[MAIPC] grass i.d.?

Mon Aug 15 07:15:43 PDT 2016

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  sorengr at si.edu<mailto:sorengr at si.edu>
http://tropicos.org/Project/CNWG
________________________________
From: Swearingen, Jil [jil_swearingen at nps.gov]
Sent: Monday, August 15, 2016 9:13 AM
To: Bergmann, Carole
Cc: toni at gracefullygreen.com; MAIPC at lists.maipc.org; Soreng, Robert; 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.. http://plants.usda.gov/core/profile?symbol=SEFA<redir.aspx?REF=T4iyldjvJIB2FoeRgiAx7bzSrok2UtWGmWGgl-kNriav9txCFMXTCAFodHRwOi8vcGxhbnRzLnVzZGEuZ292L2NvcmUvcHJvZmlsZT9zeW1ib2w9U0VGQQ..>

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 <Carole.Bergmann at montgomeryparks.org<redir.aspx?REF=wR44VNFjFCveW3HUJtEUTFpL3a9iUQHHZajvvYrekyav9txCFMXTCAFtYWlsdG86Q2Fyb2xlLkJlcmdtYW5uQG1vbnRnb21lcnlwYXJrcy5vcmc.>> 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. = http://www.illinoiswildflowers.info/grasses/plants/giant_foxtail.htm<redir.aspx?REF=dfurXvH9iCk3hA_DASqOb6apbxkBvPl0s_hp8WF2Icev9txCFMXTCAFodHRwOi8vd3d3LmlsbGlub2lzd2lsZGZsb3dlcnMuaW5mby9ncmFzc2VzL3BsYW50cy9naWFudF9mb3h0YWlsLmh0bQ..>

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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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
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Jil Marie Swearingen  202-339-8318
Regional IPM Program Manager
National Capital Region

Natural Resources and Science
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