

TAB. LXVI. 



POLYPODIUM CRINITUM 



FILICES. — Gyratje. Br. 



Polypodiaceje. Kaulf. Filices verae. Willd., Spreng 



Gen. Char. POLYPODIUM, Sw 



nullum. Br. 



Sori subrotundi, (seriati, sparsi v. conferti) 



Involucrum 



Polypodium crinitum; fronde pinnata, pinnis lanceolatis pinnatifidis, laciniis oblongis obtusis sub 



inaequilateralibus integerrimis subtus costa nervisque subpubescentibus, stipite rachique setosis 



sons minutis. 



Polypodium crinitum. Poiret in Encycl. Bot. Spreng. Syst. Veget. v. 4. p. 5f 



\ 



Polypodium thelypteroides ? Desv. in Berl. Mag. 1811.^.317. Spreng. Syst. Veget. v.4.p.b6. 



(non Sieberi, Syn. Fil. n. 50.) 



Polypodium fusco-setaceum. Bojer. MSS. 



Hab. In insula Mauritii : in montibus excelsis, locis umbrosis. Bojer. 



Caudex subpalmaris, erectus, teres, hinc canaliculatus, nitidus, insigniter setosus, setis longis membranaceis, subu- 



latis, fuscis. 



Rachis etiam fusco-setaceus, versus apicem pubescens. 



Frons pedalis, circumscriptione 



ubpyramidalis, pinnata, pinnis plerumque oppositis, subhorizontalibus 



■ 



quadri- ad sex-pollicaribus, lanceolatis, breviter acuminatis, profunde pinnatifidis, fere omnino glabr 

 (setosa) nervisque pubescentibus, laciniis semiunciam longis, paululum falcatis, obtusis, oblongis v. 

 oblongis, inaequilateralibus, basi subaequalibus versus apicem sensim minoribus, penninervibus. 



Sori biseriales, nervis ultimis seu venulis prope medium utrinque inserti, parvi. 



Capsulce sphserico-subcompressse, annulo crasso cinctae, pedicellatae. 



Semina subreniformia, flavescentia, pellucida. 



Fig. 1. Pinnae lacinia, a dorso visa, cum soris. f. 2. Capsulae. f. 3. Semina: — magn. auct. 





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The difficulty of distinguishing many of the species of Fern by mere descriptions is, it must be 

 acknowledged, very great. In looking simply at the short character of P. thelypteroides given by 

 Desvaux above quoted, it is quite indicative of our present plant ; but then he describes it after- 

 wards as having " very few leaves (pinnae), of two inches and a half in length, the frond only five 

 inches long, and the stipes eight or nine inches in length :" in which respects, he tells us, it differs 

 from the P. crinitum of Poiret. Poirefs description, again, perfectly agrees with our plant in 

 every thing except in not having the sori inserted upon the extremities of the veins : they are 

 evidently inserted near the middle. 



Siebers P. thelypteroides must not be confounded with our plant, similar as it is in the structure 

 of its pinnse ; for it is pubescent on both sides, and the stipes, rachis, costa and nerves, are simply 

 pubescent, quite destitute of setae. 



