“in 4. calendulacea the corollas are yellow or orange, turning to 
flame-colour,” in 4. occidentalis they are white, streaked with 
red on the tube and outer tips of segments, and have the upper 
lobe of the limb of the corolla within, yellow on the disc. In- 
deed the definitions of 4. viscosa, nudiflora, and calendulacea ot 
_ Eastern America, seem to me by no means satisfactory: few of 
the characters laid down are permanent, and the difficulty of 
giving faithful characters is increased by numerous varieties and 
hybrids that are studied in our gardens. The present is the 
only Azalea of North America found to the west of the Rocky 
Mountains. 
Fig. 1. Calyx and pistil. 2. Stamen :—magnified. 
