June, 1923] SINNOTT AND DURHAM — ANISOPIIYLLY IN ACER 
28l 
Table i. Mean, Standard Deviation, and Coefficient of Variability for the Various Size 
Characters in the Total Population and in the Four Leaf Groups 
M. 
a 
c.v. 
Num¬ 
ber 
Length of Midrib (cm.) 
29.0 dr .308 
Total . 
9.50 dr .059 
2.75 dr .041 
1000 
Vertical upper. 
772 dr .102 
2.44 dr .075 
31.6 dr I.I 06 
258 
Vertical lower. 
IO.59 ± .114 
2.73 dr .081 
25.7 dr .858 
258 
Horizontal right. 
9.86 dr .103 
2.37 dr .072 
24.O dr .815 
242 
Horizontal left. 
9.89 dr .108 
2.48 dr .076 
25.O dr .858 
242 
Length of Right Rib (cm.) 
34.1 dr .620 
Total . 
8.19 dr .055 
2.79 dr .042 
1000 
Vertical upper. 
6.85 dr .102 
2.43 dr .072 
35-6 dr 1.301 
258 
Vertical lower. 
9.07 dr .123 
2.94 dr .087 
32.4 dr 1.145 
258 
Horizontal right. 
8.85 ± .117 
2.70 dr .083 
30.5 dr I.O94 
242 
Horizontal left. 
7.98 dr .109 
2.51 d: .077 
31.5 dr I.I40 
242 
Length of Left Rib (cm.) 
Total . 
8.23 dr .060 
2.8l dr .042 
34.2 dr .621 
1000 
Vertical upper. 
6.86 dr .101 
2.4I dr .071 
35.1 dr I.27I 
258 
Vertical lower. 
9-12 dr .124 
2.97 dr .088 
32.5 dr 1.150 
258 
Horizontal right. 
8.06 dr .108 
2.49 dr .076 
3O.9 dr I.Il6 
242 
Horizontal left. 
8.80 dr .Il8 
2.72 dr .084 
3O.9 dr I.Il6 
242 
Width of Blade (cm.) 
Total . 
12.86 dr .084 
3-94 ± • 059 
30.6 dr .539 
1000 
Vertical upper. 
II .18 dr .153 
3.65 dr .108 
32.7 dr I.165 
258 
Vertical lower. 
1372 dr .177 
4.22 dr .126 
3O.7 dr I.067 
258 
Horizontal right. 
13.31 ± .159 
3.65 dr .112 
27.4 dr .957 
242 
Horizontal left. 
13.19 dr .l6l 
371 dr .114 
28.1 dr .989 
242 
Thickness of Blade (mm.) 
Total . 
.1607 dr .0004 
.0201 dr .0003 
12.3 dr .196 
1000 
Vertical upper. 
.1609 dr .0008 
.0200 dr .0006 
I2.4 dr .380 
258 
Vertical lower. 
.1608 dr .0008 
.OI95 dr .0006 
12.1 dr .369 
258 
Horizontal right. 
•.1603 dr .0008 
.OI9O dr .0006 
II.8 dr .373 
242 
Horizontal left. 
.1614 dr .0009 
.0202 dr .0006 
12.5 dr .394 
242 
Area of Blade (sq. cm.) 
Total . 
64.84 dr .734 
36.13 dr .528 
55-7 ± 1-257 
1008 
Vertical upper. 
47.60 dr I.090 
25.99 dr .770 
54.6 dr 2.429 
258 
Vertical lower. 
78.90 dr I.713 
40.81 dr I.2I3 
51.7 dr 2.210 
258 
Horizontal right. 
70.20 dr I.485 
34.30 dr 1.050 
48.9 dr 2.099 
242 
Horizontal left. 
68.40 dr I.448 
33.20 dr I.OI6 
48.5 dr 2.068 
242 
Volume of Blade (cc.) 
Total . 
I.O49 dr .0127 
.594 ± • OO89 
56.6 dr I.281 
1000 
Vertical upper. 
.757 dr .OI89 
.439 ± .0135 
58.O dr 2.648 
258 
Vertical lower. 
I.242 dr .0280 
.668 dr .0198 
53.8 dr 2.352 
258 
Horizontal right. 
I.II 2 dr .0239 
.553 ± .0168 
497 ± 2.145 
242 
Horizontal left. 
I.07I dr .0241 
.555 ± -0170 
51.8 dr 2.291 
242 
Length of Petiole (cm.) 
Total . 
8.35 dr .099 
4.64 dr .070 
55.5 ± 1-245 
1000 
Vertical upper. 
4.58 dr .093 
2.21 dr .066 
48.2 dr I.988 
258 
Vertical lower. 
II .17 dr .213 
5.07 dr .151 
454 ± 1-823 
258 
Horizontal right. 
8.85 dr .174 
4.00 dr .123 
45.2 dr I.816 
242 
Horizontal left. 
8.89 dr .177 
4.08 dr .125 
45.9 dr 1.913 
242 
Diameter of Petiole (mm.) 
Total . 
1.509 ± .0091 
.425 dr .OO64 
28.2 dr .489 
1000 
Vertical upper. 
I.236 dr .OI42 
•337 dr .0100 
27.2 dr .920 
258 
Vertical lower. .. 
I.679 ± .OI87 
437 ± .0130 
26.0 dr .873 
258 
Horizontal right. 
I.569 dr .OI74 
401 dr .0123 
25.6 dr .883 
242 
Horizontal left. 
1.572 dr .OI64 
.378 dr .0116 
24.O dr .819 
242 
