Control of Tundra Plant Allocation Patterns and Growth 143 



VO 

 Moss Surface 



. ■■ ,J| | I M l ^ . ^ .■ )M.y,,„^.„y.yj^^l_ ; ^;.,i^ 



"• ■' '"' ^ ^ 1 T 



2 Jul 12 Jul 22 Jul I Aug II Aug 16 Aug 20 Sep 



Aug 



II Aug 



16 Aug 



FIGURE 5-2. Seasonal growth patterns of Dupontia tillers of different 

 age classes. Leaves are represented by lines inclined at 62 °, the mean leaf 

 inclination for Dupontia; the solid portion of the line represents green 

 leaf length and the dashed portion represents senesced length. The most 

 recently exserted leaf is inclined 90° until fully exserted. The inflores- 

 cence is represented with an arrow. [Drawn from data collected for 

 shoots (Mattheis et al. 1976), roots (Allessio and Tieszen 1975a, Shaver 

 and Billings 1975), and VO tillers (Lawrence et al. 1978) in 1973.] 



