‘S6 
THE PLANT WORLD. 
unless in spots where they are unusually abundant. The same 
caution should be used against breaking branches from shrubs 
and trees in so rude a fashion as not only to cause a temporary 
disfigurement, but perhaps a permanent injury. The hobble-bush, 
whose effective leaves and brilliant berries decorate gaily the 
woods of late summer, is frequently a victim to careless picking. 
The flowers growing in the immediate neighborhood of the 
roadside are a joy to the many. Is it too much to ask that these 
be left to delight the eyes of the passer-by, and that the flowers 
desired for decorative purposes be sought a few feet from the 
highway or even from the trail? These roadside plants are con¬ 
stantly enjoyed by those who by reason of age or some infirmity 
could otherwise never see them. Were this once realized, few 
would hesitate to take the trouble entailed by half a dozen extra 
steps. 
Many of the most effective flowers may be gathered, away from 
the wayside, without fear of doing any permanent injury. 
Daisies, buttercups, clover, wild roses, meadow-sweet, steeple- 
bush, asters, goldenrod, and other vigorous and abundantly grow¬ 
ing plants will yield ample material for decoration, and may be 
gathered almost with impunity. 
To sum up we urge:— 
1. Moderation. (Not gathering too many flowers of the same 
kind in one locality.) 
2. Care. (The use of scissors or knife.) 
3. Judgment. (Guarding the roadside and conspicuous 
locations.) 
4. Occasional total abstinence. (In case of especially rare 
flowers.) 
THE TEACHERS DEPARTMENT. 
Edited by Dr. C. Stuart Gager. 
The Anti-ferment Reaction in Tropistic Movements of 
Plants. —Under the above caption Czapek (Ann. Bot., 19, 75, 
I 9°5) describes his recent experiments which will be of consid¬ 
erable interest to all teachers. In brief the experiments show 
