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Range DescriptionIt is scattered thinly, between Mann’s Spring and Bokwango Hut 3 on Mt. Cameroon (M. Cheek, pers. obs.). Its closest relative may be S. burchellii Otth., a species of montane eastern Africa. However, S. lynesii Norman is less geographically distant, occurring in the Tibesti as well as in S. Sudan and is also noted to occur on volcanic soils. Ten historic specimens are known, the earliest being the type, collected at Mann’s Spring in November 1862. It has also been collected above Buea at Huts 2 and 3, and so appears to be distributed around a good swathe of the mountain, perhaps around its whole circumference.