an area which shows more even spacing than can be expected 

 by chance. Syn. Under-dispersion. cf. Hyper dispersion, Nor- 

 mal dispersion. 



Hypogeal 



Refers to Cotyledons which remain underground after 

 seed germination, e.g., the pea seed. cf. Epigeal. 



Hypolimnion 



The non-circulating body of water in lakes below the 

 Thermocline. cf. Epilimnion. 



Hyponasty 



The more rapid growth of the under side of an organ 

 such as a leaf than of the upper side. 



Hypoplasy (Hyperplasis) 



The reduction in the number of cells in an organ, e.g., 

 in certain plant galls. 



Hypsometer 



An instrument for measuring the height of an object, 

 especially a tree. 



Hythergraph 



A graphic presentation of climatic conditions in which 

 one coordinate is the mean monthly temperature and the 

 other is the mean monthly precipitation, cf. Climagraph. 



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