<div dir="auto">We have been doing sweeps for it in Arlington VA and finding plants in the Four Mile Run watershed. Not too many plants yet but it's easy to see its spreading potential. Superficially it seems to float seeds downstream along the flood plain. We have tried to diligently report patches in iNat. Cheers, Steve Young, Volunteer, Master Naturalist</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 27, 2023, 10:27 AM Ossi, Damien (DOEE) <<a href="mailto:damien.ossi@dc.gov">damien.ossi@dc.gov</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hi folks,<u></u><u></u></p>
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<p class="MsoNormal">If you’re like me, you have not been aware of the rapid growth of incised fumewort in the past few years. Under Sara Tangren’s leadership the Nat Cap PRISM started tracking it this spring with our network of Invader Detectives.
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<p class="MsoNormal">It’s…everywhere, and it appears to be outcompeting or outright killing bluebells wherever they occur together. USDA’s weed risk assessment for this species found no evidence for allelopathy in field tests, but that had high uncertainty.<u></u><u></u></p>
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<p class="MsoNormal">Please click on the iNatualist entry below and look at the images. It appears to occupy 1+ acres in Seneca Creek State Park in Montgomery County. This is the largest population that we have found this year, but it appears to go from a
few plants to a large population in only two or three seasons.<u></u><u></u></p>
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<p class="MsoNormal">Have you been tracking this plant in your area?<u></u><u></u></p>
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<p class="MsoNormal">Damien<u></u><u></u></p>
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<p class="MsoNormal"><b>Damien Ossi<u></u><u></u></b></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt">Wildlife Biologist</span></i><span style="font-size:10.0pt"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Fisheries and Wildlife Division<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Department of Energy and Environment<u></u><u></u></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:black">202-741-0840</span><span style="font-size:10.0pt;color:#282828"><br>
<a href="mailto:damien.ossi@dc.gov" target="_blank" rel="noreferrer">damien.ossi@dc.gov</a><u></u><u></u></span></p>
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<p class="MsoNormal"><b>From:</b> <a href="mailto:invaderdetectives@googlegroups.com" target="_blank" rel="noreferrer">
invaderdetectives@googlegroups.com</a> <<a href="mailto:invaderdetectives@googlegroups.com" target="_blank" rel="noreferrer">invaderdetectives@googlegroups.com</a>>
<b>On Behalf Of </b>Tangren, Sara (DOEE)<br>
<b>Sent:</b> Monday, April 17, 2023 11:36 AM<br>
<b>To:</b> <a href="mailto:invaderdetectives@googlegroups.com" target="_blank" rel="noreferrer">invaderdetectives@googlegroups.com</a><br>
<b>Subject:</b> [InvaderDetectives] incised fumewort infestations can be really bad<u></u><u></u></p>
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<p class="MsoNormal" style="line-height:12.0pt;background:#ffeb9c"><b><span style="font-size:10.0pt;color:#9c6500">CAUTION:</span></b><span style="font-size:10.0pt;color:black"> This email originated from outside of the DC Government. Do not click on links
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<p class="MsoNormal">Hi All, <u></u><u></u></p>
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<p class="MsoNormal">I’ve spent the last week helping combat an infestation at Hemlock Overlook Park (Bull Run watershed, VA). The appearance of what is going on there suggests that the plants are allelopathic, but only scientific tests could tell us for sure.
To see the bluebells, violets, and spring beauties being overrun was heartbreaking. It took only 3 years to go from first observation to serious ecological damage and first response. We’ve got to react to this species more quickly from here on out.<u></u><u></u></p>
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<p class="MsoNormal">Today I’m catching up on iNat reviews and came across this one by our own esummerbell. Her photos do an excellent job of capturing just how bad incised fumewort can get, please have a look. <u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><a href="https://www.inaturalist.org/observations/155117633" target="_blank" rel="noreferrer"><span style="color:#272727;text-decoration:none">Incised Fumewort (Corydalis incisa)</span></a></span><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Helvetica",sans-serif;color:black"><a href="https://www.inaturalist.org/observations/155117633" target="_blank" rel="noreferrer"><span style="color:gray;text-decoration:none">inaturalist.org</span></a></span><span style="font-size:8.5pt;font-family:"Helvetica",sans-serif"><u></u><u></u></span></p>
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<p class="MsoNormal">I think we need to have a meeting this winter and develop a region wide (or nationwide) management plan, something large scale.<u></u><u></u></p>
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<p class="MsoNormal">Best,<u></u><u></u></p>
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<p class="MsoNormal">Sara<u></u><u></u></p>
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<p class="MsoNormal"><span style="color:black">Sara A. Tangren, Ph.D.<br>
Coordinator<br>
National Capital PRISM<br>
Department of Energy & Environment<br>
Government of the District of Columbia<br>
1200 First Sreet NE, Fifth Floor<br>
Washington, DC 20002<br>
<a href="mailto:sara.tangren@dc.gov" target="_blank" rel="noreferrer">sara.tangren@dc.gov</a><u></u><u></u></span></p>
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