86 Proceedings of Indiana Academy of Science 
literature on this subject are given and the same peculiarity in some 
other plants is noted. As indicated in that paper, interesting questions 
concerning the location, development, and reactions of the supernumer- 
ary stomata await solution. 
The outer epidermis of the sepal frequently shows twin stomata 
over one respiratory cavity’ (Plate I, Figure 9). The strands of proto- 
plasm often showed movement for 24 hours when magnified 450 times. 
The inner epidermis of the sepal, as the outer epidermis, has very 
wavy walls, but more pronounced than the outer epidermis in this re- 
spect (Plate I, Figure 10). Stomata are present, but few in number. 
In these cells the movement of the protoplasm often continued for as 
much as six hours during observation, as could be easily seen with 
moderate magnification. 
The epidermis from the outside of the petal of Trillium nivale 
showed, as usual, much elongated and narrow cells and with very wavy 
thin walls (Plate I, Figure 11). The epidermis from the inner sur- 
face of the petal has smaller cells than those of the outer epidermis, 
its cell walls are much less wavy and more delicate (Plate I, Figure 12). 
The above-mentioned facts coincide closely with similar observa- 
tions made on specimens of Trillium nivale which were obtained from 
the native habitat. Certain other points, such as some of those above 
referred to, deserve further study, which can best be carried out under 
the conditions described in this paper. 
EXPLANATION OF PLATE I. 
All of the figures of this plate are of Trillium nivale. 
Fig. 1. Pollen grain, surface view x 300. 
Fig. 2. Pollen grain after two hours in three per cent cane sugar 
plus one and one-half per cent gelatine x 300. 
Fig. 3. Pollen grain after three hours in the solution used for the 
grain shown in Fig. 2 x-300. 
Fig. 4. Epidermal cell from stem x 300. 
Fig. 5. Piece of cell wall of cell illustrated in Fig. 4, showing 
pits at K enlarged x 1060. 
Fig. 6. Cell from upper epidermis of leaf showing pits at H x 300. 
Fig. 7. Cell from midrib of upper epidermis of leaf x 100. 
Fig. 8. Few cells from lower epidermis of leaf x 100. 
Fig. 9. Twin stomata from outside of sepal x 520. 
Fig. 10. Few cells from inner epidermis of sepal x 100. 
Fig. 11. Epidermal cells from outside of petal x 100. 
Fig. 12. Epidermal cells from inside of petal x 100. 
* Andrews, F. M. Proceedings of the Indiana Academy of Science, 1914, pp. 209 
and 210, Fig. 1. 
