AND WHAT THEIR TARTS ARE. 



19. Notice, also, tliat the calyx and the corolla, one or both, often consist of 

 separate leaves ; as they do in the true Lilies. Each separate piece or leaf of a 

 corolla is called a Petal: and each leaf or piece of a calyx is called a Sepal. 



20. The corolla, the stamens, and generally the calyx, fall off or wither away 

 after blossoming ; while the ovary of the pistil remains, grows larger, and becomes 



21. The Fruit. So that the fruit is the ripened ovary. It may be a berry, a 

 stone-fruit, a nut, a grain, or a pod. The fruit of the Lily and also of the Morning- 

 Glory is a pod. Here is the pod or fruit of the 

 Morning- Glory (Fig. 4, fr. and Fig. 13), with 

 tiie calyx remaining beneath, and the remains 

 of the bottom of the style resting on its summit. 

 And Fig. 14 shows the same pod, fully ripe and 

 dry, and splitting into three pieces that the 

 seeds may fall out. This pod has three cavities 

 (called Cells) in it; and in each cell two pretty large seeds. Lily-pods have three 

 cells, as we may see in the ovary in the flower (Fig. 12), and many seeds in each. 



22. Seeds. These are the bodies produced by the ripened pistil, from which new 

 plants may spring. Here (Fig. 15) is a seed of 

 Mornin^- Glory, a little enlarged. Also two seeds 

 cut throuiih lengthwise in two different directions, 

 and viewed with a magnifying-glass, to show what 

 is inside (Fig IG^ 17). The part of the seed that 

 grows is 



23. The Embryo, or Germ. This is a little plantlet 

 ready formed in the seed. In the Morning-Glory it 

 is pretty large, and may readily be got out wdiole 

 from a fresh seed, or from a dried one after soaking 

 it well in hot water. In Fig. 16 it is shown whole 

 and flatwise in the seed, where it is a good deal 

 crumpled up to save room. In Fig. 17, merely the thickness of the embryo is 

 seen, edgewise, in the seed, surrounded by the pulpy matter, which is intended to 

 nourish it when it begins to grow. In Fig. 18, the embryo is shown taken out 

 whole, and spread out flat. In Fig. 19, its two little leaves are separated, and we 

 plainly see what it consists of. It is a pair of tiny leaves on the summit of a little 

 stem. The leaves (Fig. 19, r, c) are named Seed-leaves or Cotyledons ; the little 

 stem or stemlet is named the Radicle, r. 



15 



