Anonidium usambarense - Anonidium usambarense was a tall tree in the Annonaceae family formerly endemic to Tanzania. A single specimen was collected in 1910 at Amani in the Usambara mountains at an altitude of 900m. In spite of intensive field work in the region looking specifically for this species no other examples were found and it was declared extinct in 1998. 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