322 
Lee.- — Observations on the 
Picris echioides , Linn. Seedlings 5-6 cm. long, with slender hypocotyl 
and large foliaceous cotyledons. Transition as in Charieis heterophylla , , 
with only slight variations on the latter. 
Tragopogon duhius , Scop. Seedlings 10-12 cm. in length, with short 
hypocotyl and long, linear cotyledons. 
Though the seedlings differ so much externally from those of Centaurea 
macrocephala , the transition is almost exactly similar. In the upper part of 
each cotyledon, there are three main vascular bundles with numerous smaller 
ones. At the base these give place to five strands which in most seedlings 
follow the course described for Centaurea macrocephala. An almost perfect 
tetrarch root is formed, which becomes diarch at a lower level. 
Diagram ii. Hieracium alpinum. 
In one seedling the outermost bundles in the cotyledons disappeared 
soon after fusion. In the same specimen there were two extra small bundles, 
one on either side of the midrib, which persisted for some distance in the 
hypocotyl. It was not clear whether these small strands finally died out or 
fused with some of the other bundles. 
Lactuca sagittata , Waldst. Seedlings small (less than 5 cm. long) ; 
cotyledons equal in size and rather fleshy. Transition almost exactly as in 
Charieis heterophylla . 
Crepis rubra , Linn. Seedlings about 4 cm. long, each with a distinct 
cotyledonary tube. Transition as in Charieis heterophylla , with the 
exception that the intercotyledonary strands, instead of passing directly 
