542 
APPENDIX. [ Botany of Terra Australis, 
for its thickened filaments and flat leafless stems, are found only within 
the tropic. The remaining genera of the order have not yet been observed 
in New Holland. 
Magnoliaceae and Dillcniacese appear to me to form two orders of 
one natural, class. These orders are sufficiently distinct from each other in 
most cases, both in fructification and habit ; they are not, however, easily 
defined. The ovaria, which are indefinite in number in the greater part of 
Magnoliaceae, are also so in certain Dilleniaceae ; there are likewise exam- 
ples in both orders, in which they are reduced to unity ; and the stipulation 
of Magnoliaceae exists in Wormia. 
PI 1 FOSPOREiE.* Authors have generally been disposed to con- 
sider 1 ittosporum, Bursaria, and Billardiera, as belonging to Rhanmeae or 
Gelastrinae, from both of which they are certainly widely different ; and they 
appear to me to constitute, along with some unpublished Australian 
genera, a very distinct natural family. Pittosporeas form a small tribe 
chiefly belonging to Terra Australis, where most of them have been ob- 
served in the principal parallel ; but certain species of all the published 
genera exist at the south end of Van Diemen’s Island, and both Pitto- 
sporum and Bursaria are found within the tropic. Pittosporum, the only 
genus of the order which is not confined to Terra Australis, has the most 
extensive range in that country, and has been found in many other parts of 
the world, namely, New Zealand, Norfolk Island, the Society and Sandwich 
Islands, the Moluccas, in China, Japan, and even Madeira. It has not, 
however, been observed in any part of America. 
POLYGALEAE. + The curious observation of Richard, that the arillus 
* PiTTOSPOREiE. Calyx 5-ph, (ram l-ph. 5-fid.) eestivatione imbricata. Petala 5: 
unguibus conniventibus, nunc cohaerentilms ; laminis patulis, aestivatione irnbricatis. 
Stamina 5, hypogyna, distincta cum petalis alternantia. Ovarium loculis placentisve2-5 
polyspermis : Stylus 1 : Stigmata nuinero placentarum. Pericarpium capsulare vet 
baccatum, loculis polyspermis quandoque incomplctis. Embryo minutus, prope umbilicum, 
inclusus albumine carnoso. Frutices vel Aibores. Folia simplicia, alterna, exstipulata. 
Flores terminates vel axillares, quandoque poly garni. 
t Polygale,®. Calyx 5-ph. raio 5-fid. aestivatione imbricata : saepius irregularis : fo- 
