>I think it usually is that the growing plants produce some substance that inhibits the germination of its or other species' seeds.
The purpose of allelopathy is to inhibit the germination of seeds of a potentially competitive species other than its own. If astragalus were allelopathic to itself, it would just be a footnote in rock garden literature. "A genus of desirable-looking plants whose sudden appearance in the fossil record some time during the Jurassic Period, followed by an equally sudden disappearance, is still a mystery ..." Bob _______________________________________________ Alpine-l mailing list [email protected] http://mailman.science.uu.nl/mailman/listinfo/alpine-l
