ORGANOGRAPHY. 
BOOK I. 
116 117 
119 120 
into the mouth of the corolla, it is meant that they cohere 
with the corolla as far as the mouth, where they first separate 
from it ; when in the Rose they are said to be inserted into 
the calyx, it is meant that they cohere with the calyx up to a 
certain point, where they separate from it ; when in Arabis 
they are said to be inserted under the pistil, it is meant that 
they cohere with neither calyx nor corolla, but stand erect 
from the point which immediately produces them ; and finally, 
when in Orchis or Heracleum they are said to be inserted into 
the pistil, such an expression is to be taken as meaning that they 
cohere with the pistil more or less perfectly. For excellent argu- 
ments in support of this hypothesis, see Dunal's Considerations 
sur la Nature et les Rapports de quelques uns des Organes de la 
Fleur. I do not use them, or any such, here, because it seems 
to be so self-evident a fact, when once pointed out, as to re- 
quire no demonstration. 
When the filaments are combined into a single mass, the 
mass is said to be a brotherhood or an adelphia : if there is 
one combination, as in Malva, they are monadelphous (Jig, 114.); 
if two, as in Fumaria or Pisum, diadelphous ; if three, as in 
some Hypericums, triadelphous ; if several, as in Melaleuca, 
polyadelphous {Jig. 112.). The tube formed by the union of 
the filaments in a monadelphous combination is called, by 
Mirbel, androphorum. 
If the stamens are longer than the corolla they are exserted ; 
if shorter, they are called included : when they all bend to one 
side, as in Amaryllis, they are declinate ; if two out of four are 
