440 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
bushy habit of growth are well shown in PLATE 10, which is from a 
photograph of a row of sister plants of the Ез generation. The 
numerous branches are slender and tough. The mature height 
of these plants in the first year of growth ranged from 26 to 32 
inches and in the second year (12 plants living) none exceeded 36 
inches in height. 
TABLE 54 
STATISTICAL CONSTANTS FOR ONE GENERATION (Fi) COMPRISING TWO SERIES OF A 
SEMI-ROBUST, BRITTLE-STEMMED RACE (RACE CONSTANTS FOR IMME- 
DIATE ANCESTRY GIVEN IN TABLE 53 
Pedigree [2] га p | tel a o dw 
Е. (А X Е»)-0-5-т- 
no. I 15.2 34 |-- 4.47 |390.52| 15.8 |-о.о1І | 66 
2214 15.5 33 |- 5.27 371.17 | 15.8 | —0.014 | 64 
Ne 15.6 39 |-І1.3І |488.3І | 16.5 | —0.023 | 72 
qn: I5.4 36 |-13.02 431.28| 16.6 | —0.034 | 70 
Е. (А X Е,)-0-5-6- 
HO. I 14.5 14 |— 5.28 106.17 | 15.2 |—0.051 | 37 
23 15.7 23 — 5.66 |108.82| 15.4 |—0.029| 47 
Дана 14.9 30 |- 8.19 371.41| 15.6 | -0.022 | 63 
аа 15.0 20 |- 6.45 167.33| 15.8 | —0.039 | 41 
5225 140 | 20 |- 8.48|153.29] 16.0 |-0.055 | 40 
2 a тк 4 24 |- 8.21 |230.04 | 16.0 0.035 | 49 
2:40 14.9 | 32 |—14.88 371.17 | 16.1 | —0.039 | 64 
туа 15.2 20 |--11.301305.15 | 16.2 | —0.033 | 58 
y тва 24 |—10.78 |216.41 | 16.4 0.052 | 49 
WE 15.6 32 |—10.57|408.91| 16.4 0.025 | 67 
шерт с. 15.4 26 |-І10.56 243.67 | 16.5 |-0.043 | 51 
y f I5.I 28 | —13.56|261.74| 16.5 |-0.051 | 55 
Нера i 15.7 | 27 |—10.49|287.75| 16.7 |—0.037 | 57 
^E 15.8 24 |- 9.72 |236.04 | 16.8 |—o.o41 | 49 
ud 15.5 | 33 |—16.61|411.96| 16.8 | —0.039 | 68 
er? 15.0 27 `|—10.76 |271.68 | 17.0 | -0.030 | 55 
" 24 151 | 30 |-<24.10 481.92 | 17.1 --0.05с | 69 
= 27 15-9 | 35 |—13.59/398.92] 17.1 |—0.034|65 
t NAE 15.8 29 17.74|408.77 | 17.1 | —0.044 | 69 
i xí 15.5 33 21.12 |403.22 | 17.2 |—0.052 | 65 
Пера 15.8 28 23.06 |439.67 | 17.3 | —0.052 | 68 
qu 16.3 | 27 |—11.87|289.10| 17.4 | —0.040 | 57 
pet 15.6 | 26 |—19.69|271.95| 17.5 |—0.073 | 55 
" 28 16.3 | 39 |—13.15|440.88 | 17.5 | —0.030 | 70 
x 20 16.0 | 37 |—16.31|386.27| 17.6 |—0.042| бі 
59 15.9 | 36 |--25.88 405.46 | 17.8 | -0.052 | 72 
"ng 16.4 26 |—15.93|157.50| 18.1 5| 51 
umi 16.8 | 27 |—15.23 |287.75 | 18.2 | -с.053 | 56 
2758 16.8 | 21 |--11.81 1181.31 | 18.2 |—0.0651| 43 
Full data for the performance of the series (Ex X A) —10-13— 
are given in TABLE 55. The values of a range from I7.I to I9.I 
with an average of 17.9 with a standard deviation of 40.59. 
For all plants the rate of change was a minus value. The rather 
