GERMINATION OF WOODY PLANTS 
281 
Fig. 46. Hard maple. Samara, parts separated. Photo by E. H. Richardson. 
is a slight enlargetiient at the point where they are attached. 
The plumule is feathery in appearance. The first pair of leaves 
is coarsely dentate and has the characteristic outline of the maple 
leaf. The stem between the cotyledons and the first pair of 
leaves is smooth. There are some hairs on the petioles, the leaf 
margins, arid upon the veins on the lower side of the leaf. The 
lower side is lighter in color than the upper side. 
Eleagnaceae 
Bleagnus angustifolia L. Russian Olive. See figure 47. 
April 5, 1921, young seedlings appeared freely under olive trees 
on the campus. The germinating seed lies in the soil close to the 
surface. The seedling cotyledon pushes off the hull and the 
white radicle descends, arching the hypocotyl. 
The seedling develops very slowly. The two cotyledons, at 
first closely appressed, are about 1/3 of an inch in length, nearly 
oval, smooth, greenish, fleshy, distinctly auricled at the base. The 
Fig. 47. Bleagnus angustifolia. Emerging cotyledons leaving seed coat. Young 
seedling cotyledons shown separated. Stellate trichome hair. Drawn by C. M. King. 
