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NOTE TO MR. FRANCIS DARWIN'S PAPER.¹

I beg leave to say that I have witnessed almost all the facts described in the foregoing paper, and can vouch for their accuracy. To the best of my judgment, the whole case is a most remarkable one, and well deserves the attention of physiologists.

CHARLES DARWIN.

¹ F. Darwin. 1877. On the protrusion of protoplasmic filaments from the glandular hairs on the leaves of the common teasel (Dipsacus sylvestris). Quarterly Journal of Microscopical Science 17 (July): 245-272, 1 plate. See F. Darwin 1877b and Darwin 1878.