830 Sir J. E. Su1ru's Observations on Iris susiana of Linneus, &e. 
species cannot fail to ascertain ; and the I. susiana, being large 
and distinctly formed, is one of the best for the purpose. 
On another subject, quite unconnected with the above, I shall 
but slightly touch, and that rather in the form of an inquiry than 
a communication. Has any one ever adverted to the natural 
order of the Aquilaria, since Cavanilles and Jussieu published their 
very imperfect accounts of this genus? I cannot but suspect it 
to belong to the Euphorbie. Dr. Roxburgh has lately sent me 
some seeds of this plant in their capsules, evidently the same as 
Cavanilles bas figured, and 1 presume Sir Joseph Banks and 
others are supplied with them. The insertion of the parts, the 
nature of the little hairy tufts which are in the place of petals, 
and the configuration of the capsule, favour my opinion, which 
is strengthened by the acrid burning flavour of the seeds. As to 
its affinity to Samyda, I presume no one will support that opinion, 
nor does it appear on what grounds it has been advanced. I 
inclose two of the capsules, and shall be thankful "x any infor- 
mation concerning them. 
i I remain, &c. 
Norwich, June 15, 1812, _ x J. E. Smirk 
XX. De- 
