540 
APPENDIX. [ Botany of Terra Australis. 
The natural orders in the Genera Plantarum of Jussieu are exactly 
100 ; subsequent observations of Jussieu himself and of other botanists 
have considerably encreased their numbers, so that in the lately published 
Theorie Elementaire de la Botanique of Decandolle they amount to 145. 
The plants of Terra Australis are referable to 120 natural orders, 
some of which are not included in Decandolle’s list. 
On such of these as either contribute largely to form the mass or 
the striking peculiarities of the Australian vegetation, I proceed to offer a 
few observations, chiefly on their geographical distribution, and more re- 
markable points of structure : taking them nearly in the same series in 
which they are given by Decandolle in the work already referred to. 
MALI ACL/E. rhe Malvaceae may be considered as a class including 
several orders, namely, Malvacea of Jussieu,* Sterculiacece of Ventenat,f 
C Menace as of Du Petit Thouars,^ Tiliacece of Jussieu, § and an order 
very nearly related to the last, and perhaps gradually passing into it, 
but which I shall, in the mean time, distinguish under the name of 
Bultneriacece 
Of the Malvacca strictly so called, upwards of fifty species have been 
observed in Terra Australis, where the maximum of the order appears to 
be within the tropic. In the principal parallel Malvacete are more abun- 
dant at its eastern than its western extremity ; and at the south end of Van 
Diemen’s Island two species only have been observed. There is nothing 
very peculiar in the structure or appearance of the New Holland plants of 
this family ; most of them belong to genera already established, and several 
of the species are common to other countries. 
BUI I’M JHAf E. U. 8 1 he Australian portion of Bultneriacecs 
* Gen.pl. 271. f Malmais. 91. J Plant, des isles d'Afrique, 46- 
|| Gen.pl, 289. 
If ButtnbriacEvE. Calyx I-ph. 5-fid. apqualis, roarcescens, sestivatione valvata. 
Petal a, 5 : vel basi saccata superne varie producta; vel minuta squamuliformia ; quan- 
doque rtulla. Stamina hypogyna, definita: Filamenta antherifera cum luciniis ealycis 
alteraantia, simplicia, vel 2-3 connata ; sterilibus quandoque alterpantibus. Ovarium 
3-5-locuJare, loculis 2-polyspermis, ovulis erectis: Styli 3-5, smpius connati: Stigmata 
