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ORDER SEGREGATA. 
the same opportunity of strengthening your mental faculties by 
overcoming difficulties ; for its numerous species are in most 
cases so faintly distinguished, as to require some patience and 
application to trace out the specific differences. 
The genus Chrysanthemum contains the common daisy, 
sometimes called ox-eye ; it also includes many splendid for- 
eign plants, mostly of Chinese origin. The mountain daisy, 
(Beilis,) is the flower which you were taught to analyze under 
the head of compound flowers. 
FRUSTRANEA. 
The Third Order has the disk florets perfect ; those of the 
ray are neutral, having neither stamens nor styles, though an 
imperfect seed is sometimes seen at the base of the florets ; the 
name Frustranea alludes to this imperfect seed. We find here 
the Sunflower, (IIelianthus;) this is a very good plant to ex- 
amine, as the organs are large, and develope very clearly the 
peculiar character of the class Syngenesia. 
In this order is the Centaurea benedicta, or blessed thistle, 
a native of Spain, which received its name on account of some 
extraordinary virtues which it was thought to possess, such as 
being a remedy' for the plague with which warm countries are 
often afflicted ; at present this plant is not much valued. 
NECESSARIA. 
The Fourth Order includes plants in which the rays only are 
fertile or pistillate, and the disk florets are barren or staminate. 
We find here the marygold, (Calendula.) 
SEGREGATA. 
The Fifth Order contains a few genera, with each floret 
having a calyx proper to itself, besides a common calyx includ- 
ing the whole of the florets which make up the flower ; this 
may be called a doubly compound flower. The only plant of 
this order yet discovered in the United States is the elephant's- 
foot, (Elephantopus,) a low, hairy leaved plant; with purple, 
ligulate florets. 
We have now completed a survey of the orders of the class 
Syngenesia; the plants which it contains are almost wholly 
referred to the natural order Composite or compound flowers ; 
by Jussieu, they are subdivided into three orders. 
Chrysanthemum — Order Frustranea-Sun-flower-Blessed thistle — Order 
Necessaria — Marygold -Order Segregata, Elephant’s-foot — Plants of this 
class referred to the natural order Composite. 
