54 



EXPLANATION OF PLATE IIL 



1. The Evening Primrose Tribe. — 1. A ^ovfer of the Shrubby 

 Evening Primrose half unfolded ; a the tube of the calyx ; b the divi- 

 sions of the calyx ; c the ovary. — 2. The same flower deprived of its 

 petals, andwith its sepals divided from each other, shewing the stamens 

 and stigma. — 3. The tube of the calyx cut open ; at the top are seen 

 the bases of the eight stamens that spring out of it. — 4. A stamen. — 



5. A cluster of pollen grains, with the threads by which they are held 

 together ; represented as they are seen when immersed in water. — 



6. A ripe fruit, with the four openings at the top, through which the 

 seeds escape. — 7. The ovary cut through, before it is ripe ; it exhibits 

 the four cells, and the numerous seeds in them. — 8. One of the valves 

 of the fruit separated from the others, with the seeds sticking to it. 

 — 9. A seed. — 10. An embryo, from which the seed-coat has been 

 stripped ; it is not surrounded by albumen, but is protected only by 

 the skin of the seed. 



IL The Myrtle Tribe. — 1. A flower of the Common Myrtle, 

 much magnified. — 2. The same cut perpendicularly, shewing two of 

 the cells of the ovary, and the origin of the style and stamens. — 2*. 

 A cross section of the same.- — 3. Another with part of a filament. 

 — 4. The tip of the style and stigma. — 5. A ripe fruit. — 6. The 

 same cut across, with the curved embryo seen lying within it, with- 

 out any albumen. — 9. A leaf. — 10. A portion of a leaf magnified, 

 shewing the transparent dots in it. 



