CALYX. 45 



laarel (Kalmia), the anthers are confined in ten cavities in the corolla; at the 

 proper season they are disengaged, and throwTi forcibly against the stigma, by the 

 elasticity of the filaments. In Monoscious and Dioecious plants, where the sta- 

 mens are placed apart from the pistils in different flowers, the pollen is often con- 

 veyed to the pistil by insects in going from flower to flower in search of honey. 



93. Soon after the pollen falls j^aa the stigma, the outer coat 

 of each granule bursts (69, a) at one or more points, allowing 

 the inner coat to pass through it in the form of a tube. This 

 tube insinuates itself between the cells of the stigma, and 

 passes down between the loose cells of the style, extending 

 itself until it reaches the ovary, even when the style is of con- 

 siderable length. When these tubes reach the ovary, they 

 direct themselves towards the ovules in different parts, and 

 enter the foramen, which at tliis time is turned towards the 

 base of the style, and brought in contact with its conducting 

 tissue (83). 



94. The molecules which the pollen grains contained (69, a) 

 are seen to pass down the tubes, and some of them are con- 

 veyed into each ovule. Wliilst yet within the tube, they are 

 seen to develop themselves into new cells, and these becoming 

 fixed in their places constitute the embryo, or the rudiment of 

 the future plant. 



CHAPTER VII. 



THE FLOWER. 



f5. OF THE CALYX. 



95. The term calyx comes from the Greek, and signifies a 

 cup. It is applied to the outer whorl of the floral envelopes, in 

 reference to its common fonn and position. It is generally 

 green, but is sometimes colored, that is, it is of some other coloi 

 than green. It seems designed for the protection of the more 

 deUcate organs of the flower in aestivation (in the bud). 



96. The di\dsions of the calyx are called sepals, which are 



