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P O L Y P O D I U M T R ID A C T Y L UM.
íT LICES .— G y h a t í e . B r . P o l y p o d i a c e æ . K a u lf. F i l i c e s v e ræ . Willd.
Gen. C h a r . P T E R J S , Linn. S o r i subrotundi (seriati, sparsi vel conferti). Involucrum
nullum. B r .
P o ly p o d ium tr id a c ty lum ; fronde digitato-tripartita, laciniis lanceolato-acuminatis integerrimis reticulatis
glabris, soris sparsis, stipite elongato.
Polypodium tridactylum. JFall. Cat. o f P L in M u s . E . I . C. N o . 315.
PIab. In montibus apud Sylhc t. N . W a llich , M .D .
Caudex repens, crassitie pennoe anserinoe, subtortuosa, radículas numerosas ramosas fiexuosas emittens.
S tip ite s digitales ad semipedalem, erecti, semiteretes, glabri, omnino nudi.
F ro n s palmaris ad spithamæam, simplex, profunde digitato-tripartita, laciniis lanceolatis, attenuatis, integerrimis,
costatis, reticulatis, utrinque glaberrimis, membranaceis, intermedia longiore, lateralibus erecto-patentibus,
subflexuosis.
S o r i sparsi, hemisphærici, venulis secundariis inserti.
Capsidæ subglobosoe, compressæ, reticulatæ, lato-annulatæ, annulo fere completo, longe pedicellatoe.
S emina retiiformin, albescenti-pellucida.
Fig . 1. Po rtio frondis cum soris. f . 2 . Capsuloe. f. 3. Semina;— m a g n .a u cl.
Perhaps th is species is more nearly allied to som e o f the varieties o f P . ph ym a to d e s than to any
o th e r ; but the fronds are by no means coriaceous, nor are the sori at all immersed. P . Stemionitis
Cav., according to the description, differs in the sori b e in g arranged in a series.
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