Natural Orders .] 
APPENDIX. 
565 
constitutes one of the peculiarities of its vegetation. About 140 species 
have already been observed, the greater part of which are found in the 
principal parallel ; t he oder, however, continues numerous at the south 
end of Van Diemen’s Island, where several genera appear that have not 
been met with in other parts ; within the tropic very few species have been 
observed, and none with capsular fruit. 
Epacridece, with the exception of two species found in the Sandwich 
Islands, are confined to the southern hemisphere, several species have been 
observed in New Zealand, a few in the Society Islands, and even in the 
Moluccas ; the only species with capsular fruit found within the tropic is 
Dracophyllum verticillatum, observed by Labillardiere in New Caledonia; 
and the only plant of the family known to exist in America is an unpub- 
lished genus also with capsular fruit, found by Sir Joseph Banks in Terra 
del Fuego. 
The sections into which I have divided this order differ from each 
other in two remarkable points of structure. The Styphelece , as they may 
be called, having a valvular or very rarely a plaited aestivation of the 
corolla, and a definite number of seeds; while the Epacridece, strictly 
so called, have along with their indefinite number of seeds and capsular 
fruit, a corolla with imbricate aestivation. I have formerly* pointed out 
what seems to be the natural subdivision of this section, depending more 
on the differences of insertion in its leaves than on characters derived 
from the parts of fructification. 
LABI AT AG and VERB ENACEAE appear to me to form one na- 
tural class, the two orders of which gradually pass into each other. Terra 
Australis contains several remarkable genera of both orders, and chiefly in 
its principal parallel. Chloanlhes f is the most singular among Verbenaceae, 
having, with the fruit of that order, entirely the habit of Labiatse. 
Westripgia and Prostanthera, with the genera nearly related to each 
ofthese, are the most worthy of notice among Labiatse, all of them are 
limited to Terra Australis, and they are found chiefly in its principal 
parallel, but Westringia and Prostanthera abound also in Van Diemen’s 
Island, and extend, though more sparingly, in the opposite direction as far 
* Prodr. ft. nov. holt. 536. 
f Bauer illustr. tab. 4, 
