There may be one main stem, unbranched.
Silverrod is the only white-flowered goldenrod (aside from Upland White Aster (Solidago ptarmicoides), which looks like an Aster, but technically is a goldenrod!).
It's uncommon in Ontario, but there's lots of it in Eastern Canada (New Brunswick and Nova Scotia). The photos on this page are a mixture of Ontario and Nova Scotia specimens.
Or the main stem may branch part way up. Note that the arrangement of the flowers along the stem is vaguely similar to that of Blue-stemmed Goldenrod (Solidago caesia) - both species have small clusters of flowers along their main stem.
Sometimes Silverrod flowers have more yellow in them.
Closer view of the flowers.
Extreme close-up view of the flowers.
Often the flowers are rather scattered up the upper part of the stem.
Sometimes they are more closely packed.
Most of the flowers in this photo are still flower buds (end of August).
This shows the upper stem leaves - note how small they are.
The upper stem leaves are small.
Lower stem leaves are larger.
A lower stem leaf.
Basal leaves - they're large and usually still present at time of flowering.