224. DROSERA ANGLICA. . [Cuar. XIE 
CHAPTER XII. 
ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF 
DROSERA, 
Drosera anglica—Drosera intermedia—Drosera capensis—Drosera spathulata— 
Drosera filiformis—Drosera binata—Concluding remarks. 
J EXAMINED six other species of Drosera, some of them in- 
habitants of distant countries, chiefly for the sake of ascer- 
taining whether they caught insects. This seemed the more 
necessary as the leaves of some of the species differ to an 
extraordinary degree in shape from the rounded ones of 
Drosera rotundifolia. In functional powers, however, they 
differ very little. 
Drosera anglica (Hudson).*—The leaves of this species, which was 
sent to me from Ireland, are much elongated, and gradually widen from 
the footstalk to the bluntly pointed apex. They stand almost erect, 
and their blades sometimes exceed 1 inch in length, whilst their 
breadth is only the t of an inch. The glands of all the tentacles have 
the same structure, so that the extreme marginal ones do not differ 
from the others, as in the case of Drosera rotundifolia. When they 
are irritated by being roughly touched, or by the pressure of minute 
inorganic particles, or by contact with animal matter, or by the 
absorption of carbonate of ammonia, the tentacles become inflected; 
the basal portion being the chief seat of movement. Cutting or 
pricking the blade of the leaf did not excite any movement. They 
frequently capture insects, and the glands of the inflected tentacles 
pour forth much acid secretion. Bits of roast meat were placed on 
some glands, and the tentacles began to move in 1 m. or 1 m. 308.3 
and in 1 hr. 10 m. reached the centre. "Two bits of boiled cork, one of 
boiled thread, and two of coal-cinders taken from the fire, were placed, 
by the aid of an instrument which had been immersed in boiling 
water, on five glands ; these superfluous precautions having been taken 
on account of M. Ziegler’s statements. One of the particles of cinder 
* Mrs. Treat has given an ex- of Drosera longifolia (which is a syn- 
cellent account in ‘The American onym in part of Drosera anglica), of 
Naturalist,’ December 1873, p. 705, Drosera rotundifolia and filiformis, 
