GERMINATION OF TREES AND SHRUBS 



339 



GERMINATION IN OUT DOOR SEED BED 

 SEEDS PLANTED IN THE FALL OF 1917 

 The months of April and the first half of May. cool and dry; germi- 

 nation slow. Period oi unusual warmth during last half of May; period 

 of heavy rainfall first week in June. Seed bed subject to some wash- 

 ing in June. 



No. seeds 

 planted 



No. seeds 

 germinated 

 last week of 

 May 



Germinated 

 first week 

 of June 



Germinated 



second 



week of 



June 



Total No. 

 seeds ger- 

 minated by 



June 11 1918 



Quercus imbricaria 



(Keosauqua) 65 



Quercus imbricaria 



(Centerville) 70 



Quercus bicolor 



(Keosauqua) 20 



Quercus bicolor 



(Keosauqua) 9 



Quercus bicolor 



(Cedar river)* 18 



Quercus bicolor 



(Centerville) 



Quercus velutina 



(Keosauqua) 5 



Quercus velutina 



(Cedar river) 3 



Quercus velutina 



(La Crosse) 



Quercus macrocarpa 



(Keosauqua) 7 



Quercus ellipsoidalis 



(Osage) 150 



Quercus ellipsoidalis 



(Fairfield) 90 



Quercus rubra 



(Ames) 20. 



Gledit&ia triacanthos 



(Plant with hairy pods) 36 

 Crataegus mollis 



(Centerville) 17 



Crataegus coccinea 



(Fairfield) 90 



Fraxinus pennsylvanica 



var lanceolata 



(Mason City) 75 



Juglans nigra 



(Ames) 8 



Juglands cinerea 18 



Juglans cinerea 12 



Carya cordiformis 



(Iowa) 20 



Aesculus glabra 30 



May 15, 12 

 May 18, 1 



5 

 1 

 2 



1 

 May 10, 3 



io 



12 

 3 

 6 

 1 



3 

 3 



1 

 12 

 10 



13 



12 



4 



6 

 1 



41 



4 

 11 



23 



24 



7 



6 



1 



13 



3 



3 



6 



2 



53 



10 



18 



5 



1 



2 



Acer nigrum (seeded from campus trees), abundant. 

 Fraxinus pennsylvanica var. lanceolata (seeded from campus trees), 

 abundant; still coming. 



Eleagnus angustifolia (seeded from campus trees), free. 



