Plant ID forum: Swamp Sunflower (Helianthus angustifolius)

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Name: Dianne
Sacramento, CA, zone 9a
Bulbs Cut Flowers Peonies Plant and/or Seed Trader Region: California Vegetable Grower
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soilsandup
Oct 6, 2011 3:39 PM CST
A co-worker found this growing in a local cemetery here in town (Davis, CA, zone 9a) and wanted to find out what the name of the flower is. It grows with minimal care.


Thumb of 2011-10-06/soilsandup/d1bbda Thumb of 2011-10-06/soilsandup/745aa5
Name: Dianne
Sacramento, CA, zone 9a
Bulbs Cut Flowers Peonies Plant and/or Seed Trader Region: California Vegetable Grower
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soilsandup
Oct 6, 2011 3:41 PM CST
here is a closeup of the blooms.


Thumb of 2011-10-06/soilsandup/5397a7
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
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dave
Oct 6, 2011 3:44 PM CST

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It looks like a Helianthus to me, and if I had to guess I'd say Helianthus salicifolius.
Name: Paul
Utah (Zone 5b)
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Paul2032
Oct 6, 2011 3:53 PM CST
I took pictures of the same plant today in a Utah garden. I knew it was a sunflower but not which one. Almost like magic here it is. Thumbs up
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Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
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Horntoad
Oct 6, 2011 3:59 PM CST
Helianthus angustifolius

http://www.wildflower.org/plants/result.php?id_plant=HEAN2
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Name: Dianne
Sacramento, CA, zone 9a
Bulbs Cut Flowers Peonies Plant and/or Seed Trader Region: California Vegetable Grower
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soilsandup
Oct 6, 2011 4:19 PM CST
That was quick ! Thanks Dave and Jay.

It looks like either of the above - H. salicifolius or H. augustifolius. As a former botany major, I should know what the prefix in front of the folius means, but I don't. Hilarious!

[Last edited by soilsandup - Oct 6, 2011 11:54 AM (+)]
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Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Oct 6, 2011 4:33 PM CST
I'm starting to recognize some of the latin terms
augusti = narrow

salici from salix = willow like
wildflowersoftexas.com
texasnatureonline.com


Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Oct 6, 2011 6:04 PM CST
soilsandup said:That was quick ! Thanks Dave and Jay.

It looks like either of the above - H. salicifolius or H. augustifolius. As a former botany major, I should know what the prefix in front of the folius means, but I don't. Hilarious!


I'm incline to say H. angustifolius.
I have never seen H. salicifolius in person and can't find a good description for it. But looking around at pics on the internet H. salicifolius seems to have a uniformly drooping and maybe soft leaf. H. angustifolius has stiff course leaf like sandpaper. If you notice in your pic the leaves stick more straight out from the plant sometimes curling or twisting this is how the H. angustifolius does in my garden.
wildflowersoftexas.com
texasnatureonline.com


Name: Dianne
Sacramento, CA, zone 9a
Bulbs Cut Flowers Peonies Plant and/or Seed Trader Region: California Vegetable Grower
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soilsandup
Oct 6, 2011 6:32 PM CST
Thanks, Jay. The leaves do look stiff. Is it invasive in your garden? I asked my co-worker to collect some seeds for me so I can start a couple of plants in my yard in Sacramento. I notice we are in the same planting zone - 9a. I love the mild winters and I am always on the lookout for flowering plants for the fall and winter seasons. But I certainly do not need anything else invasive in my yard.

Thanks for the Latin lesson. For some reason, I read the name as augustifolius instead of angustifolius. I now have two new words in memory - hopefully it doesn't knock out two other words that I will need in the future.
Name: Lin
Florida (Zone 9b)
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plantladylin
Oct 6, 2011 6:38 PM CST
My first thought was Helianthus angustifolius too and it can be a nuisance in some situations:

http://www.floridata.com/ref/h/heli_ang.cfm
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Name: Jay
Nederland, Texas (Zone 9a)
Region: Texas Region: Gulf Coast Charter ATP Member I helped beta test the first seed swap I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database!
Celebrating Gardening: 2015 Plant Identifier Tip Photographer Garden Sages Garden Ideas: Master Level Hibiscus
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Horntoad
Oct 6, 2011 6:51 PM CST
This is the first year I grow it. It grows wild a couple of hundred yards from my house. I have been fighting to keep it going, because it needs consistent moisture as the common name "swamp sunflower" might tell you.
Here are some of the wild ones growing near me.

Thumb of 2011-10-07/Horntoad/2da515

Thumb of 2011-10-07/Horntoad/93b0a9
wildflowersoftexas.com
texasnatureonline.com


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