Very hairy stem. Flowers sparse up stem. Individual flowers relatively large.
Similar species: Blue-stemmed Goldenrod (Solidago caesia) - also has flowers in small clumps up the stem, but stem is very smooth. Gray Goldenrod (Solidago nemoralis) - also has a downy stem, but is much smaller. Bog Goldenrod (Solidago uliginosa) - does not have a hairy stem. Silverrod (Solidago bicolor) - white flowers.