TAB. XLIII. 
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 spithammis 
rigide subcoriaceis deltoideis acutis bipinnatis, pinnis siepe 
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. Inil. Fil. p. 96. 
Hab. Tristan d’Acunha, on the Table-land ; Dr. Carmichael, 
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. f, 3. Setiform scale from the stipes : mag- 
nified. 
Cunt. 2. i, 13. 
