Fig. 114.—Diagram of Stomate of Iris (Osterhout).
Fig. 115.—Stomate of Ivy, showing compound guard-cells.
Stomates are very numerous, as will be seen from the numbers showing the pores to each square inch of leaf surface:
| Lower surface | Upper surface | |
| Peony | 13,790 | None |
| Holly | 63,600 | None |
| Lilac | 160,000 | None |
| Mistletoe | 200 | 200 |
| Tradescantia | 2,000 | 2,000 |
| Garden Flag (iris) | 11,572 | 11,572 |
Fig. 116.—Stomates of Geranium Leaf.
The arrangement of stomates on the leaf differs with each kind of plant. Fig. [116] shows stomates and also the outlines of contiguous epidermal cells.
