172 TYPES OF BRITISH PLANTS 
sepalled calyx, a white, many-petalled corolla, and a 
yellow centre in which one presumes stamens and petals 
to lie. But all this is deceptive. That so-called calyx is 
really a row of bracts overlapping one 
another, and acting as a calyx for the 
entire group of flowers, in the same way 
as did the big single bract that enclosed 
the arum flower. Look also at our “corolla” 
under the glass, and you will see that each 
ray is itself a minute flower, with a tubular 
corolla, one lip of which has developed 
enormously into this strap-shaped ray. The 
effort of producing all this tissue in the 
corolla appears to exhaust the flower to a 
certain extent, for very few of these showy 
flowerets of the outer ring ever produce 
stamens or pollen, and some devote their whole energies 
to the corolla, and have not even a pistil. There is an 
exceptional group, which we shall meet later, in which all 
the flowerets are rayed, and all have both stamens and 
pistils. The Ox-eye is content with pistils in the white 
rays. 
Now look at that yellow centre with the glass, and you 
will see that it consists of hundreds of little five-toothed 
tubes, each fully equipped with a ring of anthers at the 
top, and, if mature, there will also be in view a two- 
armed pistil spreading over each. This two-armed pistil 
does not force its way up until the anthers have shed 
their pollen, which covers the tube, like soot im a 
chimney; then the pistil forces its way up and sweeps 
all the pollen well out into the upper part of the flower. 
After that, it opens its two curling arms, and is at home 
to visitors. 
OX-EYE DAISY. 
