| 21. | Their leaves are usually entire and bear stipules.
|
| 22. | The paired stipules are leaflike and palmately lobed.
|
| 23. | Mature plants are usually leafless, with stipules fusing into scales to replace leaves.
|
| 24. | They have minute stipules or simply lack them.
|
| 25. | The bud scales enlarge with the growing shoot, and the innermost become stipules.
|
| 26. | Leaf stipules are not seen in this group.
|
| 27. | Leaves have stipules which are widened into membranous ochrea wrapped around the leaf bases.
|
| 28. | Leaves alternate, margins dentate, prickly, densely lanate beneath, stipules present.
|
| 29. | The leaves have sheathing stipules known as ochrea.
|
| 30. | These stipules are not sheath-forming.
|
