of unequal length, slightly pubescent, erect, straight. Calyx 

 white, glabrous, triphyllous, leaflets unequal, the upper one 

 the smallest and most acute, the two lower rounded, and co- 

 hering towards their base. Corolla a beautiful, rather pale 

 blue, of three unequal petals, each concave, rounded, 

 slightly and unequally crenate, (the largest three-fourths of 

 an inch long, and nearly as much broad,) the two upper ones 

 particularly unguiculate. Stamens (five ?) inserted within 

 the base of the corolla, and sometimes attached to it at 

 their origin; filaments glabrous, pale blue, less than half 

 the length of the petals. Anthers, two abortive, yellow, 

 lobed, three fertile, white, linear, sagittate at their base ; 

 pollen white. Germen superior, ovato-acuminate, white. 

 Style deflected upon the lower petal, otherwise like the 

 filaments, and similar to them in length. Stigma small, 

 three-lobed. Unripe capsule three-sided, three-celled. 



The seeds of this very pretty species of Commelina were 

 gathered by Mr. Cruckshanks in the valley of Lima, and 

 communicated to me last spring. The plants flowered 

 freely in the greenhouse in July. Graham. 



It appears, from a comparison of this plant with the figure 

 and inscription of C. gracilis in Ruiz and Pavon, that it is 

 the same ; an opinion in which Dr. Graham concurs. 



Fig. 1. Fertile Stamen. 2. Sterile Stamen, or Nectary. 3. Calyx and 

 Pistil. — Magnified. 



