Scientific NameSolidago altissima
Other Common Names:
solidago altissima var. altissima
solidago altissima var. pluricephala
solidago altissima var. procera
solidago canadensis var. scabra
Synonyms (former Scientific Names):
Solidago canadensis var. scabra
Erect perennial weed that is often 1 to 2 m tall. Sparsely branched on the upper half of the plant only.
Elliptic to lanceolate in shape and 6 to 15 cm long and 1 to 3 cm wide. Older leaves have petioles and younger leaves can be sessile. Older leaves will also senesce and eventually fall off. Leaves are pubescent on both surfaces.
This weed grows from underground rhizomes and slowly spreads. Stems are very pubescent and the leaves are pubescent as well. The inflorescence is only at the terminal and is almost panicle like.
Flower Seed Head
Panicle like, clusters of 10 to 20 flowers that are yellow. Each individual flower is 2 to 3 mm across.
The fruit is an achene that is 1 to 1.5 mm long and has a papus on one end. The papus looks like fibers protruding from the end of the achene.
Fallow fields, pastures, meadows, and roadsides.
upright and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval