* 
_ _ cannot, however, follow him here into these details, which resul 
212 THE VEGETABLE WORLD. 
vary in general in their mode of insertion, being hypogynous in! 
the Graminaceew and Cruciferse, upon the corolla in the Labiata! 
and Compositz, and upon an epigynous disk in the Umbellifere. | 
He obtained thus the true value of certain characters which ought” 
neyer to yary in the same family; but along with these he found” 
Ss e 
Fig. 292,—Laurent de Jussieu. 
others more variable, which he sought to appreciate also, either si ? 
, assist him in the study of other families analogous to them, or 1” 
ee) 
Bi 
explaining those which he had formed, by applying his first 
rules along with many others founded on observation. 
