Plant ID forum: My brother's new mystery weed

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Name: Marylyn
Houston, TX (Zone 9a)
Charter ATP Member I was one of the first 300 contributors to the plant database! I sent a postcard to Randy! Region: Texas Daylilies Lilies
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Marylyn
May 17, 2014 11:11 PM CST
Yet another one I think I should know, but don't. Hilarious! What is this plant? He lives in central Ohio.
Thumb of 2014-05-18/Marylyn/afa149

Name: Danita
GA (Zone 7b)
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Danita
May 17, 2014 11:41 PM CST
It appears to be Dame's Rocket (Hesperis matronalis.)
When I was visiting Ohio and Pennsylvania years ago, I saw it blooming everywhere including thick stands of it growing by the roadsides.

Dame's Rocket (Hesperis matronalis)

Smiling
Name: Janet Super Sleuth
Near Lincoln UK
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JRsbugs
May 18, 2014 4:19 AM CST
There's a long list of Hesperis, it could be Hesperis matronalis 'Alba', but it's not guaranteed.

Dame's Rocket (Hesperis matronalis 'Alba')

The form 'Alba' might be the same as Hesperis matronalis var. albiflora ..

http://www.rhsplants.co.uk/plants/_/perennials/hesperis-matr...

However, that is not listed on the Plant List.

http://www.theplantlist.org/tpl1.1/search?q=Hesperis+matrona...

The list on ATP ..

http://garden.org/plants/browse/plants/genus/Hesperis/

If it's a plant which appears to be endemic then you should check which species are in the area.

Strangely, a search for the genus in Ohio first brought up the straight species Hesperis matronalis with two subspecies, ssp. candida and ssp. voronovii ..

http://luirig.altervista.org/flora/taxa/north-america.php?re...

After clicking on one of them, then going back I had to reselect the state Ohio, then it only showed Hesperis matronalis. Any subspecies, as far as I know, can be included in the straight species as they are essentially the same species with slight variations often due to location.

Hesperis matronalis is the only species it could be assuming we have got the genus correct, it looks like it to me.

http://luirig.altervista.org/flora/taxa/floranam.php?genere=...
[Last edited by JRsbugs - May 18, 2014 4:24 AM (+)]
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Name: Marylyn
Houston, TX (Zone 9a)
Charter ATP Member I was one of the first 300 contributors to the plant database! I sent a postcard to Randy! Region: Texas Daylilies Lilies
Cat Lover Garden Ideas: Level 1
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Marylyn
May 18, 2014 9:18 PM CST
Thank you, Janet and Danita!! Thumbs up Thumbs up Thumbs up
[Last edited by Marylyn - May 19, 2014 11:34 AM (+)]
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Name: Danita
GA (Zone 7b)
Charter ATP Member Forum moderator Hummingbirder Salvias Butterflies Birds
Plant Identifier Vegetable Grower Container Gardener Seed Starter Cat Lover Region: Georgia
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Danita
May 18, 2014 9:36 PM CST
Hesperis matronalis isn't native to the Americas but is an Eurasian plant that was introduced here. It has spread enthusiastically and is even considered invasive and banned in some states. When I saw it growing in Ohio and Pennsylvania all over the roadsides, there were plants ranging in color from dark lavender-purple to pure white and every shade in between.
Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
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JRsbugs
May 19, 2014 3:42 AM CST
I tip my hat to you. Thumbs up

I have it in my garden, growing from who knows when or where from. It's loved by some butterflies.
Name: Anna Sartin
Cincinnati, Ohio (Zone 6a)
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AnnaSartin
May 19, 2014 7:19 AM CST
So lucky, I LOVE Dame's Rocket! Used to have it where I used to live and it smelled amazing!

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