BOTANICAL LABELS. 
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their station in the system, and the orders, in like manner, on 
the lower part. 
The twelfth and thirteenth classes differing only as regards 
the situation of the stamens, and not in their number, so here 
they differ only as to disposition; the twelfth, Icosandria , being 
shown by a number of small dots on the exterior and lower 
corner of each upper wing, and the thirteenth, Polyandria , by 
similar dots on the interior and lower corners of the same. 
The following five classes are distinguished by bars or bands 
of black running on the margins of the upper wings. Class 14. 
JDidynamia has one band on the exterior margin of each upper 
wing: it has two orders, the first, Gymnospermia, is easily known 
by the absence of any marks on the lower wings; the second, 
Angiospermia , has a continuation of the band which denotes the 
class round the lower wings also. Class 15. has two bands on 
the margin of each upper wing, and its orders are marked by 
the same absence or presence of bands on the lower ones. 
Class 16. Monadelphia is known by a single band, and one spot 
on the upper portion of the body. Its orders, seven in number, 
are distinguished by the number of spots on the lower wings, in 
the same manner as for the first eleven classes. Class 17. Di- 
adelphia is represented by a band and one spot on each upper 
wing, and its orders in the manner of Monadelphia. Class 18. 
Polyadelphia > in addition to the band on the exterior of the 
upper wings, has a number of small dots disposed as explained 
for the twelfth and thirteenth classes: its orders are marked in 
the same manner as the last. 
Class 19. Syngenesia is known by a small ring on each upper 
wing. It has five orders: — 1st, ttqualis , has no marks; 2d, 
Superflua , known by a ring on each lower wing; 3d, Frustranea , 
by two rings, with a central spot in each ; 4th, Necessaria, has 
two double rings with central spots ; 5th, Segregata, has also 
double rings, and a spot on the middle of the lower part of the 
body. 
Class 20. Gynandria is known by a ring with a central spot 
on each upper wing; it has three orders, known as in Tri- 
andria. 
Class 21. Moncecia is distinguished by a double ring on each 
upper wing, and its orders, eight in number, the same as the 
last. 
Class 22. Dicecia , represented by a double ring and central 
