The photo I linked to of Urera baccifera in the last link, the fieldmuseum, doesn't look to have spines on Myriam. I clicked on the link for herbarium specimums. there's different leaf shapes there from different locations ..
http://fm1.fieldmuseum.org/vrr...
Clicking from a link from the herbarium brings you back to several photos of the live plant.
http://fm2.fieldmuseum.org/pla...
Spines on some plants are barely noticeable, I imagine if there was small spines on your plant they wouldn't show unless you have a closer shot.
Urera nitida isn't listed on that site.
Urera baccifera is accepted on the Plant List, but is in review. It also has synonyms giving different varieties which suggest it does vary.
http://www.theplantlist.org/tp...
Urera nitida is also accepted, but in review.
http://www.theplantlist.org/tp...
Could they both be variations of the same plant?
