<div dir="ltr"><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small">I think it may be a soil condition, specifically a low pH from the accumulation of leaf debris. Stilt grass is known to prefer more basic soils. </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 28, 2015 at 8:46 AM, tomnjan2 <span dir="ltr"><<a href="mailto:tomnjan2@comcast.net" target="_blank">tomnjan2@comcast.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>There were areas that little light was clearly at play, but a blanketed grass area with a lone Holly still didn't have grass below. Tree heights were mixed, and many were in significant sunlight as well. This variety of holly is more open than common garden type.</div><div>Jan<br><br>Sent from my iPad</div><div><div class="h5"><div><br>On Sep 28, 2015, at 8:03 AM, "Hughes, Jake" <<a href="mailto:jake_hughes@nps.gov" target="_blank">jake_hughes@nps.gov</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">My guess is that light limitation is at work. Cole and Weltzin found the same pattern with paw paw (Asimina triloba):<div><br></div><div><p class="MsoNormal">Cole, P.G. and J.F.
Weltzin. 2005. Light limitation creates patchy distribution of an invasive
grass in eastern deciduous forests. Biological Invasions 7(3): 477-488.</p><p class="MsoNormal"><br></p><p class="MsoNormal"><br></p></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 28, 2015 at 6:27 AM, Marc Imlay <span dir="ltr"><<a href="mailto:ialm@erols.com" target="_blank">ialm@erols.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="#0563C1" vlink="#954F72"><div><p><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Any response for Tom and Jan?<u></u><u></u></span></b></p><p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:blue">Marc Imlay, PhD, </span></b><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:blue">Chair, Biological control working Group </span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1f497d"> </span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><u></u><u></u></span></p><p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:blue">Conservation biologist, Park Ranger Office, Non-native Invasive Plant Control coordinator.</span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:blue"><br></span></b><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:blue"><a href="tel:%28301%29%20442-5657" value="+13014425657" target="_blank">(301) 442-5657</a> cell </span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1f497d"><a href="mailto:ialm@erols.com" title="blocked::mailto:ialm@erols.com" target="_blank"><span style="color:blue">ialm@erols.com</span></a><b><br></b></span><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:blue">Natural and Historical Resources Division<br>The Maryland-National Capital Park and Planning Commission<br></span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1f497d"><a href="http://www.pgparks.com/" title="blocked::http://www.pgparks.com/
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blocked::http://www.pgpa" target="_blank"><span style="font-family:"Calibri",sans-serif;color:blue;text-decoration:none">www.pgparks.com</span></a></span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:blue"> </span></b><b><span style="font-size:10.0pt;font-family:"Times New Roman",serif;color:blue"> </span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><u></u><u></u></span></p><p><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><u></u> <u></u></span></b></p><p><u></u> <u></u></p><p><u></u> <u></u></p><p>-----Original Message-----<br>From: tomnjan2 [mailto:<a href="mailto:tomnjan2@comcast.net" target="_blank">tomnjan2@comcast.net</a>] <br>Sent: Monday, September 28, 2015 12:16 AM<br>To: Marc Imlay <<a href="mailto:ialm@erols.com" target="_blank">ialm@erols.com</a>><br>Subject: Stilt grass question</p><p><u></u> <u></u></p><p>Hi Marc, <u></u><u></u></p><p>Tom (Crone) and I were walking around the back end of Greenbelt Park today. He was checking on some multiflora rose he'd cut earlier as well stilt grass he cut. But I noticed something I hadn't before. There were large swathes of stilt grass that had bare patches within those areas. The common denominator was Holly tree leaf shed. We started searching elsewhere and found the same correlation. The stilt grass totally avoided wherever the dropped holly leaves landed. Have you seen this before, or know if there's a specific chemical in the leaf that inhibits or kills the grass? Or some other symbiotic relationship creating the inhibition? I'm really curious to know. As we were driving out of the park, I started looking at the mountain laurel and what I saw didn't seem to be surrounded by stilt grass either.<u></u><u></u></p><p><u></u> <u></u></p><p>thanks<u></u><u></u></p><p>Jan Steiner<u></u><u></u></p><p><u></u> <u></u></p><p>Sent from my iPad=<u></u><u></u></p></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div>Jake Hughes<br>Lead Biological Science Technician<br>Shenandoah National Park<br>3655 US Hwy 211 E<br>Luray, VA 22835<br><a href="mailto:Jake_Hughes@nps.gov" target="_blank">Jake_Hughes@nps.gov</a><br>Office: <a href="tel:540-999-3500%20ext%203492" value="+15409993500" target="_blank">540-999-3500 ext 3492</a> <br>Fax: <a href="tel:540-999-3697" value="+15409993697" target="_blank">540-999-3697</a><br></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><font face="comic sans ms, sans-serif" size="2">Earl "Bud" Reaves,</font><div><font face="comic sans ms, sans-serif" size="2">County Forester</font></div><div><font size="2"><font face="comic sans ms, sans-serif">Licensed Forester, </font><span style="font-family:Helvetica;background-image:initial;background-repeat:initial">ISA
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