Cephalosphaera usambarensis

References

1. [1]Flora of Tropical East Africa — Beentje H.J. · Royal Botanic Gardens; Kew. · 2002 · http://plants.jstor.org/search?st=396814 ↩︎Available on-line, a modern flora of East Africa.
2. [2]IUCN Red List of Threatened Species — http://www.iucnredlist.org/ ↩︎A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
3. [3]Tropical Timbers of the World. Ag. Handbook No. 607. — Chudnoff. Martin. · USDA Forest Service. Wisconsin. · 1984 ↩︎Terse details on the properties of the wood of almost 400 species of trees from the Tropics.