[MAIPC] Invasive? (Mazus)

Fri May 6 15:12:44 PDT 2022

Thanks all for the responses.

Patricia Pearl Greenberg
Invasive Management Area (IMA) Program Manager
Office: 703-324-8673
(She/Her/Hers)

From: Elizabeth Mizell <beth at blueridgeprism.org>
Sent: Thursday, May 5, 2022 4:45 PM
To: Donna Ford-Werntz <dford2 at wvu.edu>
Cc: Greenberg, Patricia <Patricia.Greenberg at fairfaxcounty.gov>; MAIPC at Lists.maipc.org; James.P.Vanderhorst at wv.gov; John Q Burkhart <john.q.burkhart at wv.gov>
Subject: Re: [MAIPC] Invasive? (Mazus)

Blue Ridge PRISM was also contacted about this species.

Based on the flower this looks like Mazus miquelii which is a perennial. It is quite a cute little plant with a lovely flower, but invasive. Yikes.

https://michiganflora.net/species.aspx?id=1907<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmichiganflora.net%2Fspecies.aspx%3Fid%3D1907&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=EpDHuoUrNYxkTKQsJXCiN3%2B1s6vrnHb8z%2BCg4yuYS5w%3D&reserved=0>
https://gobotany.nativeplanttrust.org/species/mazus/miquelii/<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgobotany.nativeplanttrust.org%2Fspecies%2Fmazus%2Fmiquelii%2F&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=d6eIqi9V74jPOV4kY1vwJcW9QnKPl0blszOyUIfnngM%3D&reserved=0>

http://vaplantatlas.org/index.php?do=plant&plant=645&search=Search<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvaplantatlas.org%2Findex.php%3Fdo%3Dplant%26plant%3D645%26search%3DSearch&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=zihY9bn8h4gnpZJyjlu2Ujp7Ul06PhFkPBFaWgJQLgs%3D&reserved=0>

My initial thoughts on control that I conveyed to the concerned landowner:

I could not readily find any specific control recommendations. Assuming it was restricted to the lawn, treating it as a lawn seems like a good option and a lawn-care company would be helpful in this instance. Also, contacting a local extension service for assistance. Controlling weeds in lawns is not my area of expertise and I am not super familiar with the chemical control options on the market that would be most effective.  The local extension service may be a good option or at least able to connect to a turfgrass specialist.

At a minimum, weed whack the plant to remove the flowers and interrupt reproduction for this year (?). Or if you do not care about the grass, use a glyphosate product to control the plants.  Triclopyr amine should not impact the grass, but control the Mazus.

Does anyone have any additional experience or other recommendations for this plant?

Beth Mizell

_______________________________________
Elizabeth Anne Mizell
Program Director | Blue Ridge PRISM
beth at blueridgeprism.org<mailto:beth at blueridgeprism.org>

Blue Ridge PRISM<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fblueridgeprism.org%2F&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=h2nXTkbuFjjMWOuJd9YOIqIw7%2FN4pIydXSAmacNsmwI%3D&reserved=0> is a partnership for regional invasive species management in Virginia.

On Thu, May 5, 2022 at 3:16 PM Donna Ford-Werntz <dford2 at wvu.edu<mailto:dford2 at wvu.edu>> wrote:
Patricia, Both Mazus species are known for WV: M. miquelii (4 of 55 counties) since 1938 (garden) & M. pumilus (2 cos.) in 1980+.
All 8 collections in the WVU herbarium are from garden, lawn, or sidewalk paver localities (planted &/or naturalized/spreading).

Donna Ford-Werntz, Ph.D.
Service Professor/Herbarium Curator
Biology Dept., Box 6057
Life Sci. Bldg., 53 Campus Dr.
West Virginia Univ.
Morgantown, WV 26506
304-293-0794; biology.wvu.edu<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fbiology.wvu.edu%2F&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FNoP2nIPApbMZJP3zINDTLhhCYHxifamdkKwdkMe0aw%3D&reserved=0>
________________________________
From: MAIPC <maipc-bounces at lists.maipc.org<mailto:maipc-bounces at lists.maipc.org>> on behalf of Greenberg, Patricia <Patricia.Greenberg at fairfaxcounty.gov<mailto:Patricia.Greenberg at fairfaxcounty.gov>>
Sent: Monday, May 2, 2022 8:24 AM
To: MAIPC at Lists.maipc.org<mailto:MAIPC at Lists.maipc.org> <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>
Subject: [MAIPC] FW: Invasive?

Hi,

I'm not familiar with Mazus miquelii or Mazus pumilus - a perennial, creeping groundcover native to Japan and China. It is considered an invasive in the northeast according to Wikipedia. I'm finding much information about it being invasive on the web and wanted to ask the MAIPC what experience you've had with this plant? EddMaps only has Mazus pumilus listed in the New York and New Jersey area. iNaturalist had a few points and one listed here in Reston, VA.

USDA has it listed in more states.

USDA Plants Database<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fplants.usda.gov%2Fhome%2FplantProfile%3Fsymbol%3DMAMI4&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=nYcwNzjPDG5Llb2Cp%2F%2B%2B8j4%2BVcoxjLyEN6Fulgh2CD4%3D&reserved=0>

Would you consider it an EDRR species?

See photos below.

 Thank you,

Patricia Pearl Greenberg
Ecologist II

Invasive Management Area (IMA) Program Manager

Natural Resource Branch

Fairfax County Park Authority

Office: 703-324-8673

patricia.greenberg at fairfaxcounty.gov<mailto:patricia.greenberg at fairfaxcounty.gov>

(She/Her/Hers)

ISA Certified Arborist, MA-6067A

ISA Tree Risk Assessment Qualified

[cid:image001.jpg at 01D86174.E0315660]<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fairfaxcounty.gov%2Fparks%2Finvasive-management-area&data=05%7C01%7CPatricia.Greenberg%40fairfaxcounty.gov%7Ce72e794150f94ff5fd5308da2ed83ce8%7Ca26156cb5d6f41729d7d934eb0a7b275%7C0%7C0%7C637873803536785503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lR97g5MRZreefD9bWMizFTkGtYVE5hWdPkqdLuS6Qhg%3D&reserved=0>

From: Sara H <sh12sh34 at gmail.com<mailto:sh12sh34 at gmail.com>>
Sent: Sunday, May 1, 2022 10:43 PM
To: Medina, Gloria <Gloria.Medina at fairfaxcounty.gov<mailto:Gloria.Medina at fairfaxcounty.gov>>; Greenberg, Patricia <Patricia.Greenberg at fairfaxcounty.gov<mailto:Patricia.Greenberg at fairfaxcounty.gov>>
Subject: Invasive?

Hi ladies
Is this invasive?
We have patches in our yard. Remove by pulling?

[cid:image002.jpg at 01D86174.E0315660]

[cid:image003.jpg at 01D86174.E0315660]

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