[MAIPC] grass i.d.?

Mon Aug 15 19:37:14 PDT 2016

It and its weedy brethren - Setaria viridis var. viridis and S. pumila ssp. pumila are all enormously well established throughout our area, unfortunately.

In fact, I believe the vast numbers now of S. viridis and S. pumila to have displaced the native S. parviflora in the more urbanized areas of our region today.

And it's not as if S. faberi is in any way uncommon either!  One is virtually guaranteed of ID collection material in the D.C. area these days sadly on whatever route one takes!

S. parviflora, nonetheless, is still dominant in the largely clean and intact, sandy-loamy savannah-meadow below and throughout Mount Aventine at Chapman State Park in Charles County, MD.

I also have it in damp, low-lying swales at Jones Point Park along the Potomac River in the City of Alexandria, Virginia.  Check out nearby Penny Hill Cemetery though for a comparison of how S. pumila (and similar crud) can wipe out other native meadow floristic biodiversity.

All the best,

Rod

On Aug 15, 2016, at 9:56 PM, "Marc Imlay" <<mailto:ialm at erols.com>ialm at erols.com<mailto:ialm at erols.com>> wrote:

Recently naturalized from China according to Brown and Brown. Is it invasive?

Marc Imlay, PhD, Chair, MAIPC Biological control working Group Conservation biologist,
Park Ranger Office, Non-native Invasive Plant Control coordinator. Marc.Imlay at pgparks.com<mailto:Marc.Imlay at pgparks.com>
(301) 442-5657 cell  Natural and Historical Resources Division
The  Maryland-National   Capital   Park  and Planning Commission

Marc Imlay, PhD
Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland Chapter of the Sierra Club.

From: MAIPC [mailto:maipc-bounces at lists.maipc.org] On Behalf Of Soreng, Robert
Sent: Monday, August 15, 2016 10:16 AM
To: Swearingen, Jil <<mailto:jil_swearingen at nps.gov>jil_swearingen at nps.gov<mailto:jil_swearingen at nps.gov>>; Bergmann, Carole <<mailto:Carole.Bergmann at montgomeryparks.org>Carole.Bergmann at montgomeryparks.org<mailto:Carole.Bergmann at montgomeryparks.org>>
Cc: <mailto:MAIPC at lists.maipc.org> MAIPC at lists.maipc.org<mailto:MAIPC at lists.maipc.org>; <mailto:Rod.Simmons at alexandriava.gov> <mailto:Rod.Simmons at alexandriava.gov> Rod.Simmons at alexandriava.gov<mailto:Rod.Simmons at alexandriava.gov>
Subject: Re: [MAIPC] grass i.d.?

The photo seems to be of S. faberi as all have suggested,  a few further notes:

S. faberi is the more robust species, and the inflorescence is usuallly obviously lax, drooping from near the base to the middle.  The bristles number (1) 3 (6) per spikelet, the longest are typically ca 10 mm long and finely scabrous, and the longest ones are at least 2xs as long as the spikelets

S. viridis var. viridis inflorescences are short and erect.
S. viridis var. major has longer inflorescences than var. viridis and they can nod near the top
The bristles number 1 to 3 per spikelet, the longest are usually shorter, but vary from 5 to 10 mm long, and are distinctly scabrous with the hooks oriented toward the tips, they are shorter relative to the spikelet length than in S. faberi.

Rob

Robert Soreng PhD, Research Associate
Dept. of Botany - US National Herbarium (US)
National Museum of Natural History
Smithsonian Institution
202-633-0981  <mailto:sorengr at si.edu> <mailto:sorengr at si.edu> sorengr at si.edu<mailto:sorengr at si.edu>
<http://tropicos.org/Project/CNWG><http://tropicos.org/Project/CNWG>http://tropicos.org/Project/CNWG
________________________________
From: Swearingen, Jil [<mailto:jil_swearingen at nps.gov>jil_swearingen at nps.gov<mailto:jil_swearingen at nps.gov>]
Sent: Monday, August 15, 2016 9:13 AM
To: Bergmann, Carole
Cc: <mailto:toni at gracefullygreen.com> <mailto:toni at gracefullygreen.com> toni at gracefullygreen.com<mailto:toni at gracefullygreen.com>; <mailto:MAIPC at lists.maipc.org> <mailto:MAIPC at lists.maipc.org> MAIPC at lists.maipc.org<mailto:MAIPC at lists.maipc.org>; Soreng, Robert; <mailto:Rod.Simmons at alexandriava.gov> <mailto:Rod.Simmons at alexandriava.gov> Rod.Simmons at alexandriava.gov<mailto:Rod.Simmons at alexandriava.gov>
Subject: Re: [MAIPC] grass i.d.?
Carole,

I agree with you about Setaria and think it's probably S. faberi.. <redir.aspx?REF=T4iyldjvJIB2FoeRgiAx7bzSrok2UtWGmWGgl-kNriav9txCFMXTCAFodHRwOi8vcGxhbnRzLnVzZGEuZ292L2NvcmUvcHJvZmlsZT9zeW1ib2w9U0VGQQ..> <http://plants.usda.gov/core/profile?symbol=SEFA> http://plants.usda.gov/core/profile?symbol=SEFA

With all the taxonomic changes and also not being a grass specialist, I'm copy Rod and Rob for their expert assistance.

Thanks,

Jil

On Mon, Aug 15, 2016 at 8:57 AM, Bergmann, Carole <<redir.aspx?REF=wR44VNFjFCveW3HUJtEUTFpL3a9iUQHHZajvvYrekyav9txCFMXTCAFtYWlsdG86Q2Fyb2xlLkJlcmdtYW5uQG1vbnRnb21lcnlwYXJrcy5vcmc.><mailto:Carole.Bergmann at montgomeryparks.org>Carole.Bergmann at montgomeryparks.org<mailto:Carole.Bergmann at montgomeryparks.org>> wrote:
It’s a species of Setaria = “foxtail grass”. There are many different Setarias.
I’d like to see it closer but this looks like giant foxtail. = <redir.aspx?REF=dfurXvH9iCk3hA_DASqOb6apbxkBvPl0s_hp8WF2Icev9txCFMXTCAFodHRwOi8vd3d3LmlsbGlub2lzd2lsZGZsb3dlcnMuaW5mby9ncmFzc2VzL3BsYW50cy9naWFudF9mb3h0YWlsLmh0bQ..> <http://www.illinoiswildflowers.info/grasses/plants/giant_foxtail.htm> http://www.illinoiswildflowers.info/grasses/plants/giant_foxtail.htm

Carole

Carole F. Bergmann
Forest Ecologist/Field Botanist
Park Planning and Stewardship Division
Montgomery Parks
Maryland-National Capital Park & Planning Commission
12535 Milestone Manor Lane
Germantown, Maryland 20876
301-962-1348
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From: MAIPC [mailto:<redir.aspx?REF=2RtcPbUY-t9axlzQiU2UV4rGljFDCzNNiH9C6oimWMuv9txCFMXTCAFtYWlsdG86bWFpcGMtYm91bmNlc0BsaXN0cy5tYWlwYy5vcmc.><mailto:maipc-bounces at lists.maipc.org>maipc-bounces at lists.maipc.org<mailto:maipc-bounces at lists.maipc.org>] On Behalf Of <redir.aspx?REF=y3BbQMj0cyJ2Bdmj2NryNPoki5SudBl77xdhddCIH9w7WN9CFMXTCAFtYWlsdG86dG9uaUBncmFjZWZ1bGx5Z3JlZW4uY29t> <mailto:toni at gracefullygreen.com> toni at gracefullygreen.com<mailto:toni at gracefullygreen.com>
Sent: Wednesday, August 10, 2016 10:33 AM
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Subject: [MAIPC] grass i.d.?

Hello All:

Can you help me identify this grass? I am attaching photos, taken last month. The plant is about 3-4' high, growing on a partly shady, disturbed slope in Montgomery County, MD.

Many thanks for your help.

Toni Bailey

Toni Bailey
Gracefully Green, LLC
Sustainable Landscape Specialists
Silver Spring, Maryland   20910
voice:  301-279-0234
fax:     301-279-0134
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Jil Marie Swearingen  202-339-8318
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