This code system http://hl7.org/fhir/substance-source-material-species defines the following codes:

CodeDisplay
GinkgoBiloba Ginkgo biloba
OleaEuropaea Olea europaea
<status value="draft"/><experimental value="false"/><date value="2021-01-05T10:01:24+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/substance-source-material-species"/><content value="complete"/><concept><code value="GinkgoBiloba"/><display value="Ginkgo biloba"/></concept><concept><code value="OleaEuropaea"/><display value="Olea europaea"/></concept></CodeSystem>