Cyamiis luteus. 83 



failures have in all probability been owing to a want of that peculiar 

 kind of indigo-coloured, tenacious, clayey mud, which fills the bottoms 

 of the pools in which it so luxuriantly thrives, and in which its roots 

 are buried to the depth of several feet. 



Fig. 1. Represents a flower-bud, culled about a week before maturity. 



2. The expanded flower, one day old, one or two of the front 



petals turned aside to give a full view of the stamens and 

 germ. 



3. An outline leaf, nearly of its smallest size. They are generally 



twice as large as this, and often two feet in diameter. 



4. A pericarp, the commonest size, they are often twice as large. 



5. A seed or root. 



6. A stamen, taken from the flower after it has continued a day 



or two expanded. 



