Acquired Habits in Plants

Abstract

AT p. 446 of NATURE, J. G. records a “dog violet” which he thinks has assumed an unusual form. As there are several plants called “dog violet,” and as one of them does in favourable situations attain a very considerable height, it would be interesting to know what was the species observed by the river Aled. The Viola canina (V. riviniana Reich.), in one of its forms which is probably a distinct species, has flowering shoots which sometimes attain a foot in length, and if supported by the surrounding vegetation do sometimes stand nearly upright, If this was the plant observed, J. G. only found a more than usually strong form.