Leaf Patterns. 
Mosaics, or close patterns, Fittonia. 
_ Advantage of mosaic arrangement. 
Leaves do not shade each other. 
Permit circulation of air. 
me ueR@sette) pattern, Gloxinia: 
2. Vines and climbers, ivies, Pellonia, trailing ribbon 
grass. 
Branch patterns, maple, pattern made during growth of leaves, 
Tree pattern, weeping elm, conifers. 
Imbricate pattern of short stems. 
Compare with rosette pattern, begonias. 
Spiral patterns, sunflower, mullein, chrysanthemum, Easter 
lily. 
Radiate pattern, grasses, dragon tree. 
Plants with narrow leaves and short stems. 
Cycads, palms, many ferns. 
Compass plants, vertical leaf arrangement. 
Open patterns. 
Presented by divided or branched leaves. 
Leaves next ground often entire or less divided. 
V. THE ROOT. 
Functions of the root. 
I. Anchorage and partial support. 
2. Absorption of liquid nutriment from the soil. 
Problems for solution by the plant. 
I. Permeation of the soil or substratum. 
2. Grappling the substratum. 
3. A congenial moisture or water relation. ? 
4. Distribution of roots for the purpose of reaching food 
laden soil. 
5. Exposure of surface for absorption. 
6. The renewal of the delicate structures for absorption. 
7. Aid in preparation of food from raw material. 
8. The maintenance of the required balance between the 
environment as a whole and the increasing or 
changing requirements of the plant. 
Correlation between root system of a plant and the form of the 
stem system and position of the leaves., as in, 
Its) 
