Need ID on odd 15 foot tall weed?

Louisville, KY

OK I usually can ID most plant but this one has got me. I am not the greatest with non tropical plants This looks to be like a inula type plant. It is a weed growing in a friends yard and no one seems to be able to ID it. It is around 10 to 15 feet tall does not branch out it has small daisy like flowers at the top of it. Anyone seen this before or know a name for it??

Thumbnail by bwilliams
Louisville, KY

Closer look at the leaves.

Thumbnail by bwilliams
Louisville, KY

Was unable to take a picture of the flowers they were very high up and looked around half a inch long very small but many were about to bloom.

Columbia, SC(Zone 8a)

is it a vine?

Louisville, KY

Its not a vine it grows from a hollow like stem straight up 10 feet or more.

Columbia, SC(Zone 8a)

yikes, no idea. Have you seen Jack around? It may be his bean stalk.

Hillsboro, OH(Zone 6a)

Maybe one of the wild forms of Helianthus?

Keaau, HI(Zone 11)

Kinda reminds me of a huge weed we saw in Australia that was related to the Sunflower...like Jerusalem Artichokes?

Beautiful, BC(Zone 8b)

It reminds me of the Poplar (Populus) I took pics of today. They can grow very fast but...did you say blooms?

Louisville, KY

The photos I have seen of both plants mentioned dones not look exactly like it? I did think it might be in the sunflower family sense the leaves were very rough feeling. But it did not seem to branch out at all flower stalk seem to come out from around some of the higher up leaves. The flowers were hanging out on stems much like the leaves are in a roseta like form. Here is a closer look of the flower brackets

Thumbnail by bwilliams
Louisville, KY

Here is the best pictures of the flowers I have you can tell they look almost like daisy flowes not yet opened. I am guessing they set seed not sure if they reseed each year or what exactly. Still they have a interesting look in the garden.

Thumbnail by bwilliams
Louisville, KY

One last pic of a few next to each other growing.

Thumbnail by bwilliams
Cincinnati, OH(Zone 6b)

My first thought is Ironweed.
Possibly Vernonia noveboracensis.
Are the flowers purple or yellow?


http://www.robsplants.com/plants/VernoNoveb.php
Ric

This message was edited Sep 5, 2006 11:00 AM

Hillsboro, OH(Zone 6a)

I *think* I see yellow flowers? It could be the sun hitting the plants though.

The leaves hanging down is what is making it hard for me. I've grown a few of the perennial sunflowers and the leaves were very rough and hairy but stood off the plants at a near right angle. H. tuberosus (as Aloha mentioned) grows bit finger like rhizomes like a ginger. Have you dug any?

Louisville, KY

nope have not dug around it. It reminds me of a few of the weeds that are native here. I would not have figured a rhizome at all?

Hillsboro, OH(Zone 6a)

The reason Jerusalem artichokes are called what they are is because you can eat the rhizomes like potatoes. :)

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