DIVISION 17 
Marantas, Vallisneria, and most plants of tufted habit 
that root freely at the base. 
As a general rule the best season for the operation is 
just as new growth is about to commence. With hardy 
herbaceous plants the best and most vigorous pieces are 
obtainable from the outsides or margins of the clumps. 
The operation consists in digging up the masses and 
dividing them into convenient-sized pieces, then replant- 
B 
p) 
SURFACE RHIZOMES OF GERMAN IRIS SUITABLE FOR DIVISION. 
ing them in a suitable soil and position for their healthy 
growth and development. 
Runners. 
Certain plants, such as the Strawberry, Potentilla, 
and Saxifraga sarmentosa, send out slender prostrate 
stems called runners, producing roots and leaves at the 
nodes a short distance from the main tuft. These are 
capable of forming young plants. By this means of propa- 
gation numbers may be increased almost indefinitely. 
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