EXPLANATION OF TERMS. 



XXV n 



Neutral Flowers have neither stamens nor pistils. 



A Complete Flower is one which has both of the organs of reproduction, 

 and also those of protection, the calyx and corolla. 



Incomplete Flowers are lacking in one or more of these parts. 



Regular Flowers are symmetrical, the parts of each set of their organs 

 being alike in size and form, while Irregular Flowers show often great 

 variations in their respective parts. 



The Calyx (FiG, 37) of a flower is the outermost set of leaves at its 

 base which rests on the receptacle or end of the flower-stalk and usually 

 encloses the corolla and organs of reproduction. When divided to the base 

 the leaves of the calyx are called Sepals. It then may further be de- 

 scribed as being Polysepalous. 



WA eel-sh aped. 

 FIG. 39. 



Tubular. 

 FIG. 42. 



Strap or Ray Flo%ver. 

 FIG. 43. 



Should, however, the sepals be wholly or partly grown together, the calyx 

 would be called Gamosepalous. 



The Corolla is the usually showy and inner set of leaves of a flower. Its 

 separate leaves— that is, when they are divided to the base — are called Petals, 

 and the corolla would then be termed Polypetalous. 



When it is wholly or partly grown together it is known as being 

 Gamopetalous. 



Both the calyx and corolla are described as Parted when their parts are 

 divided to nearly the base ; Cleft, or Lobed, when divided to about the 

 middle ; and Toothed when the lobes are very small. 



Under Gamopetalous Corollas some of the different forms are best 

 described as being : 



Salver-Shaped : when the border spreads out flatly and at right angles to 

 the summit of the tube. (FiG. 38.) 



