i) 
es 
OHIO STATE ACADEMY OF SCIENCE. 7 
e. Mosaic arrangements. 
f. Rain-shedding devices. 
g. Deciduous leaves. 
h. Leaves which cover their axillary buds. 
Winter protection of buds. 
Winter hycrcohytic buds. 
Selfpruning of woody plants. 
Vegetative propagation; as in the Raspberry, 
Walking Fern, Willow twigs, and leaf propagation of 
Roripa. 
6. 
Whe 
8. 
9. 
night. 
10. 
it ita 
12. 
nation. 
ies 
T4. 
Stems. 
a. Heliotropic movements of stems. 
b. Fasciation, plants in which it is most common, 
and probable cause. 
c. Witches’ brooms. 
Roots. 
a. Relation to soil and water. 
b. Aerial roots. 
c. Prop-roots. 
d. Storage organs. 
e. Root contraction. 
Coloration. 
a. Spring and Autumn coloration. 
b. General coloration of leaves, stems, and roots. 
c. Colors of flowers and fruits. 
Closing of flowers during cloudy weather and at 
Night-blooming plants. 
Floral clock. 
Plants with anemophilous and hydrophilous polli- 
Mechanical devices for throwing pollen and spores. 
Seed distribution. 
a. Mechanical devices for throwing seeds, as in 
Acnida, Impatiens, and Hamamelis. 
b. Distribution by water. 
Distribution by wind; wings, plumes, pappus, 
tumbleweeds, distribution over ice. 
Q 
