Agave filifera (Thread agave)
Origin: Central Mexico
Location: Temperate glasshouse
Agave filifera is a small or medium sized succulent plant that forms stemless rosette up to 3 feet (90 cm) across and up to 2 feet (60 cm) tall. The leaves are dark green to a bronzish-green in color and have very ornamental white bud imprints. The flower stalk is up to 11.5 feet (3,5 m) tall and is densely loaded with yellowish-green to dark purple flowers up to 2 inches (5 cm) long.
The specimen in the glasshouse reaches to the roof and hasn't flowered for ten years.