GERMINATION STUDIES OF SOME SHRUBS AND 
TREES 
L. H. PAMMEL AND C. M. KING 
A study has been made by the Botanical Department of Iowa 
State College during the past season of the germination of the 
following : Quercus Gambellii, Pasania densfflora, Maclura pomi- 
fera , Prunus, caroliniana, Rhus Toxicodendron, Rhus canadensis, 
Gleditsia aquatic a, Rhamnus calif ornica, Rhamnus tinctoria ,• Ly- 
cium halimidorum and Shepherdia argentea. 
Descriptions of the seedlings of these plants, with an account of 
the conditions under which the seeds germinated are herein given. 
Previous papers may be found in Proceedings of the Iowa Acad- 
emy of Science. 
i 
Quercus Gambellii. Nutt. Gambell’s Oak. 
Locality of specimen, Salt Lake City; 
Collected September 16, 1921, by L. H. Pammel. 
These acorns were placed in soil on the greenhouse bench Oc- 
tober 1, 1921 ; they began to show sprouts above ground the 
middle of December. 
The acorn fruit of this species is almost sessile ; the cup is J4 
to 2/3 of an inch in diameter, hemispherical, covering about 1/3 
Fig. 1. Seedling of Quercus Gambellii. Acorns of the same oak 
Drawn by C. M. King 
