CLASS ANGIOSPERM^ 



COVERED-SEEDED PLANTS 



||HE Angiospermae include all plants in which the ovule or ovules are 

 contained in a closed ovary, which is sunnounted by a stigma or 

 stigmas, either with or without the intervention of a style. The 

 pollen grains from the anthers fall upon the stigmatic surfaces, or are 

 brought to them in one way or another and send out deUcately filiform tubes of 

 microscopic thickness, which grow through the style or ovary until they reach the 

 ovules and fertilize them, enabling them to ripen into seeds. The ripened ovaiy, 

 containing the seed or seeds, forms the fruit, which is very various in form and 

 structure. By far the greater number of trees belong to this class. 



The class Angiospermae is formed of two sub-classes: (i) Monocotyledones, 

 in which the embryonic plant within the seed has but a single leaf; the foliage 

 leaves are mostly parallel-veined, and the parts of the flowers are mostly in 3's or 

 6's; (2) Dicotyledones, in which the embryo has two seed-leaves, the foliage-leaves 

 are mostly pinnately or pahnately veined, and the floral parts in 4's, 5's, or multi- 

 ples of these numbers. 



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