Mike: We had a discussion a while ago on this topic, probably before you were on the list. Black walnut and butternut produce the allelopathic chemical juglone, which can stunt growth or even kill certain plant species, although I have seen raspberries and a species of coneflower (Rudbeckia triloba, the branched coneflower), growing under black walnut trees.
Sugar maple and bracken fern have also been found to produce allelopathic chemicals that reduce germination and growth of competing plants. There are probably many other examples. Lee > --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected] -~----------~----~----~----~------~----~------~--~---
