HOW PLANTS SPREAD AND MULTIPLY 43 
in the autumn, and goes travelling. If it meets with 
others the branches become entangled, and the wind 
continues sweeping them vigorously along until balls may 
be seen careering over the sand as large as a cartload of 
hay, ready to found a most varied colony if the wind will 
only take them to water, and not leave them to dry up 
altogether and die upon the sand. 
LIME SEED, ASH SEED. DANDELION SEED. 
You must have noticed some of the sailing arrange- 
ments on common seeds. Amongst the trees we have the 
winged fruit of the Elm, the pretty parachute of the 
Lime, and the boomerang blades of the Ash. Most of 
us have often started the seeds of the Dandelion, with 
their white sails spread, to hurry over the fields, and 
