Q:Oligoneuron houghtonii - Oligoneuron houghtonii (syn. Solidago houghtonii) is a rare species of flowering plant in the aster family known by the common name Houghton's goldenrod. It is native to southern Ontario in Canada and northern Michigan in the United States. It is threatened by the loss and degradation of its habitat. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Plant