bignoniaceae catalpa speciosa northern catalpa twig showing whorled leaf arrangement leaf scars circular bignoniaceae catalpa speciosa northern catalpa twig showing whorled leaf arrangement back lit venation of a catalpa leaf in antique rose emporium independence texas november 2 2018 bignoniaceae catalpa speciosa northern catalpa twig showing whorled leaf arrangement leaf venation catalpa speciosa northern catalpa tree a thumbnail 2390 25 back lit venation of a catalpa leaf bignoniaceae catalpa speciosa northern catalpa leaf simple whorled cordate can x large image cornaceae cornus florida flowering dogwood leaves opposite simple characteristic venation arching bignoniaceae catalpa speciosa northern catalpa leaf simple whorled cordate can leaf venation leaf venation western catalpa catalpa speciosa bark leaves and flowers 2016 966 01 htm similar leaf venation in botanic rhamnaceae berchemia scandens alabma supplejack leaf alternate simple with typically wavy caprifoliaceae viburnum nudum possumhaw viburnum twigs showing opposite leaf arrangement distinctly long terminal betulaceae ostrya virginiana hophornbeam leaf alternate simple doubly serrate margin aceae quercus pos willow oak twig showing alternate leaf arrangement delicate with small rubiaceae cephalanthus occidentalis mon onbush twig showing whorled leaf arrangement bignoniaceae catalpa speciosa northern catalpa twig showing whorled leaf arrangement leaf scars circular fabaceae cercis canadensis eastern redbud leaf alternate simple showing distinct heart aceraceae acer floridanum florida maple branch with twigs showing opposite leaf arrangement x large image leaves are more rubiaceae cephalanthus occidentalis mon onbush twig showing whorled leaf arrangement leaves are more observations supporting the morphogenetic role of the leaf margin and the alignment of growth a with 2016 965 26 htm similar leaf venation in aquatic plant greenhouse from a single leaf to a sea of green the predictive power of leaves for forest ecology to mark the two terminals of the longest and main vein of the leaf similar thumbnail of picture 1056 05 leaf venation