As the name implies, plants of this species can become quite tall (as Sansevierias go). Actually, it rather looks like a Yucca.
The stems are up to 1.5 m tall, branching at or near the base, with many leaves. These are 20-45 cm long and 2-4.5 cm wide, with a whitish or reddish margin and usually somewhat twisted.
The species is locally very common in lowland thornbush in Kenya and Tanzania.
The pictures were taken on 4 October 2015 in the Bamba area (Kilifi district, Kenya) at altitudes between 160 and 230 m.