Plant Association 



See Association. 



Plant Community 



See Community. 



Plant Cover 



See Cover. 



Plant Formation 



See Formation. 



Plant Geography 



The science that deals with the geographic distribution 

 of plants and the causes of their distribution and dispersal, 

 syn. Phytogeography, Synchorology. 



Plant Nutrient 



The substances or elements absorbed by a plant and used 

 in its metabolism, e. g., nitrates, phosphates, cf. Essential 

 element. 



Plant Unit 



The part of a vegetatively propagating plant which is con- 

 sidered as a unit in analyzing vegetation, e. g., each stalk of 

 plant that has rhizomes. 



Plantigrade 



An animal that walks on the entire bottom of the feet, 

 e. g., bear, man. 



Plant Sociology 



The study of plant communities, including their origin, 

 composition, structure, characteristics, distribution, dy- 

 namics, and classification, syn. Phytogeography. 



Plasmagene 



Gene-like, non-Mendelian carriers of hereditary charac- 

 ters, located in the Cytoplasm. 



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