C 53/ ) 
PLATE XXVII. LETTER XXVI. 
SYNGEN. POLYG. FRUSTRATE A 
and NECESSARIA. 
Fig. 1. Centaurea montana. Mountain Blue 
Bottle. 
a The compound flower, showing the neutral 
or barren florets on the outside, longer 
than the fertile ones in the middle, 
and the ciliated scales of the calyx. 
b A barren floret. 
c A fertile floret, with some of the bristles 
at the base. 
d The same, divested of the corolla. 
e The pistil. 
N. B. This serves to explain the order Poly- 
gamia Frustranea in the class Syn- 
genesia. 
Fig. 2. Calendula officinalis. Garden 
Marigold. 
The compound radiated flower. 
The calyx, wirh the seeds in the ray only, 
bending inwards after the florets are 
decayed. 
