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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



petiole (figs. 88, 89, 90). This is usually also the case with sepals, but not 

 always ; so, too, is it the same with petals, but as a rule a definite 

 number (five in Dicotyledons, and six in Monocotyledons) only enter the 

 floral receptacle. Then, to supply all the parts, this is done by repeated 

 branching. Thus, in an extreme case, at the base of the ovary in the 



Fig. 1)7. - Transverse section of swollen Fig. 98.— Branching cords within same, 



floral receptacle of same. for supplying numerous sepals and 



petals. 



Garden Marigold there are only two cords in the stem wherewith to 

 supply the whole flower. One supplies two stamens and a carpel, the 

 other, three stamens and a carpel. The petals have none in this flower. 



Fig. 99 illustrates the distribution of the cords in a flower of Jasionc, 

 of Campanula cece. Five cords come up from below ; when they reach 

 the top of the ovary — which is inferior in this flower, as it is in the 

 Canterbury Bell — they branch horizontally, making a complete girdle at 

 the base of the floral whorls. The reader will understand how their 

 parts are supplied by the accompanying letters, as follows : — Sepals (S), 

 petals (P), stamens (St), style of the carpels (C). 



In some flowers chorisis is repeatedly applied to a cord, and the result 



St 



Fig. 99. — Isolated cords of the flower Fig. 100. — Transverse section of pedicel 



of Jasionc, showing how members of Mallow, 



are supplied. 



is a multifold organ. This occurs, e.g., in Malvacece. Thus, in Mallows 

 five cords only enter the floral receptacle (fig. 100). Each divides tan- 

 geiitially into five, in two pairs, and one (outermost) being single. This 

 last is for the petals (fig. 101, chorisis of tico original cords only). The 

 adjoining pair are for ten stamens ; the innermost pair are for ten carpels. 



