The Collaborative International Dictionary of English v.0.48:

goldenrod \gold"en*rod`\, golden-rod
\gold"en-rod`\(g[=o]ld"'n*r[o^]d`), n. (Bot.)
   A tall herb (Solidago Virga-aurea), bearing small yellow
   flowers in a graceful elongated cluster. The name is common
   to all the species of the genus Solidago.
   [1913 Webster]

   Golden-rod tree (Bot.), a shrub (Bosea Yervamora), a
      native of the Canary Isles.
      [1913 Webster]

WordNet (r) 3.0 (2006):

goldenrod
    n 1: any of numerous chiefly summer-blooming and fall-blooming
         North American plants especially of the genus Solidago

U.S. Gazetteer Places (2000):

Goldenrod, FL -- U.S. Census Designated Place in Florida
   Population (2000):    12871
   Housing Units (2000): 5575
   Land area (2000):     2.593276 sq. miles (6.716555 sq. km)
   Water area (2000):    0.131169 sq. miles (0.339725 sq. km)
   Total area (2000):    2.724445 sq. miles (7.056280 sq. km)
   FIPS code:            26475
   Located within:       Florida (FL), FIPS 12
   Location:             28.612827 N, 81.294060 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Goldenrod, FL
    Goldenrod