( 3° ) 
of, flowers arc thofe which ftiould he made 
choice of by the young ftudent for dhTection, 
as their parts are more diftincTiy vifible ; the 
crown- imperial (fritillaria imperialis), the~ 
poppy (papaver), and the tulip (tulipa), are 
well fuited to this purpofe, although there 
are circumftances in each which may perplex 
a novice in the fcience. The calyx of the 
poppy falls off immediately when the flower 
expands; the crown-imperial and the tulip 
have not any. Linneus efteems only two 
parts of fructification neceflary to conftitute a 
flower, in the language of botany, though, 
perhaps, there might properly be added a 
third, the Neffary : the calyx is the part 
wanting in the tulip and crown-imperial ; 
but when only one of thefe covers is found, 
it muft not be inferred to be the corol becaufe 
it is not green. Although in mod cafes the 
Corol may be known by the gaynefs of it's co- 
lour, or by it's not encloling the feeds, there 
are too many exceptions to thefe rules to al- 
low them to be wholly relied on. The petals 
in paffion-flowei (paffiflora) are green, like the 
leaves; the corol in Selago enclofes the feeds. 
The calyx and corol may, however, be diftin- 
guifhed by the following rule : the flamens 
and 
