CHARACTERS OF TRIBES AND GENERA. 997 
P. excelsa, Gaud. ; P. lata, Link. (v v); P. paleacea, Roch, 
(v v.) ; P. scabra, Bory.; P. Kingiana, Endl. (v v.); P. 
flabellata, Thunb. (v v.); P. straminea, Mett. (v v.); P. 
arguta, Ait. (v v.) ; P. tremula, R. Br. (v v.) ; P. Croesus, 
Bory. ; P. felosma, J. Sm. (v v.); P. nemoralis, Hook. and 
Bauer, t. 64 A. (?) Willd. 
tt Fronds tripartitely branched, deltoid, generally 
quadripinnate. 
P. deflexa, Link. (v v.); P. pellucens, Acard P. con- 
nexa, J. Sm.; P. decussata, J. Sm. (v v.); P. hirsuta, 
Hook. (usui Linn.; P. laciniata, Willd.) (v v); P a 
Griesbreghtii, J. Sm. in v.). 
The above species are widely dispersed, being found in 
the tropical and subtropical regions of both hemispheres. 
170.—Ornrrnopreris, Agardh. (1839.) 
Pteris sp. auct. ; Hook. Sp. Fil. 
Vernation uniserial, distant, sarmentum hypogeous, thick 
and fleshy, or epigeous and slender. Fronds tri-quadri- 
pinnate, deltoid, from 1 to 6 or 10 feet high, opaque, 
coriaceous ; ultimate segments entire or unequally lacin- 
iated. Veins simple or forked, the sterile free, the apices 
of the fertile transversely combined by the receptacle 
forming a linear sorus, furnished with a special, exteriorly 
attached, linear indusium, and also with an accessory in- 
. dusoid membrane, rising from the inner side of the recep- 
tacle, but often obsolete. 
Type. Pteris aquilina, Linn. 
Illust. Moore Ind. Fil, p. 30, fig. 5, 6; Hook. Sp. Fil, 
t. 141; Hook. Syn. Fil., t. 3. fig. 31 å e. f. 
Ups The sarmentose caudex and special aspect of 
