Perhaps we should remember the issue of provenance when assessing the invasion potential of introduced plants. Different regional populations, and, indeed, individuals, may have differing capacities to exploit new territory. I'm not suggesting that this is necessarily relevant to the buckthorn problem, just that it's a factor to consider when invasiveness reports appear contradictory. -----Original Message----- From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Adam Fikso Sent: Wednesday, March 17, 2010 10:35 AM To: Pacific Bulb Society Subject: Re: [pbs] Legacy bulbs-desirable plants or weeds Thanks Boyce. I didn't know this about European Buckthorn. Off topic do you have anything about the relevant factors here?? ----- Original Message ----- From: "Boyce Tankersley" <btankers@chicagobotanic.org> To: "Pacific Bulb Society" <pbs@lists.ibiblio.org> Sent: Wednesday, March 17, 2010 10:05 AM Subject: Re: [pbs] Legacy bulbs-desirable plants or weeds > Hi Kathleen: > > Our experience at CBG strongly suggests that invasiveness is very much a > regional characteristic. For instance in the Chicago area Buckthorn is > invasive but in other regions experiencing a zone 5 climate it is not >