344 NATURE-STUDY 



Much the same thing is seen in plants. There is a mi- 

 gration of species which is accomplished in many inter- 

 esting ways. Generally the parent plants give their chil- 

 dren a good "send off" and a travelling equipment that 

 enables them to make the journey. Many provide also a 



FIG. 140. A Neglected Corner is a Good Place for the Study of Seed Dispersal. 



store of food upon which the young plant may make a start 

 in life. 



A simple way of distribution is by the formation of runners, 

 suckers, stolons, rootstalks, tubers, bulbs, and roots. These 

 have already been referred to as means for propagation. 



Many of the lower plants multiply and are distributed by 

 what are called spores. These are small cells set free, often 

 in very great numbers, which float in the air or actually 

 swim in the water. Bacteria, algae, fungi, seaweeds, mosses, 



