d. )."Cerasus and .Rosa bacle strand: 
e. Mixed shrubby back strand. 
3. Arboreal back strand. 
a. Coniferous back strand. 
b: Populus back stran@y) 
ce. salix back strand. 
Quercus back strand. 
Mixed arboreal back strand. 
Another classification of strand formations. 
Lower beach, near water’s edge. \ 
Middle beach=mid-strand. 
Upper beach=back strand. 
Dominant plants of middle beach on Lake Michigan. 
American sea rocket. 
Bug seed. 
Sea-side spurge. 
Atlantic and Gulf coast. 
Sea rocket and spurge. 
Ores 
Seaward Zone. 
Cakile fusiformis, Seablite (Dondia linearis). 
Salsoia kali, Sea purslane (Sesuvium maritimum). 
Large burr grass (Cenchrus macrocephalus). 
Landward Zone 
Same plant and tropical morning glories (Ipomoea pes- 
caprae, I. acetosaefolia, trailing wild bean (Stroph- 
ostylis helvola). 
Dominant plants of upper beach. 
Artemgsia caudata. 
Artemgsia canadensis. 
Cnicus pitcher. 
Lathyrus maritimus. 
Seaside spurge. 
Oenothera biennis. 
Agropyron dasystachyum. 
Among shrubs, sand cherry and a species of wilow. 
Among trees, cottonwood, Populus monolifera and P. 
baisamifera. 
Plants in similar formations of beach plants. 
(Ipomoea pes-caprae and I. acetosaefolia). 
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