Parch Blight 



The kind of injury to plants, especially evergreens that 

 have been exposed to strong, drying winds in winter. 



Parenchyma 



(1) A common tissue in the soft parts of plants consisting 

 of thin-walled, cubical cells, e. g. pith, fleshy fruits. (2) The 

 loose tissue that forms a large part of the body of flat-worms. 



Parent Material (Soil) 



The C horizon (q. v.) of the soil. 



Parent Rock (Soil) 



The rock from which the parent material of the soil has 

 been formed. 



Parkland 



The type of landscape in which trees occur in clumps in 

 grassland. 



Parthenocarpy 



The development of the fruit of a plant without Fertili- 

 zation, e. g., as in the banana. 



Parthenogenesis 



The development of the egg of an organism into an em- 

 bryo without Fertilization, cf. Apomixis. 



Pasturage 



Herbage of an area taken by an animal when grazing, the 

 yield of a Pasture. 



Pasture 



An area of vegetation used for grazing, sometimes re- 

 stricted to areas of cultivated land which, have been seeded 

 and then used for grazing, cf. Range. 



Patabiont 



An animal that spends its normal life in the debris of the 

 forest floor stratum. 



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