STUDIES IN THE GERMINATION OF SOME WOODY 
PEANTS 
h. H. PAMMEL AND C. M. KING 
The following brief study is a continuation of those previously 
reported to the academy. In the past these papers have been 
published in the Report of the Academy. One paper is in the 
hands of the Secretary. It is hoped to finally report on the germi- 
nation of all of the native woody plants of Iowa, as well as the 
germination of a few exotics. In a study of the germination of 
these plants one is apt to notice striking characters, that cannot 
well be described. For instance, the young dogwood plants have 
an aspect peculiar to the family. For the first time, this year, 
a study has been made of the sugar maple (Acer saccharum) . 
The glaucous character of the under surface of the leaf is just 
as pronounced in the young plants as in older leaves. Some 
seeds, like the maple, walnut and oaks, make a rapid progress in 
growth during germination. The eleagnus or oleaster on the 
other hand makes little progress at first. 
Seeds of trees and shrubs were placed in the garden for strati- 
fication October 25, 1920, and transferred to soil in the green- 
house March 15, 1921. 
Germinations were as follows: Beech (from White Lake, 
Michigan) ((already sprouting) March 16, 1921. 
Sugar maple (already sprouting) March 17, 1921. 
Ptelea trifoliata (from Keokuk, Iowa) April 1, 1921. 
Cornus Amomum (from Mason City, Iowa) April 1, 1921. 
Cornus Amomum (from Avoca, Iowa) April 1, 1921. 
Hemlock (from White Lake, Michigan) April 2, 1921. 
Pecan (from Iowa) April 7, 1921. 
Seeds of the following were not yet showing germination March 
L 1921 : Mountain ash, speckled alder, paper birch, cherry 
birch. Arbor vitae, soft maple, Rosa blanda, R. setigera, Cornus 
paniculata, Rhus glabra, Yucca, dewberry, Cornus circinata, Car- 
pinus Caroliniana, papaw, Symphoricarpos occidentalis, Robinia 
Pseudo-Acacia, Sorbus sc andia. Viburnum Opulus, Tilia ameri- 
cana, sycamore and Bvonymus. (The sycamore, Evonymus and 
