160 



DISPERSAL OF SEEDS 



277. Tlie expanding balloons of the milkweed. 



tulip-tree, ailanthus, and maple; those which have feathery 

 buoys or parachutes to enable them to float in the air. 

 Of the latter kind are the fruits of many composites, in 

 which the pappus is copious and soft. Dandelion (Fig. 



