~I 
CHRISTENSEN, ON SOME SPECIES OF FERNS. 
3. Var. uliginosa (Phil.) 
Syn: Lomaria uliginosa Philippi, Linnaea 29: 105, 
1857; Blechnum uliginosum C. Chr. Ind. 160 — B. alpi- 
num var. elongata Mett. Fil. Lechl. 3: 15. 
Large; sterile leaf about 30 em. long, including the long, 
black stipe, which is 12—15 em. long; lamina downwards 
long attenuated with several free, reduced, remote pinnz; 
costa blackish brown. 
Chiloé: Ancud, n:r 133, 8. 7. 1908. 
Blechnum Schottii (Cotta) C. Chr. comb. nov. 
Syn. Lomaria Schottii Colla, Mem. Ac. Torino 39: 44 tab. 
72. 1836. — L. bella Philippi, Linnaea 29: 104. 1857 — L. 
attenuata. Johow, Helechos Juan Fernandez 29—? L. fernan- 
deziana Philippi, Anal. Univ. chil. 1873: 105 (non vidi) — 
? L. L'Herminieri Johow, ]. c. 30 (L. cherminieri ex err. typ.). 
Juan Fernandez: Masatierra, Portezuelo de Villagra 
n:r 442. 23. 8. 1908. 
Im my Index I referred L. Schottii Colla with doubt to 
B. tabulare, but it is certainly identical with L. attenuata 
Johow and of other authors, who have written on the ferns 
of Juan Fernandez. The material collected corresponds ex- 
actly with the figure of L. Schotti? and belongs to L. attenuata 
Willd. as confined in Syn. Fil. 176. In Corra' figure the 
segments appear to be finely toothed, which by the first 
glance seems to be the case also in our specimen, but the 
margins are as a fact fully entire and reflexed, while the tips 
of the Veins are raised on the upper surface in small acute 
papillae or pustules, which protrude on the reflexed margin 
and may be mistaken for teeth. JoHow described his L. bella: 
»pinnis integerrimis, superius punctis elevatis, a nervorum 
extremitate formatis ornatis»; his species is then certainly 
identical with B. Schottii. These papille can be found in all 
the forms referred by BAKER to L. attenuata Willd. and in 
other allied species, but nowhere I have seen them so distinct 
as in B. Schottii. They are described and figured by METTE- 
NIUS (Fil. Lips. 64 tab. 3 fig. 1—6, tab. 28 fig. 17—19) and 
are apparently a kind of hydathodes. In the interior of the 
pustule is a cave, which is surrounded by the terminal tra- 
cheids of the vascular tissue of the vein and by peculiarly 
