Solidago microglossa

Solidago microglossa is a South American plant species in the family Asteraceae. It is native to Brazil, Bolivia, Paraguay, Uruguay, and northern Argentina.
Solidago microglossa is a perennial herb up to 100 cm tall, spreading by means of underground rhizomes. The leaves are thin and lance-shaped, up to 7 cm long; leaves get progressively smaller higher up on the stem. One plant can produce many small yellow flower heads in a large, branching, conical array at the top of the plant.