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CETERACH PEDUNCULATA 



FILICES.— Gyratje. Br. Polypodiaceje. Kaidf. Filices vera:. Willd 



Gen. Char. CETERACH. Sori lineares transversales. Indusia nulla. Willd. 



Ceterach pedunculata ; fronde simplici lato-lanceolata sinuato-crenata reticulata basi attenuata, 



fertili longe stipitata, soris e costa ad marginem frondis attingentibus. 

 Hab. Sylhet Ind. Orientalis, ubi legit D. Smith. Misit clariss. Wallich. 



Caudex repens, lignosus, tortuosus, pennae passerinae crassitie, subtus radiculosa, radicuiis e fibris ramosis descen- 



dentibus, quorum majoribus hirsutis. 

 Frondes steriles et fertiles ex eadem caudice, utraque stipitata. 



Sterilis : Stipes erectus, glaber, gracilis, nitidus, pallide fuscus hinc sulcatus, 3— 4-pollicaris. Frons 4—6- 

 pollicaris, lato-lanceolata, membranacea, fusco-viridis, apice acuminata, basi attenuata, decurrente, margine 

 sinuato-crenata, costa instructa venisque horizontali-patentibus, venulis anastomosantibus. 

 Fertilis : Stipes ut in sterili, sed triplo longior. Frons ut in sterili, sed magis angusta, crenata, substantiaque 

 firmiore. Indusium nullum. Sori lineares, intense fusci, in venis parallelis et cum iis alternantibus et totam 

 latitudinem e costa ad marginem occupantes. Capsulce sphaericae, sublonge pedicellatse, reticulatse, annulo 

 fere completo. Semina minuta, oblonga, vix angulata, fusca. 

 Fig. 1. Capsulae. f. 2. Semina: — magn. auct. 



How far the genus Ceterach merits to be distinguished from Grammitis must be left to be deter- 

 mined by future observation. Kaulfuss makes one of the characters to depend on the chafly scales 

 with which the fructification is covered, as in Ceterach Officinarum. These scales are totally 

 wanting in our plant ; but the sori are transverse, upon which appears to rest the main character 

 of the genus as distinguishable from Grammitis. 



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Grammitis again, according to Mr. Brown, has the sori "venula unica insidentes." In Ceterach 



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pedunculata they occupy each a number of veinlets or reticulations exactly intermediate between 

 the straight lateral veins. 



