound linear sorus. 
Indusium marginal, special to each receptacle, or more or less 
linearly continued, and then common to two or more oUceptacles. 
