200 Principles of Plant Culture. 
it. Transpiration should be reduced by sheltering the cut- 
tings from the direct rays of the sun. Movable screens 
placed over the bed during sunshine, and removed at other 
times, are preferable to whitening the glass, as the latter 
causes too much shade when the sun is not shining. 
Damping off, a much-dreaded disease causing cuttings to 
rot at the surface of the bed, is promoted by excessive heat, 
over-watering, or insufficient light or air; also by decom- 
posing organic matter in the material of the bed. Affected 
plants should be promptly removed and the cause of the 
trouble should be sought out and corrected. 
379. Green Cuttings should be Potted as Soon as 
Roots are formed, which may be detected by their foliage 
assuming a bright green color. They should first be placed 
in small pots, and, until they have commenced growth in 
these, should be treated precisely as before they were potted. 
Propagation by green cuttings includes three divisions, of 
which the requirements differ in some respects, viz., by cut- 
tings of herbaceous plants, of woody plants (381), and of the 
oe or parts of the leaf, (leaf cuttings) (382). | 
aR 380. How to Make 
Green Cuttings of 
Herbaceous Plants. 
Roots develop most 
readily from the 
younger and more suc- 
culent parts of the 
stem, in herbaceous 
plants. Bend the shoot 
Fic. 100. Fie. 101. near its terminus in 
Fig. 100. Cutting of chrysanthemum. 
Fig. 101. Rooted cutting of coleus. (Both after the form of a U, and 
Bailey). then press the parts 
together. If the stem breaks squarely off, with a snap, it is 
