@article {256,
	title = {Sertum Angolense},
	journal = {Transactions of the Linnean Society of London},
	volume = {27},
	year = {1869},
	pages = {10-11},
	author = {Welwitsch, F.M.J.}
}
@article {257,
	title = {Letters on the vegetation of West equinoctial Africa},
	journal = {The Journal of Linnean Society. Botany},
	volume = {3},
	year = {1859},
	pages = {150-152},
	author = {Welwitsch, F.M.J.}
}
