Use CSS3 in applications - Programming in HTML5 with JavaScript and CSS3 - page 279

In the case where you want to have the inline content wrap only on the left or the right,
you will specify either start or end respectively as the value for the wrap-flow property.
Figure 4-44 demonstrates the output if you change the value to start . Setting the value to
end will have the opposite effect.
FIGURE 4-44 Setting the wrap-flow property to the value start to have the content wrap only on the left
Figure 4-45 shows the effect if the wrap-flow property is set to clear . Both sides of the
exclusion object are cleared and the text wraps only along the top and the bottom.
FIGURE 4-45 Setting the wrap-flow property to the value clear to have the content wrap only along the
top and bottom