HOW TO FACILITATE THE STUDY OF BOTANY. 



2J7 



The Natural orders consist of genera, for which word I should 

 substitute " forms," and these again of species or " kinds." 



Regarding the details of the plants, the following short sketch 

 may serve as an illustration of a revised terminology. 



The complete flower consists of four different kinds of transformed 

 leaves. The outer series or " ring " is the calyx, " the cup," formed 

 of free or united sepals, iC cup-leaves'' ; next comes the corolla, 

 "crown," formed of free or united petals, "crown leaves"; the 

 "cup" and "crown" together are called perianth, "floral cover/' 

 which is termed double when both cup and crown are present, single 

 when one of either is absent, in which case it is either calycine "cup- 

 like" or corolline, " crown-like." When the floral cover is entire, 

 the lower part is called the tube, the upper part the limb, collar, 

 which may be campanulate, "bell-shaped"'; rotate, " wheel-shaped" ; 

 hypocrateriform, f< saucer-shaped," &c, &c. Next comes the 

 andrascium, the male organs, consisting of stamens, "dust bearers " 



