CHARACTERS OF TRIBES AND GENERA. 199 
of the frond as in Polystichum anomalum ; in these cases 
the indusium forms a cucullate cyst. Judging from the 
whole aspect of the plant, and its anomalous fructification, 
it may be viewed as an abnormal form of the Aspidee 
above-mentioned; I therefore place it in the present 
sequence. 
Sp. T. Moorei, J. Sm., Ferns, Brit. and For. (v el 
B. Indusium orbicular or reniform. 
103. Poporrur, Fée. (1851.) 
Aspidium sp., auct.; Hook. Sp. Fi. 
Vernation uniserial, sarmentum slender. Fronds simple, 
elliptical lanceolate, margin entire or sinuose, l to 13 feet 
long (stipes long). Primary veins costeform, venules 
compound anastomosing, with free veinlets, terminating in 
the areoles. Sori punctiform, compital in two or more 
rows, or irregular between the primary veins. Indusium 
peltate. 
Type. Aspidium Singaporianum, Wall. 
Ilust. Fée., Gen. Fil., t. 93 A. fig. 1. 
Oss. Under this genus I include two species which 
differ from true Aspidiwm in having sarmentose vernation, 
and simple fronds. 
Sp. P. Singaporiana (Wall., Hook. and Grev., Ic. Fil., 
t. 26); P. sinuata, J. Sm. (Bathmium, Fée). 
Oss.— The first is a native of Singapore, and the other 
of Guiana. In the “Species Filicum " P. sinuatum stands 
as a synonym of Aspidium plantagineum, of which Sir 
W. Hooker says: “ My copious specimens from the West 
Indies and the continent of South America, have satisfied ` ` 
me that the Polypodium plantagineum (Jacq.) and our 
Aspidium plantagineum are one and the same Fern, varying 
