880 THE AMERICAN NATURALIST. (VoL. XXXVI. 
PLATE III. 
(All natural size.) 
Viola tricolor L. 
Fic. 1. Stages in early spring growth from rootstock of preceding year. 
Fic. 2. Stages below flower. Numbered in reverse order of development for 
comparison with preceding. 
Spirea salicifolia L. 
FIG. 3. Growth from lateral bud on plant of previous year. Bract-like leaves 
at base not numbered 
Tanacetum vuigare L. 
Fic. 4. Seedling with cotyledons and typical pair of first a leaves. 
Fic. 5. Seedling with second pair of nepionic leaves als 
Fics. 6-10. Leaves found near the base of adult aa in spring growth 
Compare 6 and 7 with 1 and 2 of Figs. 4 5: 
Fic. 11. Simplest leaf to be found ier early spring growth has withered. 
6-9. 
Very e when compared with Figs. 

