304 TREES OF MINNESOTA. 
Plate 39. Ulmus pubescens. Slippery Ilm. 
1. Flowering branch, one-half natural size. 2. Fruiting branch, one-halt 
natural size. 3. A young winter branch with buds, one-half natural size. 
4. Winter branch, showing flower buds beginning to enlarge, one-half 
natural size. 5. Summer branch, one-half natural size. 6. lower, en- 
larged. 7. Longitudinal section of flower, enlarged. 8. Longitudinal sec- 
tion of pistil, enlarged. 9. Stamen, enlarged. 10. Cross section of ovary, 
enlarged. 11. longitudinal section of fruit, one-half natural size. 12. Seed, 
enlarged. 13. Longitudinal section of seed, enlarged. 14. Embryo, en- 
larged. 
