Heliotropum indicum ?
Observed near Magadi Road and Ngong Hills Kenya. December 2014.
FLOWERS: Small, bright white flowers arrayed on a long curving spike resembling a scorpion's tail.
PERENNIAL: A long-lived herbaceous perennial.
LEAVES: Leaves are alternate and triangular. The surfaces are hirsute.
RANGE: Origins of this plant are obscure because it was distributed around the world long ago through human transport.
FRUIT: The fruits divide into four nutlets.
UNARMED. No thorns.