3 
lateral veins follow the petiole, diverge at the base of the blade and 
ramify near the margins of the leaf. They and their branches reticu- 
late with the branches of the midvein. When the lateral veins are 
not present the branches of the midvein reticulate with each other. 
The hypocotyl is of considerable length, sometimes slightly flat- 
tened. The tap-root, at first well marked, is sometimes lost among 
its fibrous branches, sometimes maintaining supremacy throughout. 
In one species, at least, branches arise normally from the axils of 
the cotyledons (Coreopsis discoidea). In Anthemis arvensis branches 
arise, if not from the cotyledons, from the axils of the first leaves. 
In some species the leaves, like the cotyledons, are opposite dur- 
ing the whole life of the plant. The remainder are of the two- 
fifths arrangement. The first internodes may not elongate; thus is 
brought about the radical leaved forms. The Phyllotaxy of these, 
however, may be detected by the sequence of development. 
The leaves may immediately assume very nearly the form of 
the mature plant. This is the case in Anthemis arvensis. Usually, 
however, there is a gradual transition in the first leaves from the 
cotyledons to the leaves of the mature plant. In Chrysanthemum 
Leucanthemum the.first leaves are neither like the cotyledons nor 
the succeeding leaves. 
In general it may be said that the first leaves show a tendency 
to retain the form of the cotyledons, but have the texture of the 
later leaves. 
The germination of the seeds of annuals and biennials is much 
more prompt than is the germination of seeds of perennials. A 
much larger percentage of seeds of the former germinate also. 
Their seedlings are larger and more capable of withstanding 
hardships. 
Several of the perennial plants of the order flower the first year. 
Flelenium autumnale and Aster Nove-Anghe are among these, 
The biennials store up food in their tap-root (Arctium, et al.), or in 
the branches of it (Lactuca). Their leaves during the first ou 
are radical and are usually of large size. 
1 
Germination. 
The lines of inquiry undertaken in connection with 5 the ger- 
mination of seeds were sions Before planting, the percentage 
