TAB. LXVIII. 





WOODSIA PERRINIANA. 



FILICES.— GYRATiE. Br. 



Polypodiace^. Kaulf. Filices verse. Willd., Spreng 



Gen. C 



TVO ODSIA 



Sori dorsales, subrotundi 



laciniatum (marg 

 elevato nullo. Br 



Involucrum calyciforme apertum 



e crinitum Br.) : includens Capsulas pedicellatas 

 (paucis verbis mutatis.) 



ptaculo communi 



Woodsia perriniana ; minutissime glanduloso-pilosa, frondibus bipinnatis, pinnis ultimis pinna- 



tifidis segmentis rotundatis bidentatis, 



soris submarginalibus, involucris subhemisphaericis 



demum laciniis patentibus dentatis, stipite subpaleaceo. 

 Alsophila perriniana. Spreng. Syst. Veget. v. 4. p. 125. 

 Woodsia sp. ? Torrey MSS. 



Hab 



Insula Sancti Thomse. P< 



Eboracensem). D. Barratt 



In America Septentrionali. Torrey (prope Novam 



Radix 



Stipes digitalis et ultra, glaber, nitidus, paleaceo-squamosus, paleis sparsis non raro deciduis. 

 Frons, circumscriptione lanceolata, ubique pilis minutissimis glandulosis subtus prsecipue obsita, bipinnata, pinnis 



oppositis, remotiusculis, secundariis oblongis vel oblongo-lanceolatis, pinna- 



primariis deltoideo-lanceolatis, < 



tifidis, laciniis rotundatis bidentatis, vel inferioribus rarissime iterum subpinnatifidis, laciniis ultimis bidentatis. 



Color pallide virens, pinnarum rachi g]an(\ii\oso } frondium inferne paleaceo. 

 Sori submarginales, solitarii, in singula lacinia ad dichotomiam venarum insidentes. 

 Involucrum infra sorum insertum membranaceum album primum hemisphaericum capsulas involvens, sed vertice 



aperto, demum in lacinias inaequales, patentes, denticulatas dehiscentes, laciniis subovatis, reticulatis, concavis. 

 Capsula sphaericae, breviter pedicellatae, annulo incompleto. 

 Receptaculum commune nullum. 

 Semina oblongo-rotundata. 



Fig. 1. Planta e D. Torrey. f. 2. Eadem e D. Barratt recepta: — magn 



f. 3. Portio pinnulae, cum 



f. 4. Sorus immaturus, involucro nondum expanso. f. 5. Sorus maturus. f. 6. Capsulae. f. 7. Semina 

 magn. auct. 





We had the good fortune to receive from our valuable correspondent Dr. Torrey, of New York, 

 an authentic specimen of the Alsophila perriniana of Sprengel, gathered in the island of St. Thomas, 

 and specimens of a Fern gathered near New York, which upon comparison prove to belong to the 



same species 



Afterwards Dr. Barratt sent it to us also from the United States. 



Sprengel has in some deg 



altered the 



g 



character of Mr. Brown's Alsophila 



clude the present plant : but as the original species of Alsophila emb 



tribe of Fern 



bo 



d quite different from our 



as well 



pect as in generic character, we have 



sidered it best to remove A. perriniana from that genus altogether. 

 It would be easy for us, seeing that it does not precisely accord with 



described 



of the 



Filices. to have invented a new one. 



But as our design is rather by a series of well executed 



fi^ures and descriptions to give a correct idea of the structure of the fructification of Ferns, which 

 may be employed in future for the formation of genera, than too hastily to constitute new ones, we 

 have preferred placing the present plant in the geni 

 similar ; and, except that the involucre is larger in 



Woodsia. Its habit, we think, is sufficientlv 



proportion to the 



covers more fully the capsule 

 the character of the fructifica 



d that, in a youn 

 is not a differenc 



d is not margined with hairs, there is not a 

 And we are not without an idea, that had the learned 



Brown himself been acquainted with the present Fern, he might have framed the character so as to 

 have included it also. 



