Seedling Anatomy of Certain Sympetalae. II. 315 
four phloem groups fuse in pairs, and near the root-tip there is a typical 
diarch stele (Diagram 8, iv). 
In one seedling in which the cotyledons were comparatively thick, the 
bundles in them showed less division and re-fusion. A further point of 
difference concerns the intercotyledonary bundles ; these moved to the same 
side in the hypocotyl, instead of assuming the diagonal position. 
Galinsoga parvijlora , Cav. Seedling about 2-5 cm. long, with a very 
slender hypocotyl. The transition region is elongated, and the rearrange- 
ments are like those in Heliopsis laevis i Seedling B. 
Madia saliva , Molina. Seedlings slender, over 12 cm. long, and 
possessing comparatively large, foliaceous cotyledons. 
The details of transition are exactly like those in Heliopsis laevis, 
Seedling B , and it is worth noting that though these seedlings were twice 
the size of Seedling A in the species just referred to, there was only the 
slightest trace of a tetrarch structure. 
Tribe VI. Helenieae. 
Baeria coronaria , A. Gray. Seedlings about 3 cm. long and extremely 
slender. 
Little vascular tissue is present. The two laterals in each seed-leaf fuse 
with the midrib before they reach the short cotyledonary tube, and the 
details of transition conform to Van Tieghem’s Type 3. 
