This is a Sansevieria, commonly known as a "snake plant" or (my favorite) "mother-in-law's tongue." This one just bloomed this spring. I cannot claim "green thumb" status because I understand they likely bloom when they are stressed. I have had other succulents that burst into gloriously ridiculous tall stalks of flowers and then promptly died, so I feel I am not a good influence on their longevity. I have never seen a snake plant bloom, though, so this is cool.