Oxydendrum Arboreum Sourwood Seedlings now green husks containing black walnuts Vines green husks containing black walnuts in October after its leaves have fallen and texture Vigorous bright green new leaves form each year and provide a unique texture and depth to a multi layered canopy․ Flowers are borne in summer months‚ and are small‚ lightly fragrant‚ cascade like clusters of white flowers that attract pollinators․ The leaves of the tree turn crimson‚ orange‚ scarlet or burgundy in autumn‚ making it one of the most flamboyant of autumnal foliage trees in North America․ Its naturally elegant branching habit also provides interest in the landscape during the winter months‚ making it an attractive addition in every season of the year․