Sansevieria robusta

A very common sight in Kenya in dry bush land at altitudes between 600 and 1500m.
The species is often confused with S. ehrenbergii but this occurs mainly in Arabia.
In the younger stages, both species have their leaves growing in all directions. At the mature stage, they show distichous growth; in other words, the leaves then grow in two ranks, like a fan. They have a bluish cast in S. ehrenbergii, whereas in S. robusta they are darkish green (almost yellow in the wild when growing in full sun). In S. robusta the back of the leaves shows 14-30 longitudinal darker green lines.  In S. ehrenbergii this is not he case; only in very mature leaves there are some faint markings.
Mature plants of S. robusta have erect stems to 60 cm tall, each with 6-14 leaves to over 2 m long.
The inflorescence is 0.8-1.4 m tall, with white or greenish flowers.

The pictures were taken between Baragoi and South Horr, 23 Sept. 2015.

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Sansevieria arborescens

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.

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