the testa of Coll. linearis. Its testa is in like manner muci- 

 laginous, and, if examined with a high magnifier, is seen 

 to be covered with an entangled mass of hairs, held together 

 by the mucilage, and evidently analogous to the coma of 

 some plants, but most particularly to those hairs that cover 

 the surface of certain of the Convolvulus tribe, to which 

 Polemoniaceae have a strong affinity. 



Dr. Hooker is undoubtedly right in referring this to 

 Collomia, rather than to Gilia, where Douglas wished to 

 place it. 



J. L. 



