<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><img apple-inline="yes" id="109639C6-BFCA-4068-B966-F43121264466" height="320" width="240" apple-width="yes" apple-height="yes" src="cid:22EAE943-3D18-49ED-93A8-B9EE2C0E5F78@fios-router.home" class=""><br class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Sep 8, 2016, at 12:54 PM, Kathryn Peterson- Lambert <<a href="mailto:triplam747@aol.com" class="">triplam747@aol.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><font size="4" face="Arial, Helvetica, sans-serif" class="">
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<font size="4" face="Arial, Helvetica, sans-serif" class="">Friends, In order - here are pics of (1) lesser Celandine in spring - no grass, complete take-over (2) pics are the replacement grass from an urban park area, open space, coastal plain, city of Virginia beach - they mowed it completely, and (3) the replacement grass that covered the open space park lawn completely. Only a small portion was in Fescue grass which took a side line. Lesser and Greater Celandine can create allergic reactions to <u style="font-weight: bold; font-style: italic;" class="">some</u> people and also cause yellow dying of clothing materials, shoes, etc. </font><a href="https://mail.aol.com/IM/?sn=triplam747&locale=en_US&pd=0" target="_blank" style="font-weight: lighter; font-size: 10px; font-family: Verdana, Arial;" class=""><img align="absmiddle" border="0" src="https://api.aim.net/presence/icon?k=sr1DFCvn2e83VRmK&t=triplam747" class=""></a><span style="font-family: Arial, Helvetica, sans-serif; font-size: large;" class=""> Kathryn Peterson-Lambert</span><font size="4" face="Arial, Helvetica, sans-serif" class=""><br class="">
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<div style="font-family: arial, helvetica; font-size: 10pt;" class="">-----Original Message-----<br class="">
From: maipc-request <<a href="mailto:maipc-request@lists.maipc.org" class="">maipc-request@lists.maipc.org</a>><br class="">
To: maipc <<a href="mailto:maipc@lists.maipc.org" class="">maipc@lists.maipc.org</a>><br class="">
Sent: Thu, Sep 8, 2016 9:09 am<br class="">
Subject: MAIPC Digest, Vol 59, Issue 19<br class="">
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Today's Topics:<br class="">
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1. Re: What grows after lesser celandine dies back ? (Marc Imlay)<br class="">
2. Re: Fallopia japonica (Richard Gardner)<br class="">
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Message: 1<br class="">
Date: Thu, 8 Sep 2016 08:39:37 -0400<br class="">
From: "Marc Imlay" <<a href="mailto:ialm@erols.com" target="_blank" class="">ialm@erols.com</a>><br class="">
To: "'Tayerle, Lisa'" <<a href="mailto:lisa.tayerle@montgomeryparks.org" target="_blank" class="">lisa.tayerle@montgomeryparks.org</a>>, "'John<br class="">
Ambler'" <<a href="mailto:john.ambler@verizon.net" target="_blank" class="">john.ambler@verizon.net</a>>, <<a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a>><br class="">
Subject: Re: [MAIPC] What grows after lesser celandine dies back ?<br class="">
Message-ID: <<a href="mailto:001e01d209ce$100d3660$3027a320$@erols.com" class="">001e01d209ce$100d3660$3027a320$@erols.com</a>><br class="">
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I just spray it early in late Winter, not in Spring, to successfully avoid<br class="">
damage to natives. <br class="">
<br class="">
<br class="">
<br class="">
<br class="">
<br class="">
Marc Imlay, PhD <br class="">
Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland<br class="">
Chapter of the Sierra Club.<br class="">
<br class="">
<br class="">
<br class="">
Marc Imlay, PhD, Chair, MAIPC Biological control working Group Conservation<br class="">
biologist, <br class="">
<br class="">
Park Ranger Office, Non-native Invasive Plant Control coordinator.<br class="">
<<a href="mailto:Marc.Imlay@pgparks.com?" target="_blank" class="">mailto:Marc.Imlay@pgparks.com</a>> <a href="mailto:Marc.Imlay@pgparks.com" target="_blank" class="">Marc.Imlay@pgparks.com</a><br class="">
<br class="">
(301) 442-5657 cell Natural and Historical Resources Division<br class="">
<br class="">
The Maryland-National Capital Park and Planning Commission<br class="">
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<br class="">
<br class="">
<br class="">
<br class="">
From: MAIPC [<a href="mailto:maipc-bounces@lists.maipc.org?" target="_blank" class="">mailto:maipc-bounces@lists.maipc.org</a>] On Behalf Of Tayerle,<br class="">
Lisa<br class="">
Sent: Thursday, September 08, 2016 8:03 AM<br class="">
To: John Ambler <<a href="mailto:john.ambler@verizon.net" target="_blank" class="">john.ambler@verizon.net</a>>; <a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a><br class="">
Subject: Re: [MAIPC] What grows after lesser celandine dies back ?<br class="">
<br class="">
<br class="">
<br class="">
I have an area that is thickly coverer by lesser celandine. But I still have<br class="">
Mayapples, Christmas ferns, Jack-in-pulpits and toothwort coming up through<br class="">
it. Not much else because it is heavily deer browsed. But I have had trouble<br class="">
spraying the LC in the spring because of the number of Mayapples that are<br class="">
poking through.<br class="">
<br class="">
<br class="">
<br class="">
From: MAIPC [<a href="mailto:maipc-bounces@lists.maipc.org?" target="_blank" class="">mailto:maipc-bounces@lists.maipc.org</a>] On Behalf Of John Ambler<br class="">
Sent: Thursday, September 08, 2016 5:42 AM<br class="">
To: <a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a> <<a href="mailto:maipc@lists.maipc.org?" target="_blank" class="">mailto:maipc@lists.maipc.org</a>> <br class="">
Subject: [MAIPC] What grows after lesser celandine dies back ?<br class="">
<br class="">
<br class="">
<br class="">
In sites dominated by lesser celandine in the spring, what grows<br class="">
subsequently in the summer after its tops die down? If you have observed<br class="">
this, could you please post about it? <br class="">
<br class="">
<br class="">
<br class="">
Observations over the years as lesser celandine gets dominant on flood<br class="">
plains or moist slopes with spring wildflowers would be especially helpful.<br class="">
<br class="">
<br class="">
<br class="">
If invasion by lesser celandine favors invasion of other unwanted plants,<br class="">
this could help in arguing for control of it in natural areas by winter<br class="">
spraying (an idea which may be hard to sell to managers of natural areas).<br class="">
<br class="">
<br class="">
<br class="">
John Ambler<br class="">
<br class="">
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<br class="">
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<br class="">
---<br class="">
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Message: 2<br class="">
Date: Thu, 8 Sep 2016 13:08:51 +0000 (UTC)<br class="">
From: Richard Gardner <<a href="mailto:rtgardner3@yahoo.com" target="_blank" class="">rtgardner3@yahoo.com</a>><br class="">
To: "Locke, Andrea S" <<a href="mailto:lockeas@buffalostate.edu" target="_blank" class="">lockeas@buffalostate.edu</a>>, Judy Fulton<br class="">
<<a href="mailto:jfulton5@gmail.com" target="_blank" class="">jfulton5@gmail.com</a>>, MAIPC <<a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a>><br class="">
Subject: Re: [MAIPC] Fallopia japonica<br class="">
Message-ID: <<a href="mailto:285765019.1071307.1473340131489@mail.yahoo.com" target="_blank" class="">285765019.1071307.1473340131489@mail.yahoo.com</a>><br class="">
Content-Type: text/plain; charset="utf-8"<br class="">
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Generally, I think of F. japonica as found only near water or in wet areas. F. sachalinensis is usually found in mesic forested areas. My understanding of F. x bohemica?is that it is usually found in open fields and similar.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Richard Gardner<br class="">
<br class="">
<br class="">
From: "Locke, Andrea S" <<a href="mailto:lockeas@buffalostate.edu" target="_blank" class="">lockeas@buffalostate.edu</a>><br class="">
To: Judy Fulton <<a href="mailto:jfulton5@gmail.com" target="_blank" class="">jfulton5@gmail.com</a>>; MAIPC <<a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a>> <br class="">
Sent: Thursday, September 8, 2016 8:13 AM<br class="">
Subject: Re: [MAIPC] Fallopia japonica<br class="">
<br class="">
#yiv1685423039 #yiv1685423039 -- _filtered #yiv1685423039 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv1685423039 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv1685423039 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}#yiv1685423039 #yiv1685423039 p.yiv1685423039MsoNormal, #yiv1685423039 li.yiv1685423039MsoNormal, #yiv1685423039 div.yiv1685423039MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;color:black;}#yiv1685423039 a:link, #yiv1685423039 span.yiv1685423039MsoHyperlink {color:blue;text-decoration:underline;}#yiv1685423039 a:visited, #yiv1685423039 span.yiv1685423039MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv1685423039 p {margin-right:0in;margin-left:0in;font-size:12.0pt;color:black;}#yiv1685423039 tt {}#yiv1685423039 span.yiv1685423039EmailStyle19 {color:#1F497D;}#yiv1685423039 span.yiv1685423039EmailStyle20 {color:#1F497D;}#yiv1685423039 .yiv1685423039MsoChpDefault {font-size:10.0pt;} _filtered #yiv16854230<br class="">
39 {margin:1.0in 1.0in 1.0in 1.0in;}#yiv1685423039 div.yiv1685423039WordSection1 {}#yiv1685423039 Hi Judy, ?I too have difficultly identifying plants in photos and size is definitely difficult to determine. What I saw in the photo that led me to R. x bohemica was the presence of variably shaped leaves on the same plant, both flat/truncate and cordate. R. japonica are generally more rounded at the base, sometimes flatter, but not cordate. The larger leaves of R. sachalinensis are very large, and always cordate. I?ve included a picture from <a href="http://bugwood.org" class="">bugwood.org</a>, for leaf comparison. Keying them out is always a good idea, especially if you?re concerned about the seed viability issue. This is just my quick and dirty method. ?Best,Andrea ? ? ?From: Judy Fulton [<a href="mailto:jfulton5@gmail.com?" target="_blank" class="">mailto:jfulton5@gmail.com</a>] <br class="">
Sent: Wednesday, September 7, 2016 4:43 PM<br class="">
To: Locke, Andrea S <<a href="mailto:lockeas@buffalostate.edu" target="_blank" class="">lockeas@buffalostate.edu</a>>; MAIPC <<a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a>><br class="">
Subject: Re: [MAIPC] Fallopia japonica ?Andrea,<br class="">
You've given me some useful information. I haven't seen Reynoutria x bohemica in the wild that I know of, but I've heard that it's hard to distinguish from R. japonica. I also find it somewhat difficult to ID plants from pictures, and the photos that were sent to me don't show much detail. My understanding is that the easiest characteristic for distinguishing among R. japonica, sachalinensis and x bohemica are the hairs along the veins on the leaf undersides, but those hairs aren't visible in the photos (see Flora of North America: <a href="http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250060601" target="_blank" class="">http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250060601</a> and Weakley's Flora of the Southern and Mid-Atlantic States, page 800: <a href="http://www.herbarium.unc.edu/flora.htm" target="_blank" class="">http://www.herbarium.unc.edu/flora.htm</a>).?? <br class="">
<br class="">
I thought that the plants in the photos appeared to have leaves in the size-range for R. japonica; however, it's conceivable that they are bigger. (In the close-up photo it's hard to compare leaf size to what I assume is a 4 x 4 upright or to the boards on the deck because of foreshortening. I ended up trying to look at the leaf shadows against the boards to determine size.)<br class="">
<br class="">
How sure are you that the plants in the photos are Reynoutria x bohemica? What are the specific leaf size and shape characteristics that you are using to distinguish between R. japonica and x bohemica? Weakley's Flora of the Southern and Mid-Atlantic States says that R. x bohemia has "mid-branch leaf bases usually slightly cordate", whereas R. japonica has "mid-branch leaves truncate (to very broadly V-shaped)". I can make an argument that the mid-branch leaves in the close-up photo look slightly cordate, but I'm not sure, and there are plenty of similar leaf shapes online that are attributed to R. japonica. Can you recommend a key with a more definitive description that I can use in the future? I'm planning to collect samples of some knotweed near me to key it out and see whether it's japonica or x bohemica.<br class="">
<br class="">
Thanks again,<br class="">
Judy<br class="">
____________________________________________<br class="">
<br class="">
Judith P. Fulton<br class="">
Consultant, University of Maryland Extension<br class="">
Master Gardener, University of Maryland Extension<br class="">
Chair, Maryland Invasive Species Council Subcommittee on Invasives Lists<br class="">
410-337-3701<br class="">
<a href="mailto:jfulton5@gmail.comOn" target="_blank" class="">jfulton5@gmail.comOn</a> 9/6/2016 11:35 AM, Locke, Andrea S wrote:<br class="">
In addition to the methods provided, I?ve found success using stem-injection with glyphosate, especially for areas adjacent to water. My understanding is also that japanese knotweed (Reynoutria japonica) doesn?t produce viable seed, however giant knotweed (R. sachalinensis) and the hybrid bohemian knotweed (R. x bohemica) do. Looking at the photographs provided, this is probably bohemian, not japanese. Leaf size and shape are good characteristics to use for differentiation. In my area, bohemian is the most common knotweed, by far. ??Andrea LockeWNY PRISM <a href="mailto:Coordinator716.878.4708lockeas@buffalostate.edu" target="_blank" class="">Coordinator716.878.4708lockeas@buffalostate.edu</a>???From: MAIPC [<a href="mailto:maipc-bounces@lists.maipc.org?" target="_blank" class="">mailto:maipc-bounces@lists.maipc.org</a>] On Behalf Of Judy Fulton<br class="">
Sent: Friday, September 2, 2016 12:00 PM<br class="">
To: MAIPC <<a href="mailto:maipc@lists.maipc.org" target="_blank" class="">maipc@lists.maipc.org</a>><br class="">
Subject: [MAIPC] Fallopia japonica?I was recently sent the attached two photos of what looks like Fallopia japonica (aka Polygonum cuspidatum and Reynoutria japonica), which were taken in May. Apparently, the homeowners, whose property borders Back River in Baltimore County near Rock Creek Park, Maryland, are quite pleased with their decision to plant ?Japanese bamboo? to reduce erosion.<br class="">
<br class="">
I?m concerned because Fallopia japonica can live in salt environments, such as salt marshes. I?ve been informed that the mouth of Back River is at the southern edge of the fresh water zone of the Chesapeake Bay with average salinity of 6 ppt, but salinity can range from <1 ppt to 10 ppt depending on weather conditions.? I?m assuming that the pieces of rhizomes that might break off in a major storm could survive in Back River to colonize other areas, especially if the storm reduced the salinity in the river. Does anyone know if this is correct? Also, would the seeds remain viable if they were transported to another location by Back River?<br class="">
<br class="">
If the homeowners were convinced to remove their Fallopia japonica, what would be the best way to eradicate it so near the water? Something like Rodeo plus a non-ionic surfactant?? <br class="">
<br class="">
Thanks for your advice.? <br class="">
<br class="">
Judy____________________________________________<br class="">
<br class="">
Judith P. Fulton<br class="">
Consultant, University of Maryland Extension<br class="">
Master Gardener, University of Maryland Extension<br class="">
Chair, Maryland Invasive Species Council Subcommittee on Invasives Lists<br class="">
410-337-3701<br class="">
<a href="mailto:jfulton5@gmail.com" target="_blank" class="">jfulton5@gmail.com</a><br class="">
?<br class="">
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