76 Richard H. Boerker 
the effect of size upon germination per cent, for many varieties 
of the same species. This study would also bring out some 
interesting relations between these varieties, as for example, cor- 
relating the size and weight of the seed with the site upon which 
the trees grew. Ri 
The largest and the smallest seeds were separated from the 
stock seed and counted, weighed, planted and carefully labelled. 
Of each variety of Pinus ponderosa 500 seeds were used except 
in the case of the California varieties. Due to the scant supply 
of these only 200 seeds of each of these were used. In the case 
of the Pseudotsuga taxifolia 200 seeds of each variety were used. 
After germination began counts were taken every other day. 
The tables below give the size of the seeds, weight of 500 seeds, 
the number of seeds per pound, the final germination per cent., and 
Size AND Weight of Seed IN RELATION To GERMINATION PER CENT. 
Pinus ponderosa 
Total Final Per Cent 
Soures or Vaviety | Sie | Mie | Seca] pete ieee ire 
Gm. | Cent Seeds 
South) Dakotaseaervsere Small 3-5 10.065 22,530 50.6 
Large 5-9 20.720 II,000 53.6 3.0 
Harney, Nee Saal eerormall 4-6 10.845 20,900 25.0 Le 
m Large 6-9 | 20.720 II,000 40.2 15.2 
Bitterroot, N. F., Mon. Small 5-8 | 19.050 II,900 7.6 ad 
Large 8-11 | 30.400 7,450 8.0 0.4 
Weiser, N. F., Idaho...| Small ART | 107-£00 13,250 60.0 ae 
Large 47-10 | 29.540 7,050 84.8 24.8 
Pecos Ne he Nees ees osmall 4-7 | 16.150 14,000 65.2 fae 
Large 7-9 23.470 9,650 | 73.4 8.2 
Califormniayees ese Small 4-II | 35.500 6,350 63.5 Bact 
Large II-14| 67.000 3,385 73.5 10.0 
PG eT ENUA RAS ems ee Small 7-10 | 26.000 8,725 8.0 Bs 
Large |10-14| 77.600 2,900 84.0 70.0 
Pseudotsuga taxifolia 
Caribou, N.F., Idaho...| Small ae 6.040 aa 225) || Bee 
Large |) 5. 8.290 mets 42.5 10.0 
Pecos Nae Nel ieaer ies Small la eee 5.450 er 65.0 Dee 
Large | AS 7.850 aes 69.0 4.0 
Wiashinetontmemcnceroe Simmel | 5c 3.780 ee 16.5 | 
Warcem wean: 6.450 wad 16.0 O55 
COMOPGIO> os d00500s000 Smalls. 3-750 cea 79.0 aan 
Ware ern tae 6.980 Hey, 88.0 | 9.0 
Madison, iN: Bey Montes) small) is: 3.350 ak 43-5 Beas 
Large ae 6.630 Liga 50.0 6.5 
