needed - A condition in wMch ^'^'^"il^^-Jrs'ov:.^!^"^/'^!^:"'. "runoff 

 ITS,-::- Jr^nr/onndinrk^res^infi^rf^orM,. UdL, o. an. co.Mna- 

 tion of sources. 

 Flora - A list of all plant species that occur in an area. 



^ ^^^^' ^.^..ndation or soil satu ra t ion) - ^^i;i:ill\;%t;::;:T\Z' " 



area by surtace water or lll^^^^l'^;-'- Jlul^lZ ol saturated at least 

 'TrJci re"%-;^; llrl'lTlTlrl..., season per 100 years or as a 1-. 2-, 

 5-year, etc., inundation frequency. 



.„.,..ncv (vegetation) - The distribution of individuals of a species in an 

 ^^^J^ — It is quantitatively expressed as 



Number of samples con taining species A ^ ^qq 

 Total number of samples 



More than one species .ay have a frequency of 100 percent within the sa»e 



area. 



s-^i-s -tarcrnL^- t:rtLrro?e-«^r^^^ 



in any year or more than 50 times in 100 years) . 



Gleyed - A soil condition resulting from P-^o^ged soil saturation which^s^ 



Si^sted by the presence of bluish ^^J^-^/^^^^f^^Gleying occurs under 



or in mottles (spots or streaks --^ °^^- satura;ion: by which iron is 



reducing soil conditions resulting from soil saturation, y 



reduced predominantly to the ferrous state. 



Ground water - That portion of the water below the ground surface that is 



under greater pressure than atmospheric pressure. 



Th. nortion of the year when soil temperatures at 19.7 inches 

 '^ri^m -su^r^LrlreTi-sLr thL biolo.ic .ero O^^C, (OS Be^art.ent of 



tSntriod :.Tl\ rp-rirt^d ry";rn::^rr-of rrLt-free days (OS Oepart- 



ment of the Interior 1970). 



H.Mtat - The environment occupied by individuals of a particular species. 



population, or community. 



Headwater flooding - A situation in which an area becomes inundated directly 



by surface runoff from upland areas. 



Sf^i:n:s"rroiyT.rtrfinfiudir:rnSrth:r-r;esrtr3Trt';n 



height are considered to be herbs. 



* See references at the end of the main text, 



A5 



