Solidago microglossa DC. (synonym: S. chilensis var. megapotamica) is native to South America.  It has densely hairy stems with long hairs (0.3-1 mm) and can be very robust in subtropical and tropical habitats (Lopez Laphitz 2009; Lopez Laphitz & Semple 2015).  The closely related S. chilensis has stems with shorter hairs (0.1-0.3 mm) or glabrous stems.

Solidago microglossa range draft JCS