144 CYNTHIA DANDELION.—THE DANDELION CYNTHIA. 
the decrease in growth force. When this great rhythmic wave 
is nearly exhausted, a new current starts again to form the parts 
of the flower, and we may reasonably look for the same form of 
modified leaves (petals) in the first start of this new wave growth, 
as we found in the first start in growth of the wave which formed 
the flower-stalk. 
EXPLANATIONS OF THE PLATE.—1. Branching stem. 2. Flower stem with head showing the 
expanding involucre in fruit. 3. Achene with double pappus, the outer short and scale-like 
at the base of the long hair. 4. Root (slightly tuberous) with root leaves. 5. Flower, with 
all the florets strap-shaped, the interior not yet expanded. 6. Faded flower showing the 
conical involucre. 7. Enlarged somewhat amplexicaul base of the stem-leaf. 
