on characteristics such as Cover, Vitality, and Frequency. 

 cf. Association table. 



Station 



A particular location comprising a stand, part of a stand, 

 or a locality, cf. Habitat, Standort. 



Steady State 



See Homeostasis. 



Stele 



The central part of the stem or root of plants, includes 

 the pericycle, Phloem, Xylem, and pith when present. 



Steno- 



A prefix denoting a narrow range of Ecological amplitude 

 (q. v.) of an organism, e.g., stenothermal refers to tempera- 

 ture, stenophagous to variety in the diet, stenoky to number 

 of factors, stenohaline to salinity, stenohydric to water, cf. 

 Euroky. 



Steppe 



An extensive area of natural, dry grassland; usually used 

 in reference to grasslands in southwestern Asia and south- 

 eastern Europe, cf. Prairie, Pampas. 



Stereotaxis 



See Thigmotaxis. 



Stereo tropisiii 



The growth of a plant organ in response to contact with 

 an object, e.g., tendrils of vines coiling around a stem. 



Sterility 



The lack of ability of an organism to carry on Sexual 

 reproduction. 



Stigma 



The upper part of the pistil (carpel) of a flower, receives 

 the pollen and aids in its germination, cf. Pollination. 



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