222 
Hill. — Studies in Seed Germination. 
Fig. 8. Jlf. macrocarpus , Dunn. A seedling in which the plumule ( s .) has burst through the 
elongated petiole tube and is pushing up to the surface of the soil with tip bent over. The com- 
mencement of the hypocotyledonary tuber (b.) is noticeable. The petiole tube is covered by fine 
hairs. The testa has been removed to show the two partially fused cotyledons (c ). (Nat. size.) 
Fig. 9. M. korrtdus. An old seedling with well-developed plumular shoot (s.) and hypocoty- 
ledonary tuber which is still in connexion with the seed by means of the petiole tube. The tube 
has split first into its two component halves, and each petiole has then split into three strands. The 
tuber is deeply lobed below and on the upper surface bears adventitious buds. (Nat. size.) 
