Oenothera triloba. 39 



praise. It is not only vespertine in its inflorescence, but has an herbage 

 destitute of any attractive appearance. Its flowers are in themselves 

 sufficiently handsome, and of a very delicate hue; but as they bloom 

 after the sun leaves the horizon and wither before the morn, it is neces- 

 sary to examine the plant by a light, in order to see its florescence. It 

 appears to be hardy, enduring our winters extremely well, and in this 

 case becomes a biennial ? flowering in the second vernal month. It 

 occasionally is only annual, a circumstance for which Mr. NuttaU ac- 

 counts by supposing the disproportionate magnitude of the radical cap- 

 sules stifle the growing vigour of the plant. 



Fig. 1. Represents the plant, in fruit. 



2. A flower, culled an hour before sunset. 



3. The same, in bloom. 



4. The rotate corolla, separated. 



5. A stamen. 



6. A petal, with the two stamens attached. 



7. Pistil and tube. 



(All the size of nature.) 



