
NATURAL ORDERS 
ALY 
flower is inconspicuous ; on the other hand, self-pollination 
takes place regularly, the pollen grains of the anther-tube 
adhering to the edge of the stigmas as 
they separate when emerging from the 
anther - cylinder. That  self- pollination 
takes place is clear, for Groundsel is pro- 
ductive, even in bad weather, when insect- 
visits are scarce. 
_ This genus is one of the largest of the 
Composite, and very widely distributed. 
Cornflower. 
all tubular; those forming the 
margin are large, blue, and very conspicuous. 
They consist only of a corolla, and attract 
insects. The disc florets are very similar to 
those of the Sunflower. 
In Cornflower the florets are 

Fig. 99.-—FLORET 
OF GROUNDSEL. 
6; corolla +a, 
anther - tube; 09, 
ovary; sg, stig- 
mas, 
Ecology of | About one-tenth of all the Flowering Plants 
the Order. helong to this Order, which is distributed over 
the whole globe, more particularly in temperate climates ; the 
100 101 

Fics. 100 And 101.—Ray AND Disc FLoRET oF CORNFLOWER. 
c, corolla ; a, anther-tube ; 0, ovary ; sg, stigmas. 
majority preter open spaces, and are abundant in meadows. 
The vegetative organs of the Composite vary very much, and 
this partly accounts for their extensive distribution, as it is 

9—2 
