1.  What has stipular spines?
2.  What has polymorphic leaves?
3.  What has compound opposite leaves?
4.  What has winged stems or petioles?
5.  What has green twigs?
6.  What has angled or ridged stems?
7.  What has prickles?
8.  What has pinnately compound leaves?
9.  What has covered buds?
10. What has an excurrent growth form?
11. What has pubescent twigs?
12. What has unlobed leaves with entire margins?
13. What has capsules?
14. What has a crenate leaf margin?
15. What has round leaf scars?
16. What has pomes?
17. What has stalked buds?
18. What are the 4 dominant species of deciduous swamps (in SE MI)?
19. What has glands on the petiole (at the base of the leaf blade)?
20. What has pubescence on the back of the midrib?
21. What has acorn caps that cover less than 1/2 of the acorn?
22. What is a clonal shrub?
23. What are species that tend to be found in dry to dry-mesic sites
      (as compared to their wet to wet-mesic congeners [cousins])?
24. What is clonal by fragmentation?
25. What has catkins?