Nolina siberica (Nolina sp. ‘La Siberica’) Central stem grows to 20′ tall, with 2″ wide, dark evergreen leaves, (does not show in picture) resembling a ponytail palm. White flower spike is 4-5′ tall. Still an unnamed species, one of the hardiest of all the nolinas, grows at 8,380′ in arid oak forest near the town of Nuevo Leon, near Siberica Mexico.