QUADRATS 169 
the decimeter interval is small, and the centimeter square which corresponds 
is divided into twenty-five tiny squares. Each plant is put in whenever pos- 
sible, but mats, turfs, and mosses are merely outlined in mass if the individ- 
uals are not distinguishable. This holds true of all large rosettes and mats, 
even when they are single plants. Symbols were formerly used for indicat- 
re 
(*) 
- 
16 
Fig. 52. Chart of the quadrat shown in figure 51. Legend: a, And- 
rosace chamaejasme ; c,Carex rupestris; t, Tetraneuris lanata; p, Poten- 
tilla rubricaulis; as, Arenaria sajanensis; ar, Artemisia scopulorum; 
ag, Agropyrum scribneri; sa, Silene acaulis; st, Sicversia turbinata; d, 
Dasyphora fruticosa; al, Allium reticulatum; o, Oreoxis alpina. 
ing the various species. They have the advantage of requiring little space 
on the chart, and the disadvantage of necessitating constant reference to the 
legend. They are at present replaced by initials. By this plan, the decap- 
italized first letter of the generic name is used if no other genus found in the 
quadrat begins with the same letter. If, however, two or more genera begin 
with a, for example Agropyrum, Anemone, and Allium, the most abundant | 
