The century plant is an agave, originally from Mexico, and when we first moved to California and found this plant growing along a path near our house, we were told the stalk grows only once a century. Believe me, in the 45 years I've been walking past this plant, I can assure you that bit of lore just plain ain't so. According to Wikipedia, "When it flowers, the spike with a cyme of big yellow flowers may reach up to 8 m (26 ft) in height. Its common name likely derives from its semelparous nature of flowering only once at the end of its long life. The plant dies after flowering, but produces suckers or adventitious shoots from the base, which continue its growth." Anyway, it's an impressive plant, and it's nice to see it continuing in good health after all these years.