Ailantus 
glandulosa 
9) ARBORETUM NOTES. 
ZAN THOXYLACEE. 
it is nearer to the one edge than the other, and 
and attached to a slender placenta which runs 
as a rib along this nearer margin. The samaras 
are of a narrow-eliptical or oblong form, very flat 
and thin, like leaves, delicately veined, with 
thickened margins and very often tinged on one 
side with a fine red. 
Often only one samara follows each flower; not 
unfrequently two or three. I have not seen more 
than three. . 
Hooker and Bentham, in their Genera Plantarum 
refer this genus to Simarubea, instead of zan- 
thoxylee * 
The two orders are indeed very nearly related, 
both belonging to the Rutal alliance. The prin- 
cipal differences appear to be, that Zanthoxylee 
have glandular-dotted leaves, calyxes, &c., and 
have the carpels more or less united, not com- 
pletely distinct. 
In both these points Adlantus certainly agrees 
with Simarubee rather than with Zanthoxylee. 
* They consider Zanthoxylez as no more than a tribe of Rutacee. 
