It was another 4 years before another missionary sent home a flowering specimen preserved in alcohol, and the plant was finally given a name, Physostigma venenosum.
2.
Julian also extracted stigmasterol, which took its name from " Physostigma venenosum ", the west African calabar bean that he hoped could serve as raw material for synthesis of human steroidal hormones.
3.
Robertson made several contributions in the field of ophthalmology; in 1863 he researched the effects on the eye made by physostigmine, an extract from the Calabar bean ( " Physostigma venenosum " ), which is found in tropical Africa.
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