CHRISTENSEN, ON SOME SPECIES OF FERNS. 19 
Juan Fernandez: Masatierra: Valle Colonial, 22. 8. 
1908; Masafuera, 27. 8. 1908. 
If all Chilean aculeatum-forms without mucronate teeth 
are to refer to P. orbiculatum as described by Dr. CHRIST, 
the specimens from Juan Fernandez must be so named; 
still I am not convinced, that they are identical with DEsvavx? 
type, especially because Gay distinguished two species, P. 
orbiculatum and P. vestitum; our specimens no doubt belong 
to the latter, which, however, is not P. vestitum (Forst.) 
from New Zealand. 
Polystichum multifidum (Merr.) Moore. 
Patagonia occ. in valle fluminis Aysén, 15. 1. 1897, 
P. DusEN. 
var. Autrani Hicken, Anal. Soc. Cient. Argentina 63. 
1907 (reprint p. 14). 
Patagonia occ. Canal Messier, P:to Simpson, 7. 6. 
1908, n:r 297. — Smaller than the type and less scaly, lacking 
the large, black scales on stem and lower part of rachis. 
var. Dusenii n. var. 
Varietas in P. orbiculatum transiens, a typo differt: 
minus divisa, tripinnatifida vel tripinnata; pinnulis III. ordinis 
late obovatis, integris vel leviter dentatis. 
Patagonia occ. in valle fluminis Aysén, P. DusÉN n:r 
489, 15. 1. 1897 (type specimen in Naturhist. Riksmuseum, 
Stockholm) — Skyring, Isla Escarpada, SKOTTSBERG, 23. 4. 
908. 
An interesting form, in general habit much more re- 
sembling P. aculeatum or P. orbiculatum than P. multifidum, 
and Curist referred it to P. orbiculatum (Ark. f. Bot. 4: 
4) as a form analogous with var. hastulatum (Tenore) of P. 
aculeatum. It is, however, certainly a less divided variety 
of P. multifidum, with which it agrees in all other respects: 
its herbaceous texture, scales, size, reflexed lower pinnz and 
the elongated basal pinnules. 
Polystichum Berterianum (Corra) C. Chr. Ind. 579, 1906. 
Syn. Aspidium Berteroanum Colla, Mem. Ac. Torino 39: 
42 tab. 70. 1836; A. flexum Kze. Anal. 44. 1837; Johow, Los 
