TAB. XLin. 



ASPLENIUM (AtHYEIUM) MEDIUM, Carm. 



Caudice "6-7 uncias longo," stipitibus 5-6 unciam longis 

 stramineis basin versus incrassatis paleis longissimis angus- 

 tissimis ferrugineis flexuosis obsitis, frondibus spithamseis 

 rigide subcoriaceis deltoideis acutis bipinnatis, pinnis ssepe 

 oppositis horizontalibus approximatis sessilibus 3 uncias 

 longis ovato-lanceolatis, pinnulis J-f unciam longis lato- 

 lanceolatis sessilibus pinnatifidis acutis vix auriculatis seg- 

 mentis ovato-oblongis serratis, venis pinnatis dichotomis, 

 soris copiosis, involucris membranaceis reniformibus sinua- 

 tis margine erosis, rachi universali crinita. 



Asplenium medium, Hook. Sp. Fil. 3. p- 228. 



Aspidium medium, Carm. in. Linn. Trans. 12. p. 311. 



Aspidium intermedium, Carm. Mss. in Herb. Hook. Athy- 

 rium, Moore. Ind. Fil. p. 96. 



Hab. Tristan d'Acunha, on the Table-land ; Dr. Carmickael, 

 in Herb, nostr. 



A very distinct species, peculiar, as far as yet known to 

 the island just mentioned. Its discoverer has noted, " stem 

 (caudex) about 6 inches high, crowned with a circle of fronds 

 from 9 to 12 inches high." 



Fertile plant ; nat. size. Fig. 1. Pinnule with sori. f. 2. 

 Single sorus. /. 3. Setiform scale from the stipes : mag- 

 nified. 



Ceki. 2. T. 43. 



