They are flat and thin.
Many of them are very broad.
Some of the leaves on a single branch are larger than others on the same branch, and some have longer stems than others.
Most of them have a rather dark glossy upper surface and a lighter rougher under surface.
FIG. 59.
To show transpiration. Plant A was set in the sunlight, plant B was left in the darker part of the room. A has transpired much more than B, showing that sunlight is necessary for this work.[ToList]
FIG. 60.—AMOUNT OF TRANSPIRATION
This plant transpired within 48 hours an amount of water equal to the colored liquid in the bottle standing on the jar, more than 6 ounces.[ToList]