80 MODERN TREATMENT OF ASTER 
deeply violet 4. Herveyz. A series of such specimens from the 
Adirondack region was actually separated and published as a va- 
riety zztermedia under A, Herveyi by Professor Peck in 1893, but 
was soon remanded by him to 4. macrophyllus, where I think they 
belong. 
At last, after multitudinous comparisons, I established the gen- 
eral law for Biotian Asters, that when a blue element (producing 
violet, which often speedily changes to white) is present in the 
rays, it is accompanied by glandular surfaces. It was only on 
full recognition of this law that separation and classification of the 
tangle of macrophyllus forms became possible. Glands had been 
observed in certain of the species in German gardens by Nees 
before 1832, and perhaps earlier by Bernhardi in his A. glutinosus ; 
but without reaching the perception of their absence from the 
whole white-flowered complex of species formerly assigned to 4. 
macrophyllus. 
