26 _. INTRODUCTION TO » ° 
it right. We then obsetve that the two Orders in this Clafs 
are characterised from the Seeds being naked, (GyMNOSPER- 
MIA ;) or covered, (ANGIOSPERMIA.), In our specimen we 
find 4 naked Seeds at the bottom of the cup: so that it belongs 
to the first Order. This Order admits of two subdivisions, 
founded upon the clefts of the cup: our plant arranging under’ 
cups with 5 clefts, we carefully compare it with each of the 
Generic characters ; and, after some difficulty, guided by the | 
bristle-shaped tooth on each side the mouth of the Blofsom, 
we suspect it may be a Lamium; though we are not certain 
but it may be a Galeopsis. We therefore compare our plant 
with the Generic descriptions ‘of both; and further aided by 
the Efsential Generic characters at the head of the Species, — 
we find that it isa Lamium. Upon reading the characters of 
the three British Species, we are soon determined by the taper 
pointed, heart-shaped Leaves, &c, to call it the Lamium album, 
or White Archangel, : 
tei EXAMPLE XIV. 
a CHEIRAN'THUS. -(Wall-flower.) 
This plant is very generally known. It grows wild upon old 
walls, and is frequently cultivated in gardens, “data 
Carefully remove the Calyx and the Petals, and you-will 
find 6 Stamens; two of which are shorter than the other 4. 
It belongs therefore to the Clafs Tetradynamia. The Orders 
of this Clafs depend upon the form of the Seed-velsel; and, — 
_ after examining the specimen, you necefsarily refer it to the — 
first subdivision of the second Order; for the Seed-vefsel is a 
long Pod, and the leaves of the cup stand upright and close to _ 
the Blofsom., It is possible you must difsect several Flowers 
before you can ascertain the Genus; for this Clafs, like the 
preceding, is composed of a natural afsemblage of plants, — 
whose flowers bear a strong resemblance to each other, and 
the differences, when this is the case, are not very obvious. At 
Tength, however, the small glandular substance on each side 
the base of the Germen, determines you to refer it to Cheiran- 
thus. Upon a comparison with the Generic description, you 
find it accurately described ; and the shape of the leaves, &¢. 
put it beyond a doubt that it is the Cheiranthus Cheiri, of 
Wall July-flower, : Con fe 
