878 THE AMERICAN NATURALIST. 
[VoL. XXXVI 
PLATE II. 
(All natural size.) 
Chelidonium majus L 
FIG. 1 Seedling showing cotyledons and first and second nepionic leaves. 
Fic. 2. Seedling as preceding, but showing also third nepionic 
Mass. 
preceding. 
leaf. 
Fic. 3. Leaves of early spring growth. In sandy soil at Arlington Heights, 
4th, 6th, and 8th leaves not shown—each like the one immediately 
Ranunculus acris L. 
FIG. 4. Seedlingshowing cotyledons and Ist, 2d, and 3d nepionic leaves. 
IG. 5. Simplest leaf found i 
weak plant. 
in an 
ult plant; first leaf of spring growth of 
wo halves of leaf show difference in acceleration of development. 
Compare right half with r of Fig. 4; left half with 2 of same figure. 
veins 
Compare with 2, Fig. 4. 
Compare with 2, 3, Fi 
Fics. 8,9. Later stages in adult plant and complication of the network of 
Fic. 10, Typical adult leaf. 


