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IOWA ACADEMY OF SCIENCE Vol. XXVIII, 1921 
Fig. 44. Hard maple. Germinating seeds. Drawn by C. M. King. 
Germination is epigaeous. The white radicle first pushes out of 
the seed coat at the basal end between the two samaras. The 
radicle is smooth, at first straight ; the slightly curved caulicle is 
smooth, whitish, slender, slightly narrowed at the base ; apex 
rounded. The first appearance above ground is the arch of the 
caulicle. The two strap shaped cotyledons are 3~veined. There 
Fig. 45. Hard Maple. Seedling, showing cotyledons and plumule. Photo by Mr. 
Richardson. 
