<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Georgia;
panose-1:2 4 5 2 5 4 5 2 3 3;}
@font-face
{font-family:Papyrus;
panose-1:3 7 5 2 6 5 2 3 2 5;}
@font-face
{font-family:Heletica;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;
letter-spacing:.3pt;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;letter-spacing:.3pt">The brief conversations I’ve had with Philly Rain Check about these non-natives yielded the explanation that these trees have been proven to survive and
grow in an entirely unnatural environment and therefore are important from an ecosystem functioning perspective, regardless of their native/non-native status. This is not an apology for the list, which surprised me too when I first saw it.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;letter-spacing:.3pt">I have a hard time imagining that a yellowwood or Carolina Silverbell would thrive in harsh urban heat islands, at least as youngsters—they never have for
me. But maybe there’s a secret. It’s an interesting question.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;letter-spacing:.3pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Georgia","serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:Papyrus;color:gray">Beth Burnam, RLA<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Georgia","serif";color:gray">610-388-8396<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Heletica;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="161" height="169" id="Picture_x0020_1" src="cid:image001.png@01D28149.A0F67DB0" alt="BW_Logos_Final_Conservancy_Grey"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;letter-spacing:.3pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> MAIPC [mailto:maipc-bounces@lists.maipc.org]
<b>On Behalf Of </b>Nathan Hartshorne<br>
<b>Sent:</b> Tuesday, February 07, 2017 9:09 AM<br>
<b>To:</b> Muth, Norris (MUTH); MAIPC Listserve (maipc@lists.maipc.org)<br>
<b>Subject:</b> Re: [MAIPC] Philly Street Trees<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">So with some spare time due to rain, I googled up quite a few of the species on the list (but certainly not all). For the most part, it was difficult to find information since they are not as distributed or studied as plants like Norway
Maple. Many appeared in Invasives.org or Invasiveplantatlas, but didn't say much. Many of the cultivars are harder to learn about. Acer x freemanii is a cross between Red and Silver maples, so I am not sure what to even think about that, but it does easily
grow in a forest setting. Some species, like Carolina Silverbell and American Yellowwood are regionally non-native.<br>
<br>
It is good to note that generally it seemed that species not known for invasions were chosen. However, the four main caveats there are:<o:p></o:p></p>
</div>
<p class="MsoNormal">1) Maybe it can hybridize with natives or other introduced species<o:p></o:p></p>
</div>
<p class="MsoNormal">2) Callery Pear was infertile until people imported more trees and they could then cross.<o:p></o:p></p>
</div>
<p class="MsoNormal">3) Many species do not appear invasive, such as Autumn olive until one day suddenly, they are.<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">4) Accidental introduction of pathogen that kills natives. Hopefully this is more unlikely today, but who knows.<o:p></o:p></p>
</div>
<p class="MsoNormal">Here is some information I found:<o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">Aesculus hippocastanum <a href="https://www.na.fs.fed.us/fhp/invasive_plants/weeds/horse_chestnut.pdf">
https://www.na.fs.fed.us/fhp/invasive_plants/weeds/horse_chestnut.pdf</a><br>
<br>
Styrax japonicas <a href="http://www.njisst.org/files/plantidfactsheets.pdf">http://www.njisst.org/files/plantidfactsheets.pdf</a> - Listed as "moderate" as a threat code by the NJ Invasive Species Strike Team.<br>
<br>
Acer Campestre <a href="http://www.mortonarb.org/trees-plants/tree-plant-descriptions/hedge-maple-not-recommended">
http://www.mortonarb.org/trees-plants/tree-plant-descriptions/hedge-maple-not-recommended</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Other sources have said this has become invasive in some areas.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">Cornus Mas <a href="http://hvp.osu.edu/pocketgardener/source/description/co_mas.html">
http://hvp.osu.edu/pocketgardener/source/description/co_mas.html</a><o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">This source does call it invasive, but I didn't see much else. It does produce fruit that birds would love to distribute.<br>
<br>
Crataegus laevigata - Was listed as invasive in Canada, though I realize this cultivar may be less fertile (or more fertile).<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">I will write Lori Hayes and start a conversation. Let me know if you want to be individually added to it.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">-Nathan<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Fri, Feb 3, 2017 at 9:25 AM, Muth, Norris (MUTH) <<a href="mailto:MUTH@juniata.edu" target="_blank">MUTH@juniata.edu</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">Nathan,<br>
I’m glad you picked up on this. Perhaps someone on the listserve has a contact with Philadelphia Parks and Rec.<br>
<br>
My personal view is that we might want to try to move towards something of a white-list type of advice where MAIPC or others could work towards getting these lists moved more and more towards native species and non-invasives (dare I say, that have gone through
“extreme vetting?” I dare). If we could get some evidence-based information on where these non-natives have been used and for how long, it might be reasonable to give them a different designation than less well studied non-natives. I see this approach as entirely
a pragmatic one (I’d prefer that nurseries produced far more diversity and abundance of native species so that they would be easier to recommend or mandate) - but at least this approach could make some inroads towards these types of plantings doing less damage
and it might be more successful than a full frontal assault that could be more easily ignored and would be difficult to implement at best.<br>
<br>
Best,<br>
Norris<br>
<br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
Norris Z. Muth, Associate Professor of Biology<br>
<a href="mailto:muth@juniata.edu">muth@juniata.edu</a><mailto:<a href="mailto:muth@juniata.edu">muth@juniata.edu</a>><br>
<br>
office: 1054 VonLiebig Center for Science<br>
Office Hours Spring 2017<br>
M&F 11-noon, T 2-2:30, Th 1-2:30, or by appointment<br>
<br>
Juniata College<br>
1700 Moore St.<br>
Huntingdon, PA 16652<br>
tel: <a href="tel:814-641-3632">814-641-3632</a><br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
<br>
From: Nathan Hartshorne <<a href="mailto:nshartshorne@gmail.com">nshartshorne@gmail.com</a><mailto:<a href="mailto:nshartshorne@gmail.com">nshartshorne@gmail.com</a>>><br>
Date: Thursday, February 2, 2017 at 5:05 PM<br>
To: "MAIPC Listserve (<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a><mailto:<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a>>)" <<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a><mailto:<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a>>><br>
Subject: [MAIPC] Philly Street Trees<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
Hi all,<br>
<br>
My roommate was applying for an internship with them and came across the list of approved Philly street trees. Recently Philly has made a push for more planting similar to NYC's. Well, she knows a lot about invasives due to her proximity to me talking about
them. We were very disappointed to find a number of non-natives (regionally non-native as well). Other than crabapples (which I can't tell what species they are since they are all cultivars), I didn't immediately recognize any as commonly naturalizing, but
as we all know that doesn't mean much for the future, and doesn't do as much for the environment anyways.<br>
<br>
So I was wondering what we could do as an organization (aside from me writing a letter to them since I live here). An impact here could make a huge difference given the geographical size of the city. Perhaps any contacts with NYC million trees program could
be useful. Here is the list:<br>
<a href="http://www.phila.gov/ParksandRecreation/environment/Documents/PPR%20Approved%20Street%20Tree%20List.pdf" target="_blank">http://www.phila.gov/ParksandRecreation/environment/Documents/PPR%20Approved%20Street%20Tree%20List.pdf</a><br>
<br>
Nathan<br>
<br>
<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal">CONFIDENTIALITY NOTICE: The materials in this electronic mail transmission (including all attachments) are private and confidential and are the property of the sender. The information contained in the material is privileged and is intended
only for the use of the named addressee(s). If you are not the intended addressee, be advised that any unauthorized disclosure, copying, distribution or the taking of any action in reliance on the contents of this material is strictly prohibited. If you have
received this e-mail in error, please immediately notify the sender by replying to the e-mail, and then destroy it immediately. Thank you.<br>
_______________________________________________<br>
MAIPC mailing list<br>
<a href="mailto:MAIPC@lists.maipc.org">MAIPC@lists.maipc.org</a><br>
<a href="http://lists.maipc.org/listinfo.cgi/maipc-maipc.org" target="_blank">http://lists.maipc.org/listinfo.cgi/maipc-maipc.org</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</body>
</html>