THE AMERICAN BOTANIST 169 



Tint trees, wliicli latter, Lliough not entirely immune U> the 

 disease, are rarely killed by it. 



Coxsi'ici'ous Ki/n\ Kk Cot.or. — Durini,^ the blooming 

 season any locality has numerous (lowers in l)loom but it 

 nearly always happens that one or more are so bri,i(ht, or so 

 abundant, or so inclined to grow in dense colonies that they 

 give the color-tone to the locality. Flowers of this nature 

 are the mountain laurel, the azalea, the rhododendron, the 

 ox-eye daisy, and the buttercup. As the sea.son advances 

 and flowers multiply, it recpiires special abilities for a single 

 species to take the landscape in this way. The flowers usual- 

 ly manage it by growing in immense numbers in a favorable 

 area. In July, an unidentified vetch with close clusters of 

 tleep lavender-blue flowers was the most conspicuous species 

 in Quebec and northern New ^'()rk. In the Hudson valley the 

 I line devil (BcJiium) and the orange hawkweed or devil's 

 paintbrush {Hieraciiim) by turns lit up the countryside, but 

 across southern New York the Canada tiiistle api)eared as a 

 most decorative plant. The rains and cold weather had 

 deepened the color of its blossoms to a clear lavender and the 

 thick-set colonies in the meadows and along fence-rows made 

 pleasant spots of color. On stony hillsides and "hog-backs" 

 as the sharp ridges of glacial drift are called, the blue of the 

 creeping bell-flower, {Campanula rapuncnloidcs) was con- 

 spicuous and in an occasional swam]) the deep magenta blos- 

 soms oi Lythruin salicaria made a new note of color. 

 Across the sand hills of northern Indiana the butterfly 

 weed was the dominant plant and as the rich i)lack soil of 

 the Illinois prairies was reached the button snakeroot {Lia- 

 tris) made many acres ro.sy with its myriad spikes. 



Pri'xKLL.\ vulgaris nana. — More than twentv years 

 ago. the writer gave the name of PruucUa iitlyaris nana to 

 a form of the common blue curls which instead of growing 



