TAB. CXLII. 
PTERIS BIAURITA. 
FILICES.—GvnaATx. Br.  PorvropracEm. Kaulf. | Frvrczs vere. Willd. 
GEN. CHan. PT'ERIS, Linn. Sori lineares, marginales, continui; capsulis sinu involucri insertis. 
Involucrum marginale, continuum, scariosum, intus liberum. Zr. 
PrEniIs Diaurita; glaberrima, fronde pinnata, pinnis lanceolatis attenuatis pinnatifidis, infimis bi- 
partitis, laciniis oblongo-lanceolatis subfalcatis obtusis serratis, stipite rachique glabris. 
Pteris biaurita. — Linn. Sp. Pl. p. 1534. Swartz. Syn. Fil. p. 98. (* excl. patria et syn. Retzii;" 
Jd.  WFild. Sp. Pl. v. 5. p. 384. Spreng. Syst. Veget. v. A. p. 74. 
Filix pinnulis lonchitidis &c. — P/um. 4m. p. 10. 4.14. — Fil. p.13. 1. 5. 
Has. In India Occidentali. Insula Sancti Vincentii. Zev. L. Guiding. E Jamaica, ubi vul- 
garis, miserunt Dom. Bancroft & Hisson. : In Insula Sancte Trinitatis. De Schach. 
Caudex repens, squamosus, squamis densis, fuscis, nitidis, hic illic radices ramosas, tomentosas emittens. 
Stipes pedalis, bipedalis et ultra, erectus, semiteres, nitidissimus, fuscus, hinc canaliculatus, laevis. 
Frons, circumscriptione late ovata, pinnata, pinnis 129—920, oppositis, remotiusculis, patentibus, lanceolatis, apice 
sublonge attenuatis, basi obliquis, sessilibus, profunde pinnatifidis, infimis bipartitis, breve petiolatis, laciniis 
oblique patentibus, paululum falcatis, oblongo-lanceolatis, basi latioribus, apice obtusis serratis marginibus 
soriferis. Substantia subcoriaceo-membranacea. Color intense viridis, nitidus.  Züachis universalis fusca, 
nitida, nuda. 
Sori anguste lineares, ad margines, non ad apicem laciniarum. 
Involucrum e margine tenui membranaceo, fusco laciniarum formatum, inflexum. 
Capsule fuscse, globoss, sublonge pedicellatze. 
Semina triangulari-globosa, rufo-fusca. 
Fig. 1. Capsule. f. 2. Semina:—magn. auct. 
A very common inhabitant of the West Indies, and we think liable to some variation in the 
relative length and breadth of the pinnz. 
The East Indian Preris nemoralis of Willdenow, and the Pr. amena of Kaulfuss, seem to approach 
very near to this, which is however confined wholly to the islands of the West Indies. 
