diff --git a/src/gocam/translation/cx2/main.py b/src/gocam/translation/cx2/main.py
index bef6fcc..e0c28ef 100644
--- a/src/gocam/translation/cx2/main.py
+++ b/src/gocam/translation/cx2/main.py
@@ -48,6 +48,12 @@
     "Xenopus",
 ]
 
+# This graph was produced by the NDEx team based on the style attributes in our CX2 networks. This
+# image gets referenced in the network description. It seems a bit fragile to have this static image
+# with no process in place to update it if the style changes. But the NDEx folks were fairly
+# insistent that we include a legend graphic in the network description.
+LEGEND_GRAPHIC_SRC = "https://home.ndexbio.org/img/go-cam_legend_2024108_v2.png"
+
 
 def _remove_species_code_suffix(label: str) -> str:
     for code in SPECIES_CODES:
@@ -155,6 +161,7 @@ def _add_input_output_nodes(
             "@context": json.dumps(go_context.as_dict()),
             "name": gocam.title if gocam.title is not None else gocam.id,
             "prov:wasDerivedFrom": go_converter.expand(gocam.id),
+            "description": f"<p><img src=\"{LEGEND_GRAPHIC_SRC}\" style=\"width: 100%;\"/></p>"
         }
     )
     # This gets added separately so we can declare the datatype