169 



terms are frequently coupled in speaking of the 

 corolla : of which the Olive and Jasmine tribes afford 

 a striking example. The former is said to have a 

 valvate cBstivation, the latter an imbricated cestivation. 



EXPLANATION OF PLATE XIIL 



1. The Gentian Tribe. — A plant of Gentianella (Gentiana 

 acaulis). — 1. The lower part of a corolla, with the five stamens at- 

 tached to it. — 2. A pistU. — 3. An anther. — 4. A ripe fruit dividing 

 into two valves a, and invested with the withered remains of the 

 calyx and corolla. 



n. The Olive Tribe. — 1. A flower of the Privet (Ligustrum 

 vulgare). — 2. The face of an anther. — 3. The back of one. — 4. A 

 calyx with its pistil. — 5. The same cut through perpendicularly, 

 shewing the ovules hanging in the cells of the ovary. — 6. A horizon- 

 tal section of the same. — 7. A cluster of ripe berries. — 8. A fruit cut 

 through, with a view of the single seed and the embryo within it; 

 a the second cell, which is nearly obhterated by the pressure of the 

 seed upon it. — 9. A seed extracted from the pulp. — 10. The same 

 cut across. — 11. The embryo taken out. 



