TADB. CLXIII. 
POLYPODIUM RIGIDUM. 
FILICES.—GrnATx. Br.  Porvropracxx. Kaulf.  Firicxs verm. Willd. 
GrN. CHaxz.. POLYPODIUM, Sw.  Sori subrotundi (seriati, sparsi vel conferti). | Znvolucrum 
nullum. Zr. 
PorvropiuM rigidum; fronde stricta lanceolata bipinnata, pinnulis ovato-rotundatis acutis sub- 
petiolatis, marginibus reflexis denticulatis rigidis, subtus stipite rachique paleaceis. 
Has. In fissuris rupium ad verticem montis Pichincha, Andium Peruvianorum. D. Prof. 
Jameson. : 
Planta caespitosa (Jameson). 
Stpes digitalis, rufo-fuscus, nitidus, squamosus, teres, hinc sulcatus. 
Frons spithamzseus et ultra, strictus, circumscriptione lanceolata, bipinnata. | Pinne lanceolatse, obtuse.  Pinnule 
arcte insertze, rigide, orbiculari-ovatee, acute, brevissime petiolatze, margine reflexze, inzequaliter denticulatee, 
supra convexze, intense virides; subtus concavze, pallidiores, pilis vel paleis angustis, nitidis, fuscis adspersee. 
Fachis universalis partialisque valde squamoso-paleacea, paleis vel squamis rufo-fuscis, nitidis, sepe laceratis. 
Sori pauci, 2—5 in singula pinna, subglobosi. 
Capsule sublonge pedicellatze, fuscae, annulatse. 
Semina subglobosa vel ovalia, intense flavo-fusca. 
Fig.1. Pinna cum soris. f.2. Capsule. f. 3. Semina:—magn. auct. 
The habit of this plant is more that of a /Vephrodium than of a Polypodium ; yet, upon the closest 
examination, and in the most perfect state of the sorus, we can find no trace of an involucre. 
The only specimens we have seen are those gathered by Professor William Jameson. 
