Between Drosera filiformis and D. intermedia. 95 
are on the average 7 inch across, though they vary more than 
do those of the other parent. They are ofa purple-pink hue. 
The petals of D. intermedia are Y% inch across and of a pure 
white color. Those of the hybrid seem decidedly to approach 
the latter, since the flowers are 34 inch across, and are white 
with a faintly recognizable pink flush. 
(/) Floral Structure —The sepals form an exceptionally in- 
teresting study. Those of D. filiformis are abundantly covered 
externally with glandular hairs (Plate XII, Fig. 72) which vary 
greatly in structure and length. They may be from 180-380 u 
long. Generally it may be said that all of them end in a fiat- 
topped mass of 4—12 glandular cells, but the stalk supporting 
these may be a single cell row or two rows below gradu- 
ally running into one or two rows above. Each stalk also con- 
sists of 3-6 or 7 tiers of elongated cells. In the distal hairs 
of each sepal spiral trachee may enter the base of the 
hair and soon end blindly, or may be prolonged about one- 
third the length of the hair. Rosette-shaped, four-celled, 
sessile glands, and toward the base of the sepals two-celled 
glands of similar appearance, are also disposed over the 
exterior. Stomata are abundant, are nearly circular in out- 
line and measure 30 X 28 4. The internal (upper) epidermis is 
glabrous, and consists, like the upper epidermis, of very 
variable cells, alike in size and shape. In D. intermedia the 
outer surface of each sepal is glabrous, but a moderate num- 
ber of two-celled glands on a slight stalk cell, as well as 
stomata, occur over its surface. In D. hybrida, the outer surface 
of each sepal bears the same type of stalked gland hair as is 
seen in D. filiformis (Fig. 76), but here they are on the average 
only one-third to one-fourth the length of those on the parent 
species. But, like the parent, they vary in structure amongst 
themselves. Beside these are the four-celled sessile glands, 
which differ in no way as to size from the parent, each being 
30 # across. They are more scarce, however, than in the 
parent. We thus have the interesting case shown of one type 
