38 (Enothera triloba. 



ceolate, acuminate, deeply and regularly sinuate, or nearly runcinate, 

 with dentures on the cut portions. The sinuations are largest towards 

 the apex, and decrease gradually as they approximate the base, which 

 terminates in an attenuation scarcely broader than the mid-rib. Flowers 

 radical, straw -yellow, vespertine, in favourable situations about the 

 size of the largest one figured in the plate, though often smaller. 

 Petals ovate, of very thin and delicate texture, acute, somewhat threc- 

 lobed towards the apex, three-nerved, nerves white, one central and 

 the other two running from the base to the point of each lobe or tooth. 

 Stamens two, proceeding from the base of each petal. Filaments yel- 

 low, nearly half an inch long. Anthers oblong, orange-yellow. Tube 

 very long— from two to three and a half inches. Capsules radical, 

 large, somewhat tetragonous, with a wing proceeding from each angle, 

 forming a cruciform apex, of a dull-green colour, and collected to- 

 gether in dense clusters. 



Grows in the arid and partly denudated prairies of Red River, where 

 it was first discovered by Mr. Nuttall* in 1819. 



This is the second species of (Enothera iigured in the present work, 

 and possesses considerable interest in the estimation of botanists, on 

 account of its curious habit and structure. To those who take no in- 

 terest except in the mere beauty of plants, nothing can be said in its 



* Jour. Acad. Nat. Sc. Phil. 1821. 



