Sporophyte 



The part, or asexual generation, of the life cycle of 

 plants in which the cells contain the Diploid (or Polyploid) 

 number of chromosomes, begins with Fertilization, pro- 

 duces Spores, e.g., a flowering plant, a fern. 



Sport 



A vegetative or Somatic Mutation (q. v.) in an organism, 

 e.g., a shoot differing from other shoots arising from a bud 

 on a plant. 



Speculation 



The rapid formation of Spores by fission as in many 

 bacteria, molds, algae, and protozoons. 



Spread 



The combined results of dispersal and of the establish- 

 ment of the individual and then the species in a new place, 

 cf. Dispersal, Establishment. 



Sprigging 



The planting of a part of the stem and root system of 

 a grass. 



Spring Overturn 



The mixing of water in lakes after the ice melts, result- 

 ing in a uniform temperature from the surface to the bottom. 

 Another mixing occurs in the autumn, the Fall overturn. 



Springtail 



See Collembolon. 



Spring Wood 



The portion of the annual woody growth of a tree or 

 a shrub that is formed in the early part of the growing 

 season; it is more porous than the Summer wood (q. v.). 



Sprout 



The first growth or shoot from a seed, root, or other plant 

 part; or a tree that has grown from a stump or root. 



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