Plant ID forum: Is this Oenothera?

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Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
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plantrob
Jun 20, 2015 6:32 PM CST
Self-seeded, but I don't remember from which species. Flowers are white, open in evening, fade to pink. No yellow center to flowers. Mid-green leaves.

Thumb of 2015-06-21/plantrob/b228c8

Rob from Pennsylvania - robsplants.com

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bamira
Jun 20, 2015 6:42 PM CST
http://www.fireflyforest.com/flowers/1725/oenothera-caespito...

I tip my hat to you.
I can't see the entire rosette awarded, It may even be Oenothera speciosa 'Rosea', It is a shady spot, is it true?
Thumb of 2015-06-21/bamira/9a8f00
my Oenothera speciosa 'Siskiyou'

maybe
Oenothera acaulis
http://www.robsplants.com/plants/OenotAcaul
[Last edited by bamira - Jun 24, 2015 1:48 PM (+)]
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Name: Tara
NE, Florida (Zone 9a)
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terrafirma
Jun 20, 2015 6:47 PM CST
Don't think I agree....Still researching...
Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
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plantrob
Jun 20, 2015 8:37 PM CST
Not a shady spot - the color balance on the photo comes from having to take the photo when the flowers opened, after dusk had arrived. The leaves aren't right, I believe, for berlandieri, acaulis, or cespitosa. Oenothera speciosa (at least the ones I grow) are more generous with their hours of flowering.
Rob from Pennsylvania - robsplants.com
Name: josephine
Arlington, Texas (Zone 8a)
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frostweed
Jun 22, 2015 6:44 AM CST
I think it is Common Evening Primrose, Oenothera biennis Smiling
http://www.wildflower.org/gallery/result.php?id_image=26355
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bamira
Jun 22, 2015 7:23 AM CST
[quote="frostweed"]I think it is Common Evening Primrose, Oenothera biennis Smiling
]http://www.wildflower.org/gallery/result.php?id_image=26355[...

my A. biennis

do you think they are similar?

Name: josephine
Arlington, Texas (Zone 8a)
Hi Everybody!! Let us talk native.
Native Plants and Wildflowers Organic Gardener Butterflies Garden Ideas: Master Level Forum moderator I was one of the first 300 contributors to the plant database!
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frostweed
Jun 22, 2015 10:19 AM CST
The plants on Bamira's picture are old and overgrown, so no those don't look similar, but on a young plant, they do look similar. Smiling
Wildflowers are the Smiles of Nature.
Gardening with Texas Native Plants and Wildflowers.
Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
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plantrob
Jun 22, 2015 7:45 PM CST
Definitely not Oenothera biennis. Those grow in my garden (as an occasionally tolerated weed), and are strong upright growers with yellow flowers. My mystery plants are whispy (no strong upright stalk) with pure white flowers. I realize that my photo doesn't show the habit of the plants all that well (there's that dusk again), but these plants are no more than 6 inches tall, with no inclination to get any taller.
Rob from Pennsylvania - robsplants.com
Name: Greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
Jun 22, 2015 8:16 PM CST
Yep, not O. biennis. That stuff towers over my head!

Take a look at this one, Oenothera caespitosa.
Common names: Dwarf Evening primrose, White Tufted Evening primrose, Morning-lily, Handkerchief Plant.
http://www.nps.gov/arch/learn/nature/onagraceae_oenothera_ca...
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~~"Leaf of Faith"
Name: josephine
Arlington, Texas (Zone 8a)
Hi Everybody!! Let us talk native.
Native Plants and Wildflowers Organic Gardener Butterflies Garden Ideas: Master Level Forum moderator I was one of the first 300 contributors to the plant database!
I helped plan and beta test the plant database. Charter ATP Member Plant Identifier Birds Cat Lover Xeriscape
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frostweed
Jun 22, 2015 9:34 PM CST
Well it looks like I was way off the mark and caespitosa looks more like it. Smiling
Wildflowers are the Smiles of Nature.
Gardening with Texas Native Plants and Wildflowers.
Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
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plantrob
Jun 23, 2015 6:29 AM CST
Caespitosa is indeed much closer, but still not it. Caespitosa's petals are distinctly cleft, while mine are indistinctly fringed or entire-margined. Caespitosa's leaves look to be gray-green and sturdy, forming a robust clump, while mine are mid-green and floppy, forming a much looser plant. In fact, I'd like to grow caespitosa sometime :-)
Rob from Pennsylvania - robsplants.com
Name: Greene
Savannah, GA (Sunset 28) (Zone 8b)
Rabbit Keeper Critters Allowed Celebrating Gardening: 2015 Plant Identifier Garden Ideas: Master Level Garden Sages
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greene
Jun 23, 2015 8:33 AM CST
Perhaps it might help if you could add more images, details of the foliage, petals, etc. Something for size reference?

Once the identification is made, I want to be on a list to beg for seeds. Thumbs up
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~~"Leaf of Faith"
Name: Kent Pfeiffer
Southeast Nebraska (Zone 5b)
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KentPfeiffer
Jun 23, 2015 9:24 AM CST

Moderator

Could be White Evening Primrose (Oenothera pallida), but I can't really see enough of it to be sure.

There are many species of white-flowered Oenotheras growing in the American West, but most of them are difficult to grow outside their native range. I've tried growing Gumbo Lily (Oenothera cespitosa), for example, which is native to my state (although at the other end), but have never been able to keep them alive for very long. We'll get a stretch of hot humid weather in the summer and that's the end of them. They are so well adapted at preventing moisture loss through their leaves that, when confronted with high humidity, they just melt.

Oenothera pallida is one of the exceptions and can occasionally be seen in gardens in the East.
Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
Image
plantrob
Jun 23, 2015 5:59 PM CST
Yes, I agree we need more photos :-)
This one isn't the greatest, but it gives a better impression of overall size (note the lawn grass next to it) as well as color and habit of the leaves. The photo is not of a single plant, but a cluster of self-sown plants. It was taken around 7pm, and the flowers haven't opened up yet.
I'm growing O. pallida as well this year, and its leaves are quite different in appearance. No blooms on that one, probably not before next year.

Thumb of 2015-06-23/plantrob/0b1128

Rob from Pennsylvania - robsplants.com
Name: Rob
Lehigh Valley, Pennsylvania (Zone 6b)
Ever looking for new plants to kill
Seed Starter Frogs and Toads Celebrating Gardening: 2015
Image
plantrob
Jul 5, 2015 8:29 PM CST
My O. pallida has now bloomed, and has quite different buds (puffy, hairy) from the ones on my mystery plants:

Thumb of 2015-07-06/plantrob/2f7b62

These are more similar to the twisty kind seen on O. glazioviana (another species that grows much taller).
Rob from Pennsylvania - robsplants.com

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