CHARACTERS OF TRIBES AND GENERA. ` 9057 ` 
Ilust. Hook. and Bauer, t. 44, A ; Moore Ind. Fil., p. 83, 
B; J. Sm. Ferns, Brit. and For. ihe 129; Hook. Syn. 
Fil., t. 1, fig. 3 
Ons.— This genus is found on a VN species, a native 
of Juan Fernandez; it is said to have a slender arborescent 
stem, which seems to be correct, as shown by imported 
plants cultivated at Kew. 
In the “Species Filicum” Thyrsopteris is placed in the 
tribe Cyathea, but its terminal marginal sori, and general 
habit, clearly indicates its relationship to be with Dicksonia. 
It agrees with the following genus, Balantium, in having 
decompound fronds, differing only in the fertile segments 
being contracted into pedicels, each bearing a globose, 
. Borus, forming panicles, hence the name Panicularia given 
.. to the genus by Colla in 1836. 
Sp. T. elegans, Kze. (v v.) (Schk. Fil. Suppl., p. 3, t. 1.) 
139.—BaraxrriUM, Kaulf. (1824.) 
Dicksonia, Hook. Sp. Fil. 
Vernation fasciculate, decumbent, densely criniferous. 
Fronds deltoid, tripinnate, smooth; ultimate pinnules 
 dentate, multifid. Veins pinnate, venules free, simple or 
forked. Receptacles punctiform, terminal. Sori large, . 
transversely oblong, exserted in thryseform clusters. In- 
dusiwm bivalved, coriaceous, the two valves nearly equal, 
concave, reniform. 
Type. Dicksonia Culcita, L'Herit. 
lllust. Hook. and Bauer. Gen. Fil, t. 60 A.; J. Sm. 
Ferns, Brit. and For., fig. 126. 
Oss. The technical character of this genus differs but 
little from Thyrsopteris, but is distinguished by the caudex 
being decumbent. us 
.. The typical species is a native of the Azores and Madeira, — — 
