20 



THE VEGETATIVE ORGANS 



us with excellent material, and we will begin with the Bean- 

 pod (Fig. 6, i). This is a fruit derived from the pistil of the 

 Bean flower, but, unlike the Stock fruit, it consists of only 

 one carpel. The parts of the pistil and some remnants of 

 the flower may be found. At the base is the calyx (k), and 

 often parts of the stamens are to be seen. The ovary has 



Fig. 7. Dissection of the Bean Seed. 1, seed with funicle 

 attached ; 2, end view of seed ; 3, dry seed ; 4, partly soaked 

 seed ; 5, concave edge of seed ; 6, testa showing entrance to radicle 

 pocket ; 7, radicle pocket in side view ; 8 and 9, cotyledons separated ; 

 c, cotyledon ; fu, funicle ; h, hilum ; m, micropyle ; pi, plumule ; 

 ra, radicle ; r.p, radicle pocket ; t, testa. 



enlarged greatly, and now contains the seeds, or beans as we 

 call them, while at the tip are the remains of the style and 

 stigma (st). If we cut the pod along its upper edge and 

 open it (2), we find it is to this edge that the seeds are 

 attached. The seed-stalk or funicle (fu) is curious; 

 it grows from the edge or placenta (p) of the carpel, and 

 it enlarges into a much-thickened body clasping the seed. 



