Keywords: RN Ulmus hollandica Commelin summer.JPG Ulmus hollandica 'Commelin' in summer; Photo by R Nijboer Ronnie Nijboer 2007 Ronnie Nijboer PermissionOTRS 2011072510013852 Cc-zero Original upload log en wikipedia RN+Ulmus+hollandica+Commelin+summer JPG 2008-08-07 09 22 Ptelea 1944×2592× 1847904 bytes <nowiki>Photo by R Nijboer 2007</nowiki> Ulmus cultivars Ulmus × hollandica |