Photo via Reddit, where ptbus0 identifies it as Pachycereus weberi and offers another impressive photo.
For the connection of this cactus to Stevie Nicks, see my post in January about fasciation and white winged doves, which includes a video during which she tells the story of the white winged doves and the death of John Lennon.
And here's the song. In two parts. Set your loudness to 11!
p.s. - "Edge of Seventeen" is a mondegreen arising from her hearing Tom Petty's wife pronounce "age of seventeen."
Originally posted in 2011.