What is (a) Yielding gum or resinous substances. (b) Pertaining to a natural order of trees and shrubs (Guttiferæ) noted for their abounding in a resinous sap called?

guttiferous — (a) Yielding gum or resinous substances. (b) Pertaining to a natural order of trees and shrubs (Guttiferæ) noted for their abounding in a resinous sap. (Webster's 1913.)

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