Resin duct hi-res stock photography and images - Alamy
Examples of stem transversal sections of experimental plants showing... | Download Scientific Diagram
File:Gymnosperm Leaves Resin Ducts in Two Needle Pinus (36501124165).jpg - Wikimedia Commons
Plants | Free Full-Text | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in Kielmeyera
Resin canal - Wikipedia
Resin Glands and Traumatic Duct Formation in Conifers | SpringerLink